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ericsson internal product specification 1 (4) prepared (also subject responsible if other) no. sec/s kevin zhou 1/1301-bmr 453 approved checked date rev reference sec/s kevin zhou 2010-03-09 f key features ? industry standard quarter-brick 57.9 x 36.8 x 11.6 mm (2. 28 x 1.45 x 0.46 in.) ? high efficiency, typ. 96% at half load, 12 vout ? +/- 2% output voltage tolerance band ? 1500 vdc input to output isolation ? 1.1 million hours mtbf ? optional baseplate ? iso 9001/14001 certified supplier ? pmbus revision 1.1 compliant power management ? programmable build-in active current share up to 792 w in parallel configuration ? configurable soft start/stop ? precision delay and ramp-up ? voltage sequencing and margining ? voltage/current/temperature monitoring ? configurable output voltage ? power good ? synchronization ? voltage track safety approvals design for environment se-57003m1 meets requirements in high- temperature lead-free soldering processes. ericsson internal table of contents 1 (1) prepared (also subject responsible if other) no. sec/s kevin zhou 00152-enlzt146395 approved checked date rev reference sec/s kevin zhou 2010-03-09 e contents ordering info rmation ............................................................. 2 general info rmation ............................................................. 2 safety specif ication ............................................................. 3 absolute maximu m ratings ............................................................. 4 functional de scription ............................................................. 5 electrical specification 9 v, 33 a / 297 w bmr 453 00 00/002............................... 6 12 v, 33 a / 396 w bmr 453 00 00/001............................... 9 emc specific ation ........................................................... 12 operating info rmation ........................................................... 13 parallel o peratio n ........................................................... 15 thermal consi derations ........................................................... 17 connecti ons ........................................................... 18 pmbus communications ........................................................... 19 mechanical in formati on ........................................................... 22 soldering info rmation ........................................................... 24 delivery info rmation ........................................................... 24 product qualification specificat ion ........................................................... 25 e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation
ericsson internal product specification 2 (4) prepared (also subject responsible if other) no. sec/s kevin zhou 1/1301-bmr 453 approved checked date rev reference sec/s kevin zhou 2010-03-09 f ordering information product program output bmr4530000/002 9 v / 33 a, 297 w bmr4530000/001 12 v / 33 a, 396 w product number and packaging bmr453 n 1 n 2 n 3 n 4 / n 5 n 6 n 7 n 8 mechanical pin o p tion x / mechanical option x / hardware option x x / configuration file / x x x x optional designation description n 1 n 2 n 3 n 4 n 5 n 6 n 7 n 8 (optional) packaging 0 = standard pin length 5.33 mm 2 = lead length 3.69 mm (cut) 3 = lead length 4.57 mm (cut) 4 = lead length 2.79 mm (cut) 5 = lead length 2.79 mm stand off 6.7 mm 0 = open frame 1 = baseplate 2 = baseplate with gnd-pin 00 = 8.1-13.2vout with digital interface 01 = 8.1-13.2vout without digital interface 001 = 12 v standard configuration 002 = 9 v standard configuration xxx = application specific configuration m = master configuration s = slave configuration 20 converters/tray/box pe foam dissipative example: product number bmr4532000/002 equals an through hole mount lead length 3.69 mm (cut), open frame, digital interface with 9 v standard configuration variant. for application specific configurations contact your local ericsson power modules sales representative. general information reliability the mean time between failure (mtbf) is calculated at full output power and an operating ambient temperature (t a ) of +40c, which is a typical condition in information and communication technology (ict) equipment. different methods could be used to ca lculate the predicted mtbf and failure rate which may give different results. ericsson power modules currently uses telcordia sr332. predicted mtbf for the series is: - 1.1 million hours according to telcordia sr332, issue 1, black box technique. telcordia sr332 is a commonly used standard method intended for reliability calculations in ict equipment. the parts count procedure used in this method was originally modelled on the methods from mil-hdbk-217f, reliability predictions of electronic equipment. it assumes that no reliability data is available on the actual units and devices for which the predictions are to be made, i.e. all predictions are based on generic reliability parameters. compatibility with rohs requirements the products are compatible with the relevant clauses and requirements of the rohs di rective 2002/95/ec and have a maximum concentration value of 0.1% by weight in homogeneous materials for lead, mercury, hexavalent chromium, pbb and pbde and of 0.01% by weight in homogeneous materials for cadmium. exemptions in the rohs di rective utilized in ericsson power modules products include: - lead in high melting temperature type solder (used to solder the die in semiconductor packages) - lead in glass of electronics components and in electronic ceramic parts (e .g. fill material in chip resistors) lead as an alloying element in copper alloy containing up to 4% lead by weight (used in connection pins made of brass) quality statement the products are designed and manufactured in an industrial environment where quality systems and methods like iso 9000, 6 (sigma), and spc are intensively in use to boost the continuous impr ovements strategy. infant mortality or early failures in the products are screened out and they are subjected to an ate-based final test. conservative design rules, design reviews and product qualifications, plus the high competence of an engaged work force, contribute to the high quality of our products. warranty warranty period and conditions are defined in ericsson power modules general terms and conditions of sale. limitation of liability ericsson power modules does not make any other warranties, expressed or implied including any warranty of merchantability or fitness for a particular purpose (including, but not limited to, use in life support applications, where malfuncti ons of product can cause injury to a person?s health or life). ? ericsson ab 2009 the information and specifications in this technical specification is believed to be correct at the time of publication. however, no liability is accepted for inaccuracies, printing errors or for any consequences thereof. ericsson ab reserves the right to change the contents of this technical spec ification at any time without prior notice. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 2
ericsson internal product specification 3 (4) prepared (also subject responsible if other) no. sec/s kevin zhou 1/1301-bmr 453 approved checked date rev reference sec/s kevin zhou 2010-03-09 f safety specification general information ericsson power modules dc/dc converters and dc/dc regulators are designed in accordance with safety standards iec/en/ul60950, safety of information technology equipment . iec/en/ul60950 contains requirements to prevent injury or damage due to the following hazards: ? electrical shock ? energy hazards ? fire ? mechanical and heat hazards ? radiation hazards ? chemical hazards on-board dc-dc converters and dc/dc regulators are defined as component power supplies. as components they cannot fully comply with the provisions of any safety requirements without ?conditions of acceptability?. clearance between conductors and between conductive parts of the component power supply and conductors on the board in the final product must meet the applicable safety requirements. certain conditions of acceptability apply for component power supplies with limited stand-off (see mechanical information for further information). it is the responsibility of the insta ller to ensure that the final product housing these components complies with the requirements of all applicable safety standards and directives for the final product. component power supplies for general use should comply with the requirements in iec60950, en60950 and ul60950 ?safety of information technology equipment?. there are other more product related standards, e.g. ieee802.3af ?ethernet lan/man data terminal equipment power?, and ets300132-2 ?power supply interface at the input to telecommunications equipment; part 2: dc?, but all of these standards are ba sed on iec/en/ul60950 with regards to safety. ericsson power modules dc/dc converters and dc/dc regulators are ul60950 recognized and certified in accordance with en60950. the flammability rating for all construction parts of the products meets requirements for v-0 class material according to iec 60695-11-10. the products should be installed in the end-use equipment, in accordance with the requirements of the ultimate application. normally the output of the dc/dc converter is considered as selv (safety extra low voltage) and the input source must be isolated by minimum double or reinforced insulation from the primary circuit (ac mains) in accordance with iec/en/ul60950. isolated dc/dc converters it is recommended that a slow blow fuse with a rating twice the maximum input current per selected product be used at the input of each dc/dc converte r. if an input filter is used in the circuit the fuse should be placed in front of the input filter. in the rare event of a component problem in the input filter or in the dc/dc converter that imposes a short circuit on the input source, this fuse will provide the following functions: ? isolate the faulty dc/dc converter from the input power source so as not to affect the operation of other parts of the system. ? protect the distribution wiring from excessive current and power loss thus preventing hazardous overheating. the galvanic isolation is verified in an electric strength test. the test voltage (v iso ) between input and output is 1500 vdc or 2250 vdc for 60 seconds (refer to product specification). leakage current is less than 1 a at nominal input voltage. 24 v dc systems the input voltage to the dc/dc converter is selv (safety extra low voltage) and the output remains selv under normal and abnormal operating conditions. 48 and 60 v dc systems if the input voltage to the dc/dc converter is 75 vdc or less, then the output rema ins selv (safety extra low voltage) under normal and abnormal operating conditions. single fault testing in the input power supply circuit should be performed with the dc/dc converter connected to demonstrate that the input voltage does not exceed 75 vdc. if the input power source circuit is a dc power system, the source may be treated as a tnv2 circuit and testing has demonstrated compliance with selv limits and isolation requirements equivalent to basic insulation in accordance with iec/en/ul60950. non-isolated dc/dc regulators the input voltage to the dc/dc regulator is selv (safety extra low voltage) and the output remains selv under normal and abnormal operating conditions. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 3
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d absolute maximum ratings characteristics min typ max unit t p1 operating temperature (see thermal c onsideration section) -40 +125 c t s storage temperature -55 +125 c v i input voltage -0.5 80 v v iso isolation voltage (input to output test voltage), see note 1 1500 vdc v tr input voltage transient (tp 100 ms) 100 v v rc remote control pin voltage -0.3 18 v v logic i / o salert, ctrl, sync, scl, sda, sa(0,1) -0.3 3.6 v stress in excess of absolute maximum ratings may cause permanent damage. absolute maximum ratings, sometimes referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits of output data or electrical characteristics. if exposed to s tress above these limits, function and performance may degrade in an unspecified manner. note 1: isolation voltage (input/output to base-plate) max 750vdc. fundamental circuit diagram -in +in +out -out driver driver control rc isolation auxillary supply rc e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 4
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d functional description t p1 = -40 to +90oc, v i = 36 to 75 v, sense pins connected to output pins unless otherwise s pecified under conditions. typical values given at: t p1 = +25c, v i = 53 v, max i o , unless otherwise specified under conditions configuration file: 190 10-cda 102 935/001 rev d characteristics conditions min typ max unit pmbus monitoring accuracy vin_read input voltage -3 +0.4 3 % vout_read output voltage v i = 53 v -1.0 -0.3 1.0 % iout_read output current v i = 53 v, 50-100% of max i o -6 -0.1 6 % iout_read output current v i = 53 v, 10% of max i o -0.7 - 0.7 a temp_read temperature -5 - 5 oc fault protection characteristics factory default - 33 - v setpoint accuracy -3 - 3 % factory default - 1.8 - v hysteresis configurable via pmbus of threshold range, note 1 0 - - v input under voltage lockout, uvlo delay - 200 - s factory default - 0 - v vout_uv_fault_limit configurable via pmbus, note 1 0 - 16 v factory default - 15.6 - v vout_ov_fault_limit configurable via pmbus, note 1 v out - 16 v (output voltage) over/under voltage protection, ovp/uvp fault response time - 200 - s setpoint accuracy io -6 6 % factory default - 38 - iout_oc_fault_limit configurable via pmbus, note 1 0 - 100 a over current protection, ocp fault response time - 200 - s factory default - 135 - otp_fault_limit configurable via pmbus, note 1 -50 135 factory default 10 otp hysteresis configurable via pmbus, note 1 0 165 c over temperature protection, otp fault response time - 200 - s logic input/output characteristics logic input low (v il ) - - 0.8 v logic input high (v ih ) ctrl_cs, sa0, sa1, pg_sync, scl, sda, 2.0 - - v logic output low (v ol ) ctrl_cs, pg_sync, salert, scl, sda i ol = 5 ma - - 0.4 v logic output high (v oh ) ctrl_cs, pg_sync, salert, scl, sda i oh = -5 ma 2.8 - - v setup time, smbus 100 - ns hold time, smbus 300 - ns note 1: see operating information section. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 5
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d 9.0 v, 33 a/297 w elect rical specification bmr 453 0000/002 t p1 = -40 to +90oc, v i = 36 to 75 v, sense pins connected to output pins unless otherwise s pecified under conditions. typical values given at: t p1 = +25c, v i = 53 v, max i o , unless otherwise specified under conditions. additional c out = 0.1 mf, configuration file: 190 10-cda 102 935/002 rev d characteristics conditions min typ max unit v i input voltage range 36 75 v v ioff turn-off input voltage decreasing input voltage 32 33 34 v v ion turn-on input voltage increasing input voltage 34 35 36 v c i internal input capacitance 18 f p o output power 0 297 w 50 % of max i o 96 max i o 95 50 % of max i o , v i = 48 v 96 efficiency max i o , v i = 48 v 95 % p d power dissipation max i o 15.5 24.7 w p li input idling power i o = 0 a, v i = 53 v 2.1 w p rc input standby power v i = 53 v (turned off with rc) 190 mw f s default switching frequency 0-100 % of max i o see note 1 133 140 145 khz v oi output voltage initial setting and accuracy t p1 = +25c, v i = 53 v, i o = 33 a 8.90 9.0 9.10 v output adjust range see operating information 8.1 13.2 v output voltage tolerance band 0-100% of max i o 8.82 9.18 v line regulation max i o 15 50 mv v o load regulation v i = 53 v, 1-100% of max i o 60 85 mv v tr load transient voltage deviation 0.3 v t tr load transient recovery time v i = 53 v, load step 25-75-25 % of max i o , di/dt = 1 a/ s, see note 2 250 s t r ramp-up time (from 10 ? 90 % of v oi ) 8 ms t s start-up time (from v i connection to 90% of v oi ) 10-100% of max i o, t p1 = 25oc, v i = 53 v see note 3 140 ms max i o 0.4 m s t f vin shutdown fall time (from v i off to 10% of v o ) i o = 0 a 8 s rc start-up time max i o 53 ms max i o 3.2 ms t rc rc shutdown fall time (from rc off to 10% of v o ) i o = 0 a 8 s i o output current 0 33 a i lim current limit threshold v o = 8.1v, t p1 < max t p1 34 38 43 a i sc short circuit current t p1 = 25oc, v o < 0.2v, see note 4 6 a c out recommended capacitive load t p1 = 25oc, see note 5 0.1 3.3 6 mf v oac output ripple & noise see ripple & noise section, max i o , v oi 50 120 mvp-p ovp over voltage protection t p1 = +25c, v i = 53 v, 10-100% of max i o , see note 6 15.6 v note 1: frequency may be adjusted via pmbus, see operating information section. note 2: cout = 3.3mf used at load transient test. note 3: start-up and ramp-up time can be increased via pmbus, see operation information section. note 4: rms current in hiccup mode. note 5: low esr-value. note 6: ovp-level can be adjusted via pmbus, see operation information. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 6
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d 9.0 v, 33 a/297 w elect rical specification bmr 453 0000/002 efficiency power dissipation 75 80 85 90 95 100 0 5 10 15 20 25 30 [a] [% ] 36 v 48 v 53 v 75 v 0 2 4 6 8 10 12 14 16 18 20 0 5 10 15 20 25 30 [a] [w] 36 v 48 v 53 v 75 v efficiency vs. load current and input voltage at t p1 = +25 c dissipated power vs. load current and input voltage at t p1 = +25c output current derating, open frame output current derating, base plate option 0 5 10 15 20 25 30 35 0 20406080100[c] [a] 3.0 m/s 2.0 m/s 1.0 m/s 0.5 m/s 0 5 10 15 20 25 30 35 0 20406080100[c] [a] 3.0 m/s 2.0 m/s 1.0 m/s 0.5 m/s available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. thermal resistance, base plate option 0 2 4 6 8 0.0 0.5 1.0 1.5 2.0 2.5 3.0 [m/s] [c/w] thermal resistance vs. airspeed measured at the converter. tested in wind tunnel with airflow and test conditions as per the thermal consideration section. v i = 53 v e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 7
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d 9.0 v, 33 a/297 w electrical specification bmr 453 0000/002 output characteristics current limit characteristics 8.80 8.90 9.00 9.10 9.20 0 5 10 15 20 25 30 [a] [v] 36 v 48 v 53 v 75 v 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 33 35 37 39 41 43 [a] [v] 36 v 48 v 53 v 75 v o utput voltage vs. load current at t p1 = +25c o utput voltage vs. load current at i o > max i o , t p1 = +25c start-up start-up shut-down start-up enabled by connecting v i at: t p1 = +25c, v i = 53 v, i o = 33 a resistive load. top trace: output voltage (5 v/div.). bottom trace: input voltage (50 v/div.). time scale: (50 ms/div.). shut-down enabled by disconnecting v i at: t p1 = +25c, v i = 53 v, i o =33 a resistive load. top trace: output voltage (2 v/div.). bottom trace: input voltage (50 v/div.). time scale: (0.2 ms/div.). output ripple & noise output load transient response output voltage ripple at: t p1 = +25c, v i = 53 v, i o = 33 a resistive load. trace: output voltage ( 0mv/div.). 2 time scale: (2 s/div.). output voltage response to load current step- change (8.25-24.75-8.2 a) at: 5 t p1 =+25c, v i = 53 v. top trace: output voltage (0.2 v/div.). bottom trace: output curr t (10a/div.). en time scale: (0.5 ms/div.). e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 8
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d 12.0 v, 33 a/396 w elec trical specification bmr 453 0000/001 t p1 = -40 to +90oc, v i = 36 to 75 v, sense pins connected to output pins unless otherwise s pecified under conditions. typical values given at: t p1 = +25c, v i = 53 v, max i o , unless otherwise specified under conditions. additional c out = 0.1 mf, configuration file: 190 10-cda 102 935/001 rev d characteristics conditions min typ max unit v i input voltage range 36 75 v v ioff turn-off input voltage decreasing input voltage 32 33 34 v v ion turn-on input voltage increasing input voltage 34 35 36 v c i internal input capacitance 18 f p o output power 0 396 w 50 % of max i o 96.5 max i o 95.5 50 % of max i o , v i = 48 v 96.5 efficiency max i o , v i = 48 v 95.5 % p d power dissipation max i o 18.3 27.1 w p li input idling power i o = 0 a, v i = 53 v 2.4 w p rc input standby power v i = 53 v (turned off with rc) 190 mw f s default switching frequency 0-100 % of max i o see note 2 133 140 145 khz v oi output voltage initial setting and accuracy t p1 = +25c, v i = 53 v, i o = 33 a 11.88 12.0 12.12 v output adjust range see operating information 8.1 13.2 v output voltage tolerance band 0-100% of max i o , see note 1 11.76 12.24 v line regulation max i o , see note 1 20 60 mv v o load regulation v i = 53 v, 1-100% of max i o , see note 1 60 90 mv v tr load transient voltage deviation 0.4 v t tr load transient recovery time v i = 53 v, load step 25-75-25 % of max i o , di/dt = 1 a/ s, see note 3 250 s t r ramp-up time (from 10 ? 90 % of v oi ) 8 ms t s start-up time (from v i connection to 90% of v oi ) 10-100% of max i o, t p1 = 25oc, v i = 53 v see note 4 140 ms max i o 0.4 m s t f vin shutdown fall time (from v i off to 10% of v o ) i o = 0 a 7 s rc start-up time max i o 53 ms max i o 3.2 ms t rc rc shutdown fall time (from rc off to 10% of v o ) i o = 0 a 7 s i o output current 0 33 a i lim current limit threshold v o = 10.8 v, t p1 < max t ref 34 38 43 a i sc short circuit current t p1 = 25oc, see note 5 - a c out recommended capacitive load t p1 = 25oc, see note 6 0.1 3.3 6 mf v oac output ripple & noise see ripple & noise section, max i o , see note 1 60 120 mvp-p ovp over voltage protection t p1 = +25c, v i = 53 v, 10-100% of max i o , see note 7 15.6 v note 1: vin = 40-75v , note 2: frequency may be adjusted with pmbus communication. see operating information section note 3: cout = 3.3mf used at load transient test. note 4: start-up and ramp-up time can be increased via pmbus, see operation information section. note 5: ocp in latch mode note 6: low esr-value note 7: ovp-level can be adjusted via pmbus, see operation information. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 9
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d 12.0 v, 33 a/396 w elec trical specification bmr 453 0000/001 efficiency power dissipation 75 80 85 90 95 10 0 0 5 10 15 2 0 2 5 3 0 [ a ] [%] 36 v 48 v 53 v 75 v 0 4 8 12 16 20 0 5 10 15 20 25 30 [a] [w] 36 v 48 v 53 v 75 v efficiency vs. load current and input voltage at t p1 = +25 c dissipated power vs. load current and input voltage at t p1 = +25c output current derating, open frame output current derating, base plate option 0 5 10 15 20 25 30 35 0 20406080100[c] [a] 3.0 m/s 2.0 m/s 1.0 m/s 0.5 m/s 0 5 10 15 20 25 30 35 0 20 40 60 80 100 [c] [a] 3.0 m/s 2.0 m/s 1.0 m/s 0.5 m/s available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. thermal resistance, base plate option 0 2 4 6 8 0.0 0.5 1.0 1.5 2.0 2.5 3.0[m/s] [c/w] thermal resistance vs. airspeed measured at the converter. tested in wind tunnel with airflow and test conditions as per the thermal consideration section. v i = 53 v, i o = 25 a e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 10
eandkul 2/1301-bmr 453 uen approved checked date rev reference eab/fjb/gmf (natalie johansson) (micjmal) 2009-04-27 d 12.0 v, 33 a/396 w electrical specification bmr 453 0000/001 output characteristics current limit characteristics 11. 8 0 11. 9 0 12 . 0 0 12 . 10 12 . 2 0 0 5 10 15 20 25 30 [a ] [v] 40 v 48 v 53 v 75 v 0.00 3.00 6.00 9.00 12 . 0 0 32 34 36 38 40 [a ] [v] 36 v 48 v 53 v 75 v o utput voltage vs. load current at t p1 = +25c the output voltage range is limited at 36v input voltage. o utput voltage vs. load current at i o > max i o , t p1 = +25c start-up shut-down start-up enabled by connecting v i at: t ref = +25c, v i = 53 v, i o = 33 a resistive load. top trace: output voltage (5 v/div.). bottom trace: input voltage (50 v/div.). time scale: (50 ms/div.). shut-down enabled by disconnecting v i at: t p1 = +25c, v i = 53 v, i o =33 a resistive load. top trace: output voltage (5 v/div.). bottom trace: input voltage (50 v/div.). time scale: (1 ms/div.). output ripple & noise output load transient response output voltage ripple at: t p1 = +25c, v i = 53 v, i o = 33 a resistive load. trace: output voltage (20mv/div.). time scale: (2 s/div.). output voltage response to load current step-change (8.25-24.75-8.25 a) at: t p1 =+25c, v i = 53 v, c o = 3.3mf. top trace: output voltage (0.2 v/div.). bottom trace: output current (10a/div.). time scale: (0.5 ms/div.). e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 11
emc specification conducted emi measured according to en55022, cispr 22 and fcc part 15j (see test set-up). see design note 009 for further information. the fundam ental switching frequency is 140 khz for bmr 453 @ v i = 53 v, max i o . conducted emi input terminal value (typ) emi without filter external filter (class b) suggested external input filter in order to meet class b in en 55022, cispr 22 and fcc part 15j. l1 c1 c2 c3 c4 c5 r - + module + - 0 0 l2 filter components: c1 = 1 + 1 f c2 = 1 + 1 f c3 = 220 f c4 = 2.2 nf c5 = 2.2 nf l1 = 0.81 mh l2 = 0.81 mh emi with filter test set-up layout recommendation the radiated emi performance of the product will depend on the pwb layout and ground layer design. it is also important to consider the stand-off of the product. if a ground layer is used, it should be connected to one of the output terminals and the equipment ground or chassis. a ground layer will increase the stray capacitance in the pwb and improve the high frequency emc performance. output ripple and noise output ripple and noise measured according to figure below. see design note 022 for detailed information. output ripple and noise test setup e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 12
operating information input voltage the input voltage range 36 to 75 vdc meets the requirements of the european telecom standard ets 300 132-2 for normal input voltage range in -48 and -60 vdc systems, -40.5 to -57.0 v and ?50.0 to -72 v respectively. at input voltages exceeding 75 v, the power loss will be higher than at normal input voltage and t p1 must be limited to absolute max +125c. the abs olute maximum continuous input voltage is 80 vdc. turn-off input voltage the product monitors the input voltage and will turn on and turn off at predetermined levels . the turn on and turn off level and the hysteresis in betwee n can be configured via the pmbus. the default hysteresis between turn on and turn off input voltage is set to 2 v. remote control (rc) the products are fitted with a configurable remote control function. the primary remote control is referenced to the primary negative input connection (-in). the rc function allows the converter to be turned on/off by an external device like a semiconductor or mechanical switch. the rc pin has an internal pull up resistor. the remote control functions can also be configured using the pmbus. the maximum required sink current is 1 ma. when the rc pin is left open, the voltage generated on the rc pin is max 6 v. the logic options for the primary remote control is configured using the pmbus. the default setting is negative logic. remote control (secondary side) the ctrl cs pin can be configured as remote control via the pmbus interface. in the default configuration the ctrl cs pin is disabled and the output has an internal pull-up to 3.3 v. the ctrl cs pin can be left open when not used. the logic options for the secondary remo te control can be positive or negative logic. input and output impedance the impedance of both the input source and the load will interact with the impedance of the product. it is important that the input source has low characteristic impedance. minimum recommended external input capacitance is 100 uf. the performance in some applications can be enhanced by addition of external capacitance as described under external decoupling capacitors. external decoupling capacitors when powering loads with significant dynamic current requirements, the voltage regulation at the point of load can be improved by addition of decoupl ing capacitors at the load. the recommended minimum capacitance on the output is 100 uf. the most effective technique is to locate low esr ceramic and electrolytic capacitors as close to the load as possible, using several parallel capacitors to lower the effective esr. the ceramic capacitors will handle high-frequency dynamic load changes while the electrolytic capacitors are used to handle low frequency dynamic load changes. ceramic capacitors will also reduce any high frequency noise across the load. it is equally important to use low resistance and low inductance pwb layouts and cabling. external decoupling capacitors will become part of the control loop of the product and may affect the stability margins. as a ?rule of thumb?, 100 f/a of output current can be added without any additional analysis. the esr of the capacitors is a very important parameter. power modules guarantee stable operation with a verified esr value of >10 m ? across the output connections. for further information please contact your local ericsson power modules representative. pmbus configuration and support the products provide a pmbus digital interface that enables the user to configure many aspec ts of the device operation as well as monitor the input and output parameters. please contact your local ericsson po wer modules representative for appropriate sw tools to down-load new configurations. output voltage adjust using pmbus the output voltage of the prod uct can be reconfigured using the pmbus interface. the outpu t voltage can be adjusted from 8.1 v to 13.2 v. margin up/down controls these controls allow the output voltage to be momentarily adjusted, either up or down, by a nominal 10%. this provides a convenient method for dynamic ally testing the operation of the load circuit over its supply margin or range. it can also be used to verify the function of supply voltage supervisors. the margin up and down levels of the product can be re- configured using the pmbus interface. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 13
operating information continued soft-start power up the soft-start control introduces a time-delay (default setting 40 ms) before allowing the output voltage to rise. the default rise time of the ramp up is 10 ms. power-up is hence completed within 50 ms in default configuration using remote control. when starting by appl ying input voltage the control circuit boot-up time adds an additional 100 ms delay. the soft- start power up of the product can be reconfigured using the pmbus interface. remote sense the products have remote sense that can be used to compensate for voltage drops between the output and the point of load. the sense traces should be located close to the pwb ground layer to reduce noise susceptibility. the remote sense circuitry will compensate for up to 10% voltage drop between output pins and the point of load. if the remote sense is not needed +sense should be connected to +out and -sense should be connected to -out. to be able to use remote sense the converter must be equipped with a digital connector. temperature protection (otp, utp) the products are protected fr om thermal overload by an internal temperature shutdown protection. when t p1 as defined in thermal consideration section is exceeded the product will shut down. the product will make continuous attempts to start up (non-latching mode) and resume normal operation automa tically when the temperature has dropped below the temperature threshold, the hysteresis is defined in general elec trical specification. the otp and hysteresis of the product can be re-configured using the pmbus interface. the product has also an under temperature protection. the ot p and utp fault limit and fault response can be configured via the pmbus. note: using the fault response ?continue without interruption? may cause permanent damage of the product. over voltage protection (ovp) the product has output over voltag e protection that will shut down the converter in over voltage conditions (latching mode) the ovp fault level and fault response can be re-configured using the pmbus interface. over current protection (ocp) the product includes current limiting circuitry for protection at continuous overload. the product will shut down if the max output current (max i o ) is exceeded and the output voltage is below 3.6 v. the load distribution should be designed for the maximum output short circuit current specified. the ocp level and fault response can be re-configured using the pmbus interface. the default configurat ion is set to hic-up mode for the over current protection. input over/under voltage protection the input of the product can be protected agains high input voltage and low input voltage. the over- and under-voltage fault level and fault response can be configured via the pmbus interface. pre-bias start-up the product has a pre-bias start up functionality and will not sink current during start up if a pre-bias source is present at the output terminals. power good the pg sync pin can be configured as an output (power good). the power good signal (t tl level) indicates proper operation of the product and can also be used as an error flag indicator. the pg sync pin has power good as default configuration with the output set as active low. the pg sync pin is configured via the pmbus interface. tracking and external reference the pg sync pin can be configured as an input for voltage tracking or an external analogue reference. the pg sync pin is configured via the pmbus interface and has default setting power good. switching frequency adjust using pmbus the switching frequency is set to 140 khz as default but this can be reconfigured via the pmbus interface. the product is optimized at this frequency but can run at lower and higher frequency, (125 khz ? 150 khz). however the output performance is not specified if the frequency is changed. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 14
pin designation function 1 +in positive input voltage 4 -in negative input voltage 5 -out negative output voltage 12 pg sync (in) slave sync signal (input) 12 pg sync (out) master sync signal (output) 15 ctrl cs (in) slave current share signal (input) 15 ctrl cs (out) master current share signal (output) 16 +out positive output voltage parallel operation two products can be directly connected in parallel for active current sharing. no external current sharing circuit are required. however both modules need to be pre-configured: one as a ?master? the other one as a ?slave?. the recommended configuration parame ters are presented in the table below. the slave module will be synchronized with the master via the pg_sync-pin and output current information will be sent to the slave via the ctrl cs-pin. frequency interleaving will be provided which will reduce the input line current ripple. the switching frequencies 125 khz, 140 khz and 150 khz, may be used in order to support synchronisation during current share mode. the same frequency should be selected on both paralleled products. the necessary electrical connections are showed in the figure. with a good pwb layout (equal trace resistances from each module to the connection point), the current sharing is very well balanced and both products are able to provide their full output current, i.e. t he total maximum output current is 2xi o max. during start-up (i.e. until both master and slave unit reach the requested output voltage) the load current must be limited to 33 a and the master must start-up before the slave. see table below for recommended master and slave configuration. when two products are parallele d the output voltage may be limited depending on input voltage and load current. the graphs below show examples of the maximum available output voltage vs. input volt age and output current. synchronization with frequency interleaving in order to reduce the input line current ripple, two products may be synchronized including frequency interleaving. similarly as in the parallel configuration one module must be configured as a master, the other one as a slave. only the sync signal should be provided from the master to the slave module. the same switching frequency restrictions as for the paralleling are valid. when the pg sync pin is configured as an input (sync in) the device will automatically check for a clock signal on the pg sync pin each time the module is enabled by rc or via pmbus. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 15
master and slave configuration for current share mode at 12 v output voltage code command default setting current share mode (master) default setting current share mode (slave) comment 0xf9 multi_pin_config 0xc0 0x60 configure the multi pin (pin 12) for master and slave. 0x60 ton_delay 0x0028 (40 ms) 0x0037 (55 ms) the slave must have a 15 ms start-up delay compared to the master if the converters shall start 0x35 vin_on 0x0022 (42 v) (for other output voltages see graph ?output voltage regulation?) 0x0023 (43 v) (for other output voltages see graph ?output voltage regulation?) 1 v higher turn on level for the slave. the slave regulation range is 1 v, from the initial start up point. 0x33 frequency_switch 0x008c ( 140 khz) 0x008c (140 khz) it is important that the same frequency is set in both master and slave, to be able to sync master and slave. output voltage regulation @ 33 a and 25c output voltage regulation @ 66 a and 25c 8.1 8.6 9.1 9.6 10.1 10.6 11.1 11.6 12.1 12.6 13.1 13.6 35 36 37 38 39 40 41 42 43 44 45 46 47 48 [vin, v] [vout, v] 8.1 8.6 9.1 9.6 10.1 10.6 11.1 11.6 12.1 12.6 13.1 13.6 35 36 37 38 39 40 41 42 43 44 45 46 47 48 [vin, v] [vout, v] output voltage regulation vs input voltage at: t p1 = +25c, i o = 33 a resistive load. (note 33 a is maximum load current at start-up) output voltage regulation vs input voltage at: t p1 = +25c, i o = 66 a resistive load. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 16
top view bottom view (base plate version) thermal consideration general the products are designed to operate in different thermal environments and sufficient cooling must be provided to ensure reliable operation. for products mounted on a pwb without a heat sink attached, cooling is achieved mainly by conduction, from the pins to the host board, and convection, which is dependant on the airflow across the product. increased ai rflow enhances the cooling of the product. the output current derating graph found in the output section for each model provides the available output current vs. ambient air temperature and air velocity at v i = 53 v. the product is tested on a 254 x 254 mm, 35 m (1 oz), 8-layer test board mounted vertically in a wind tunnel with a cross-section of 608 x 203 mm. definition of product operating temperature the product operating temperatur es is used to monitor the temperature of the product, and proper thermal conditions can be verified by measuring the tem perature at positions p1, p2, p3. the temperature at these positions (t p1 , t p2 , t p3 ) should not exceed the maximum temperatures in the table below. the number of measurement points may vary with different thermal design and topology. temperatures above maximum t p1 , measured at the reference point p1 (p3 for base plate versions) are not allowed and may cause permanent damage. position description max temperature p1 pwb (reference point) t p1 =125o c p3 pwb (reference point for base- plate version) t p1 =125o c p2 opto-coupler t p2 =105o c ambient temperature calculation for products with base plate the maximum allowed ambient temperature can be calculated by using the thermal resistance. 1. the power loss is calculated by using the formula ((1/ ) - 1) output power = power losses (pd). = efficiency of product. e.g. 95% = 0.95 2. find the thermal resistance (rth) in the thermal resistance graph found in the output section for each model. note that the thermal resistance can be significantly reduced if a heat sink is mounted on the top of the base plate. calculate the temperature increase ( t). t = rth x pd 3. max allowed ambient temperature is: max t p1 - t. e.g. bmr 453 5100/ 001 at 2 m/s: 1. (( ) - 1) 396 w = 23.5 w 2. 23.5 w 3.1c/w = 73c 3. 125 c ? 73c = max ambient temperature is 52c the actual temperature will be dependent on several factors such as the pwb size, number of layers and direction of airflow. 1 0.944 e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 17
connections (top view) pin designation function 1 +in positive input 2 rc remote control 3 case case to gnd (optinal) 4 -in negative input 5 -out negative output 6 s+ positive remote sense 7 s- negative remote sense 8 sa0 address pin 0 9 sa1 address pin 1 10 scl pmbus clock 11 sda pmbus data 12 pg sync configurable i/o pin: power good output, sync-, tracking-, or ext ref-input 13 dgnd pmbus ground 14 salert pmbus alert signal 15 ctrl cs pmbus remote control or current share 16 +out positive output e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 18
pmbus communications the products provide a pmbus digital interface that enables the user to configure many aspec ts of the device operation as well as monitor the input and output parameters. the products can be used with any standard two-wire i 2 c or smbus host device. in addition, the device is compatible with pmbus version 1.1 and includes an salert line to help mitigate bandwidth limitations related to continuous fault monitoring. monitoring via pmbus a system controller can monitor a wide variety of different parameters through the pmbus in terface. the controller can monitor for fault condition by monitoring the salert pin, which will be asserted when any number of pre-configured fault or warning conditions occu r. the system controller can also continuously monitor for any number of power conversion parameters including but not limited to the following: ? input voltage ? output voltage ? output current ? internal junction temperature ? switching frequency ? duty cycle evaluation software a configuration monitori ng and management (cmm) evaluation software, is available for the products. for more information please contact your local ericsson power modules sales representative. addressing the figure and table below show recommended resistor values with min and max voltage range for hard-wiring pmbus addresses (series e96, 1% tolerance resistors suggested): sa0/sa1 r 1 /r 0 [k ] min voltage[v] max voltage[v] 0 24.9 0.261 0.438 1 49.9 0.524 0.679 2 75 0.749 0.871 3 100 0.926 1.024 4 124 1.065 1.146 5 150 1.187 1.256 6 174 1.285 1.345 7 200 1.371 1.428 the sa0 and sa1 pins can be configured with a resistor to gnd according to the following equation. pmbus address = 8 x (sa0value) + (sa1 value) if any one of those voltage applied to adc0 and adc1 is out of the range from the table above, pmbus address 127 is assigned. if the calculated pmbus address is 0 or 12, pmbus address 127 is assigned instead. pmbus address 11 is not to be used. the user shall also be aware of further limitations of the addresses as stated in th e pmbus specification. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 19
pmbus commands the dc/dc converter is pmbus compliant. the following table lists the implemented pmbus commands. for more detailed information see pmbus power system management protocol specification; part i ? gener al requirements, transport and electrical interface and pmbus power system management protocol; part ii ? command language. designation cmd impl standard pmbus commands control commands page 00h no operation 01h yes on_off_config 02h yes write_protect 10h yes output commands vout_mode 20h yes vout_command 21h yes vout_trim 22h yes vout_gain 23h yes vout_max 24h yes vout_margin_high 25h yes vout_margin_low 26h yes vout_transition_rate 27h yes vout_droop 28h no vout_scale_loop 29h yes vout_scale_monitor 2ah yes coefficients 30h no pout_max 31h no max_duty 32h yes frequency_switch 33h yes vin_on 35h yes vin_off 36h yes iout_cal_gain 38h yes iout_cal_offset 39h yes fault limit commands power_good_on 5eh yes power_good_off 5fh yes vout_ov_fault_limit 40h yes vout_uv_fault_limit 44h yes iout_oc_fault_limit 46h yes iout_oc_lv_fault_limit 48h yes iout_uc_fault_limit 4bh no ot_fault_limit 4fh yes designation cmd impl ot_warn_limit 51h yes ut_warn_limit 52h yes ut_fault_limit 53h yes vin_ov_fault_limit 55h yes vin_ov_warn_limit 57h yes vin_uv_warn_limit 58h yes vin_uv_fault_limit 59h yes vout_ov_warn_limit 42h yes vout_uv_warn_limit 43h yes iout_oc_warn_limit 4ah yes iin_oc_fault_limit 5bh no iin_oc_warn_limit 5dh no fault response commands vout_ov_fault_response 41h yes vout_uv_fault_response 45h yes ot_fault_response 50h yes ut_fault_response 54h yes vin_ov_fault_response 56h yes vin_uv_fault_response 5ah yes iout_oc_fault_response 47h yes iout_uc_fault_response 4ch no iin_oc_fault_response 5ch no time setting commands ton_delay 60h yes ton_rise 61h yes ton_max_fault_limit 62h yes ton_max_fault_response 63h yes toff_delay 64h yes toff_fall 65h yes toff_max_warn_limit 66h yes status commands (read only) clear_faults 03h yes status_bytes 78h yes status_word 79h yes status_vout 7ah yes status_iout 7bh yes status_input 7ch yes status_temperature 7dh yes status_cml 7eh yes status_other 7fh yes monitor commands (read only) read_vin 88h yes e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 20
designation cmd impl read_vout 8bh yes read_iout 8ch yes read_temperature_1 8dh yes read_temperature_2 8eh yes read_fan_speed_1 90h no read_duty_cycle 94h yes read_frequency 95h yes read_pout 96h no read_pin 97h no identification commands (read only) pmbus_revision 98h yes mfr_id 99h yes mfr_model 9ah yes mfr_revision 9bh yes mfr_location 9ch yes mfr_date 9dh yes mfr_serial 9eh yes group commands interleave 37h no supervisory commands store_default_all 11h yes restore_default_all 12h yes store_user_all 15h yes restore_user_all 16h yes bmr 453 specific commands mfr_power_good_polarity d0h yes mfr_vout_upper_resistor d2h yes mfr_vin_scale_monitor d3h yes mfr_cla_table_num_row d4h yes mfr_cla_row_coefficients d5h yes mfr_store_cla_table d6h yes mfr_active_coeff_cla_table d8h yes mfr_select_temp_sensor dch yes mfr_vin_offset ddh yes mfr_remote_temp_cal e2h yes mfr_remote_control e3h yes mfr_dead_band_mode e4h yes mfr_dead_band_delay e5h yes mfr_temp_coeff e7h yes mfr_vout_analog_scale e8h yes mfr_read_vout_analog_ref e9h yes mfr_debug_buff f0h yes designation cmd impl mfr_setup_password f1h yes mfr_disable_security f2h yes mfr_dead_band_iout_threshold f3h yes mfr_security_bit_mask f4h yes mfr_primary_turn f5h yes mfr_secondary_turn f6h yes mfr_set_dpwm_polarity f7h yes mfr_ilim_softstart f8h yes mfr_multi_pin_config f9h yes mfr_dead_band_vin_threshold fah yes mfr_dead_band_vin_iout_hys fbh yes mfr_firmeware_version fch yes mfr_message_code_device_id fdh yes notes: cmd is short for command. impl is short for implemented. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 21
epetsch 4/1301 bmr 453 uen approved checked date rev reference eab/fjb/gmf [g eriksson] see 1 2009-04-15 d mechanical information - hole mount, open frame version all component placements ? whether shown as physical components or symbolical outline ? are for reference only and are subject to change throughout the product?s life cycle, unless explicitly described and dimensioned in this drawing. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 22
mechanical information- hole mount, base plate version all component placements ? whether shown as physical components or symbolical outline ? are for reference only and are subject to change throughout the product?s life cycle, unless explicitly described and dimensioned in this drawing. e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 23
soldering information ? hole mounting the hole mounted product is intended for plated through hole mounting by wave or manual soldering. the pin temperature is specified to maximum to 270c for maximum 10 seconds. a maximum preheat rate of 4c/s and maximum preheat temperature of 150c is sugges ted. when soldering by hand, care should be taken to avoid direct contact between the hot soldering iron tip and the pins for more than a few seconds in order to prevent overheating. a no-clean flux is recommended to avoid entrapment of cleaning fluids in cavities inside the product or between the product and the host board. the cleaning residues may affect long time reliability and isolation voltage. delivery package information the products are delivered in antistatic trays. tray specifications material pe foam, dissipative surface resistance 10 5 to 10 12 ohms/square tray capacity 20 converters/tray box capacity 20 converters weight product - open frame 1100 g full tray, 140 g empty tray product ? base plate option 1480 g full tray, 140 g empty tray e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 24
product qualification specification characteristics external visual inspection ipc-a-610 change of temperature (temperature cycling) iec 60068-2-14 na temperature range number of cycles dwell/transfer time -40 to 100c 1000 15 min/0-1 min cold (in operation) iec 60068-2-1 ad temperature t a duration -45c 72 h damp heat iec 60068-2-67 cy temperature humidity duration 85c 85 % rh 1000 hours dry heat iec 60068-2-2 bd temperature duration 125c 1000 h electrostatic discharge susceptibility iec 61340-3-1, jesd 22-a114 iec 61340-3-2, jesd 22-a115 human body model (hbm) machine model (mm) class 2, 2000 v class 3, 200 v immersion in cleaning solvents iec 60068-2-45 xa, method 2 water glycol ether isopropyl alcohol 55c 35c 35c mechanical shock iec 60068-2-27 ea peak acceleration duration 100 g 6 ms moisture reflow sensitivity 1 j-std-020c level 1 (snpb-eutectic) level 3 (pb free) 225c 260c operational life test mil-std-202g, method 108a duration 1000 h resistance to soldering heat 2 iec 60068-2-20 tb, method 1a solder temperature duration 270c 10-13 s robustness of terminations iec 60068-2-21 test ua1 iec 60068-2-21 test ue1 through hole mount products surface mount products all leads all leads solderability iec 60068-2-58 test td 1 iec 60068-2-20 test ta 2 preconditioning temperature, snpb eutectic temperature, pb-free preconditioning temperature, snpb eutectic temperature, pb-free 150c dry bake 16 h 215c 235c steam ageing 235c 245c vibration, broad band random iec 60068-2-64 fh, method 1 frequency spectral density duration 10 to 500 hz 0.07 g 2 /hz 10 min in each direction notes 1 only for products intended for reflow soldering (surface mount products) 2 only for products intended for wave soldering (plated through hole products) e bmr 453 series dc/dc converters, input 36-75 v, output up to 33 a / 396 w en/lzt 146 395 r2b march 2010 ? ericsson ab technical speci?cation 25

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