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p/n 7q00h5wb000 date: 06/03/03 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 1 magnetek peg web site, www.magnetekpower.com h h h e e e q q q b b b - - - 2 2 2 5 5 5 a a a - - - 4 4 4 8 8 8 v v v - - - 3 3 3 . . . 3 3 3 v v v 4 4 8 8 v v i i n n 2 2 5 5 a a o o u u t t 3 3 . . 3 3 v v o o u u t t , , d d c c - - d d c c c c o o n n v v e e r r t t e e r r h h i i g g h h e e f f f f i i c c i i e e n n c c y y , , i i s s o o l l a a t t e e d d q q u u a a r r t t e e r r b b r r i i c c k k f f f e e e a a a t t t u u u r r r e e e s s s ? very high efficiency: 91% ? wide input voltage range (36 to 75vdc) ? low profile, industry st andard footprint and pin out: 2.3" x 1.45" x 0. 36" (58.4mm x 36.8mm x 9.35mm) ? total weight: 34g. (1.2oz.) ? remote on/off ? output voltage trim ? i ndustry standard trim equation ? remote sense ? fixed frequency (input -output ripple 400 khz) ? under voltage lockout (uvl o), input ? auto recover ? over voltage protection ? auto recover ? over current protection ? auto recover ? over temperature protection ? auto recover ? operating temperature range: -40c to +100c ? input to output is olation at 2000vdc, 10m ? ? ul/ c ul, csa/csa us , tuv and kema certified ? iso 9001 certified manufacturing processes p p p r r r o o o d d d u u u c c c t t t h h h i i i g g g h h h l l l i i i g g g h h h t t t s s s ? heqb family of dc-dc converters is magnetek?s solution for next generation, cutting-edge board applications. ? synchronous rectification uses mosfet instead of schottky diodes providing extreme reduction in heat generation, boosting efficiency, eliminating the need for a heat sink and increased reliability. ? low profile (0.36?), open frame construction allows smaller card pitch and improves system ventilation. ? fixed switching frequency provides predictable emi characteristics.
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 2 magnetek peg web site, www.magnetekpower.com m m m e e e c c c h h h a a a n n n i i i c c c a a a l l l d d d r r r a a a w w w i i i n n n g g g s s s - all dimensions are in inches (mm) tolerances: x.xx in. +/-0.2 in. (0.5mm) pinout description pin name function 1 vin (-) negative terminal for the input bus 2 on/off external input signal, ttl. output voltage on or off 3 vin (+) positive terminal for the input bus 4 vout (+) positive terminal for output voltage 5 sense (+) positive remote sense 6 trim output voltage trim 7 sense (-) negative remote sense 8 vout (-) return terminal for output voltage 1.45 (36.83) 2.01 (51) 0.14 (3.68) 2.3 (58.42) 0.42 (10.8) 0.42 (10.8) 0.15x4 (3.81x4). 0.3 (7.62) 0.36 (9.35) 0.15 (4) 0.3 (7.62) ?=0.06 (2 pcs) (?=1.5) (2 pcs) ?=0.04 (6 pcs) (?=1) (6 pcs) bottom view
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 3 magnetek peg web site, www.magnetekpower.com s s s p p p e e e c c c i i i f f f i i i c c c a a a t t t i i i o o o n n n s s s (typical value standard at nominal input line, full load, airf low 300 lfm, 25c ambient temper ature unless otherwise specified) input characteristics notes & conditions min typ max units operating input voltage range note 1 36 48 75 v input surge voltage t< 10 s 100 v input under-voltage lockout turn-on voltage threshold 34.3 34.8 35.4 v turn-off voltage threshold 33.8 34.3 34.8 v lockout hysteresis voltage 0.4 0.5 0.6 v maximum input current v in =36v; full load 2.59 a no-load input current 75 100 ma off converter input current 4 6 ma inrush current transient rating 0.01 a 2 s input reflected-ripple current rms; see figures 1, 2 3 ma n n n o o o t t t e e e 1 1 1 : : : absolute max. input voltage 80v output characteristics notes & conditions min typ max units output voltage set point 50 % load 3.28 3.30 3.32 v output voltage regulation load v nom = 48v 5 8 mv line i o = 15a 2 5 mv temperature 15 30 mv total output voltage range 3.265 3.335 v output voltage ripple and noise 20 mhz bandwidth peak to peak 60 100 mv rms full load, see figures 1, 4 14 20 mv operating output current range i o, see figures 12, 13 0 - 25 a output dc current limit inception 26 27 29 a output dc current limit shutdown voltage see figure 5 2.75 2.88 3.05 v admissible output capacitance full load, resistive 0 20000 f dynamic characteristics notes & conditions min typ max units output voltage current transient 470 f load cap, 1a/ s; figures 8, 9 positive step change 50%i o to 75% i o 170 mv negative step change 75% i o to 50% i o 170 mv settling time to 1% 300 s turn-on transient figures 6 and 7 overshoot 0 % turn-on time full load 15 20 ms start-up inhibit period 120 ms efficiency notes & conditions min typ max units 100% load v in = 48v 90.5 % 80% load v in = 48v 91.0 % 56% load v in = 48v 90.5 % isolation characteristics notes & conditions min typ max units isolation voltage - input to output basic isolation 2000 v dc isolation capacitance basic isolation 2200 pf isolation resistance 10 m ?
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 4 magnetek peg web site, www.magnetekpower.com figure 2 - cerami c cap esr ic dc/dc converter vout is - figure 4 figure 3 feature characteristics min. typ. max units switching frequency double frequency for input-output ripple 190 200 210 khz on/off control off-state voltage 2.7 10 v on-state voltage 0 0.5 v output voltage trim range -10 +10 % output voltage remote sense range +10 % over voltage protection threshold 115 125 130 % over current protection threshold 26-35 a over temperature protection threshold average pcb temperature 120 125 c general characteristics notes & conditions min typ max units operating range temperature maximum rating -40 +100 c storage temperature maximum rating -50 +120 c relative humidity non condensing 5 95 % calculated mtbf bellcore issue 4 rdf93 hrd issue 5 min. 1,500,000 hours safety and regulatory tuv and kema certified for basic insula tion compliance to en06950 requirements ul and csa 22.2 no. 950-95(us and canada) certified with basic insulation for compliance to ul60950. note : an external input fuse must always be used for compliance to listed safety requirements. ce compliant per 72/23/eec (low voltage directive) and 93/68/eec to facilitate ce mark at system level. material flammability rating, ul94v-0 nebs compliant c c c h h h a a a r r r a a a c c c t t t e e e r r r i i i s s s t t t i i i c c c c c c u u u r r r v v v e e e s s s figure 1: set-up diagram showing measurement points for: input terminal ripple curr ent, input reflected ripple current and output voltage ripple
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 5 magnetek peg web site, www.magnetekpower.com figure 3: input terminal ripple current, set-up per figure 1, 10 h source impedance and 47 f electrolytic capacitor nominal input voltage at full rated load. figure 2: input reflected ripple current, set-up per figure 1; 10 h source impedance. nominal input voltage at full rated load. figure 5: load current as a function of time while attempting to enable into a short circuit, <10m ? . figure 4: output voltage ripple, set-up per figure 1, 1 f ceramic capacitor and 10 f tantalum capacitor. nominal input voltage at full rated load
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 6 magnetek peg web site, www.magnetekpower.com figure 6: turn-on transient at full rated load. upper trace: input voltage. lower trace: output voltage figure 7: turn-on transient at zero load. upper trace: input voltage lower trace: output voltage figure 8: output voltage response to dynamic change in load current: 75% i o to 50%i o , where: di / dt = 0.1a / s load cap: 10 f, 100 m ? esr tantalum capacitor and 1 f ceramic capacitor figure 9: output voltage response to step-change in load current. 50%i o to 75% i o , where: di / dt = 1a / s load cap: 470 f, 30 m ? esr tantalum capacitor and 1 f ceramic capacitor
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 7 magnetek peg web site, www.magnetekpower.com figure 10: efficiency vs. load current for listed input voltages at 25c figure 11 : power dissipation vs. load current for listed input voltages at 25c 70 75 80 85 90 95 4 6 8 1012141618202225 output current [a] efficiency % vin= 36v vin= 48v vin= 75v 0 2 4 6 8 10 12 4 6 8 10 12 14 16 18 20 22 25 output current [a] power dissipation [w] vin= 36v vin= 48v vin= 75v
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 8 magnetek peg web site, www.magnetekpower.com figure 12: maximum output power derating curves vs. ambient air temperature for airflow rates of 100 lfm through 400 lfm with air flowing across the converter from pin 1 to pin 3 (transversal) at nominal input voltage. 0 5 10 15 20 25 0 2540557085 amb ie n t air te mp e r at u r e ( c) iout (a) 400 lfm 300 lfm 200lfm 100 lfm figure 13: maximum output current derating curves vs. ambient air temperature. airflow rates of 0 lfm through 400 lfm with air flowing lengthwise from output to input at nominal input voltage. 0 5 10 15 20 25 0 2540557085 amb i e n t ai r t e mp e r at u r e ( c ) iout (a) 400 lfm 300 lfm 200lfm 100 lfm 0 lfm
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 9 magnetek peg web site, www.magnetekpower.com f f f e e e a a a t t t u u u r r r e e e s s s a a a n n n d d d p p p i i i n n n s s s d d d e e e s s s c c c r r r i i i p p p t t t i i i o o o n n n remote on-off control the default logic is negative, where the remote on/off (pin 2) input is referenced to -vin (pin 1). the remote on/off signal must be lower than 0.8v to enable the output volt age, and higher than 2.7v to disable the output voltage. positive logic is an available option, a dd ??p? to the end of the ordering code. trim the output voltage can be trimmed by means of an external resistor connected between trim (pin 6) and +sense (pin 5) or -sense (pin 7). the selection of the resistor follows the industry standard trim equation. an external resistor connected between trim and ?sense pi ns will decrease the output voltage. for a decrease of ? % of the nominal output voltage, calculate the value of the external resistor using the following equation: r trim-down = ? ? ? ? ? ? ? ? ? k 22 . 10 % 511 where ? = % 100 ? ? ? ? ? ? ? ? ? 3.3 v 3.3 target on /off vin (-) direct logic drive on /off vin (-) negative logic (permanently enabled) on /off vin (-) remote enable circuit vin (-) vin (-) open collector enable circuit
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 10 magnetek peg web site, www.magnetekpower.com an external resistor connected between trim and +sense pins will increase the output voltage. for an increase of ? % of the nominal output voltage, calculate the value of the external resistor using the following equation: r trim-up = () ? ? ? ? ? ? ? ? ? ? ? ? ? ? + k 22 . 10 % 511 % 225 . 1 % 100 3 . 3 * 11 . 5 sense (+ or - ) the +sense or ?sense pins must be connected to the load or output pins of the converter. to ensure tight regulation at the system critical load, t hen the remote sense pins should be connected to the system critical load. reference applicable section of data sheet for maximum voltage compensation. ensure sufficient margin to the over voltage threshold, review applicable sections of the data sheet and system loading: output over-voltage protection ?v s- system transient load condition(s).
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 11 magnetek peg web site, www.magnetekpower.com thermal considerations t he converter has internal thermal protection preventi ng hot spots on pcb from exceeding mfr?s recommended temperatures for reliable operation, refe rence over temperature protection thres hold (section: feature characteristics). margin to the temperature protection limit should be verified in the application, and should not exceed 120 c on the thermal reference points as shown in figure 14. during an abnormal condition inducing an increase in the converter temperature, the co nverter output voltage will fold back when the over temperature protecti on threshold is reached. the converter will auto-recover when the fault condition is corrected and time allowed for the converter to cool down. figure 14, thermal reference points over current protection the overcurrent limit inception is typi cally 110% of the rated output current. when the overcurrent limit inception is exceeded the output voltage will decrease proportional to the increase in the load current. further increase in the load current will cause the output voltage to trip the under voltage protection threshold and enter fault protection, or hiccup reference figure 5. the converter will enter fault protecti on typically at 125% of rated output current. when the fault is removed the converte r will auto recover. q9 q4
heqb?25a?48v?3.3v p/n 7q00h5wb000 ds heqb 25a 48v 3-3v_7q00_030603 rev 4a ? page 12 magnetek peg web site, www.magnetekpower.com o o o r r r d d d e e e r r r i i i n n n g g g c c c o o o d d d e e e family code rated output current input voltage output voltage option 1- remote on/off logic option 2- mechanical option 3- pin length heqb 25a 48v 3.3v default ? negative logic p ? positive logic default ? open frame pl ? cold plate default ? 0.15? 1 ? 0.25? 2 ? 0.11? 3 ? 0.18? example: heqb-25a-48v-3.3v-ppl1, standard quarter bri ck with positive logic, cold plate, and 0.25? pin length. europe magnetek s.p.a via s.giorgio 642 52028- terranuova bracciolini, arezzo, italy phone: (+39) 055.9195.1 fax: (+39) 055.9195.248 us magnetek peg 8966 mason avenue chatsworth, ca 91311, usa phone: (+1) 818.727.2216 fax: (+1) 818.727.2276 toll-free number: (+1) 800.621.0733

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