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delphi series s48sp, 36w 1x1 brick dc/dc power modules: 48v in, 12v/3a out the delphi series s48sp, 1x1 brick, 48v input, single output, isolated dc/dc converters is the latest offering from a world leader in power systems technology and manufacturing -- delta electronics, inc. this product family is available in a surface mount or through-hole package and provides up to 36 watts of power or 10a of output current (3.3v and below) in a new 1x1 form factor (1.3?x0.96?x0.33?). the pinout is compatible with the industry standard 1x2 products. with creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. typical efficiency of the 12v/3a module is better than 90%. all modules are fully protected against abnormal input/output voltage, current, and temperature conditions. options ? smd module available ? remote on/off ? otp and output ovp, ocp mode, auto-restart (default) or latch-up ? short pin lengths ? encapsulated case optional datasheet ds_s48sp12003_10252013 applications ? optical transport ? data networking ? communications, including wireless and traditional telecom ? servers features ? high efficiency: 90% @ 12v/3a ? industry standard 1x2 pinout ? size: 33.0 x 24.4 x 8.55 mm (1.30?x0.96?x0.34?) ? smd and through-hole versions ? fixed frequency operation ? 2:1 input voltage range ? input uvlo, ovp ? otp and output ocp, ovp (default is auto-restart) ? output voltage trim 10% ? monotonic startup into normal and pre-biased loads ? 2250v isolation and basic insulation ? no minimum load required ? iso 9001, tl 9000, iso 14001, qs9000, ohsas18001 certified manufacturing facility ? ul/cul 60950 (us & canada) recognized
ds_s48sp12003_10252013 2 technical specifications (t a =25c, airflow rate=300 lfm, v in =48vdc, nominal vout unless otherwise noted.) parameter notes and conditions s48sp12003 (standard) min. typ. max. units absolute maximum ratings input voltage continuous 80 vdc transient(100ms) 100ms 100 vdc operating temperature refer to figure 20 for the measuring point -40 113 c storage temperature -55 125 c input/output isolation voltage 2250 vdc input characteristics operating input voltage 36 75 vdc input under-voltage lockout turn-on voltage threshold 32.5 34 35.5 vdc turn-off voltage threshold 30.5 32 33.5 vdc lockout hysteresis voltage 1.0 2 3.0 vdc maximum input current 100% load, 36vin 1.1 a no-load input current 40 ma off converter input current 10 ma inrush current (i 2 t) 0.01 a 2 s input reflected-ripple current p-p thru 12h inductor, 5hz to 20mhz 10 ma input voltage ripple rejection 120 hz 60 db output characteristics output voltage set point vin=48v, io=io.max, tc=25c 11.82 12 12.18 vdc output voltage regulation over load io=io, min to io, max 3 10 mv over line vin=36v to 75v 3 10 mv over temperature tc=-40c to 100c 120 mv total output voltage range over load, line and temperature 11.64 12.36 v output voltage ripple and noise 5hz to 20mhz bandwidth peak-to-peak full load, 1f ceramic, 10f tantalum 30 mv rms full load, 1f ceramic, 10f tantalum 5 mv operating output current range 0 3 a output dc current-limit inception output voltage 10% low 110 140 % dynamic characteristics output voltage current transient 48v, 10f tan & 1f ceramic load cap, 0.1a/s positive step change in output current 50% io.max to 75% io.max 200 mv negative step change in output current 75% io.max to 50% io.max 200 mv settling time (within 1% vout nominal) 50 us turn-on transient start-up time, from on/off control 15 ms start-up time, from input 15 ms maximum output capacitance full load; 5% overshoot of vout at startup 470 f efficiency 100% load 90.0 % 60% load 90.0 % isolation characteristics input to output 2250 vdc isolation resistance 10 m ? isolation capacitance 1000 pf feature characteristics switching frequency 400 khz on/off control, negative remote on/off logic logic low (module on) von/off -0.7 0.8 v logic high (m odule off) von/off 2 18 v on/off control, positive remote on/off logic logic low (module off) von/off -0.7 0.8 v logic high (m odule on) von/off 2 18 v on/off current (for both remote on/off logic) ion/off at von/off=0.0v 0.25 ma leakage current (for both remote on/off logic) logic high, von/off=15v 30 ua output voltage trim range across trim pin & +vo or ?vo, pout ?? max rated -10% 10% % output over-voltage protection over full temp range; % of nominal vout 13.8 16.8 v general specifications mtbf io=80% of io, max; ta=25c; air flow 300lfm 3.24 m hours weight 10.5 grams over-temperature shutdown refer to figure 20 for the measuring point 118 c
ds_s48sp12003_10252013 3 electrical characteristics curves figure 1: efficiency vs. load current for minimum, nominal, and maximum input voltage at 25c figure 2: power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 3: typical full load input characteristics at room temperature
ds_s48sp12003_10252013 4 electrical characteristics curves for negative remote on/off logic figure 4: turn-on transient at full rated load current (5 ms/div). vin=48v. top trace: vout, 5.0v/div; bottom trace: on/off input,2v/div figure 5: turn-on transient at zero load current (5ms/div). vin=48v. top trace: vout, 5.0v/div, bottom trace: on/off input, 2v/div for positive remote on/off logic figure 6: turn-on transient at full rated load current (5 ms/div). vin=48v. top trace: vout, 5.0v/div; bottom trace: on/off input,2v/div figure 7: turn-on transient at zero load current (5ms/div). vin=48v. top trace: vout, 5.0v/div; bottom trace: on/off input, 2v/div 0 0 0 0 0 0 0 0
ds_s48sp12003_10252013 5 electrical characteristics curves figure 8: output voltage response to step-change in load current (75%-50% of io, max; di/dt = 0.1a/s). load cap: 10f tantalum capacitor and 1f ceramic capacitor. top trace: vout (200mv/div, 50us/div), bottom trace: iout (0.5 a /div). scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module figure 9: output voltage response to step-change in load current (50%-75% of io, max; di/dt = 0.1a/s). load cap: 10f tantalum capacitor and 1f ceramic capacitor. top trace: vout (200mv/div, 50us/div), bottom trace: iout (0.5 a /div). scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module figure 10: test set-up diagram showing measurement points for input terminal ripple current and input reflected ripple current. note: measured input reflected-ripple current with a simulated source inductance (l test ) of 12 h. capacitor cs offset possible battery impedance. measure current as shown below 0 0 0 0
ds_s48sp12003_10252013 6 electrical characteristics curves figure 11: input terminal ripple current, i c , at full rated output current and nominal input voltage with 12h source impedance and 33f electrolytic capacitor (100ma/div, 1us/div) figure 12: input reflected ripple current, i s , through a 12h source inductor at nominal input voltage and rated load current (20 ma/div, 1us/div) strip copper vo(-) vo(+) 10u 1u scope resistiv e load figure 13: output voltage noise and ripple measurement test setup figure 14: output voltage ripple at nominal input voltage and rated load current (io=3a)(20 mv/div, 1us/div) load capacitance: 1f ceramic capacitor and 10f tantalum capacitor. bandwidth: 20 mhz. scope measurements should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module figure 15: output voltage vs. load current showing typical current limit curves and converter shutdown points 0 0 0
ds_s48sp12003_10252013 7 design considerations input source impedance the impedance of the input source connecting to the dc/dc power modules will interact with the modules and affect the stability. a low ac-impedance input source is recommended. if the source inductance is more than a few h, we advise adding a 10 to 100 f electrolytic capacitor (esr < 0.7 ? at 100 khz) mounted close to the input of the module to improve the stability. layout and emc considerations delta?s dc/dc power modules are designed to operate in a wide variety of systems and applications. for design assistance with emc compliance and related pwb layout issues, please contact delta?s technical support team. an external input filter module is available for easier emc compliance design. application notes to assist designers in addressing these issues are pending to release. safety considerations the power module must be installed in compliance with the spacing and separation requirements of the end-user?s safety agency standard, i.e., ul60950, can/csa-c22.2 no. 60950-00 and en60950:2000 and iec60950-1999, if the system in which the power module is to be used must meet safety agency requirements. basic insulation based on 75 vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this dc-to-dc converter is identified as tnv-2 or selv. an additional evaluation is needed if the source is other than tnv-2 or selv. when the input source is selv circuit, the power module meets selv (safety extra-low voltage) requirements. if the input source is a hazardous voltage which is greater than 60 vdc and less than or equal to 75 vdc, for the module?s output to meet selv requirements, all of the following must be met: ? the input source must be insulated from the ac mains by reinforced or double insulation. ? the input terminals of the module are not operator accessible. ? if the metal baseplate is grounded , one vi pin and one vo pin shall also be grounded. ? a selv reliability test is conducted on the system where the module is used , in combination with the module, to ensure that under a single fault, hazardous voltage does not appear at the module?s output. when installed into a class ii equipment (without grounding), spacing consideration should be given to the end-use installation, as the spacing between the module and mounting surface have not been evaluated. the power module has extra-low voltage (elv) outputs when all inputs are elv. this power module is not internally fused. to achieve optimum safety and system protection, an input line fuse is highly recommended. the safety agencies require a fuse with 3a maximum rating to be installed in the ungrounded lead. a lower rated fuse can be used based on the maximum inrush transient energy and maximum input current. soldering and cleaning considerations post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. for assistance on appropriate soldering and cleaning procedures, please contact delta?s technical support team.
ds_s48sp12003_10252013 8 features descriptions over-current protection the modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. if the output current exceeds the ocp set point, the modules will automatically shut down, and enter hiccup mode or latch mode, which is optional. for hiccup mode, the module will try to restart after shutdown. if the overload condition still exists, the module will shut down again. this restart trial will continue until the overload condition is corrected. for latch mode, the module will latch off once it shutdown. the latch is reset by either cycling the input power or by toggling the on/off signal for one second. over-voltage protection the modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. if this voltage exceeds the over-voltage set point, the module will shut down, and enter hiccup mode or latch mode, which is optional. for hiccup mode, the module will try to restart after shutdown. if the overload condition still exists, the module will shut down again. this restart trial will continue until the overload condition is corrected. for latch mode, the module will latch off once it shutdown. the latch is reset by either cycling the input power or by toggling the on/off signal for one second. over-temperature protection the over-temperature protection consists of circuitry that provides protection from thermal damage. if the temperature exceeds the over-temperature threshold the module will shut down, and enter hiccup mode or latch mode, which is optional. for hiccup mode, the module will try to restart after shutdown. if the overload condition still exists, the module will shut down again. this restart trial will continue until the overload condition is corrected. for latch mode, the module will latch off once it shutdown. the latch is reset by either cycling the input power or by toggling the on/off signal for one second. remote on/off the remote on/off feature on the module can be either negative or positive logic. negative logic turns the module on during a logic low and off during a logic high. positive logic turns the modules on during a logic high and off during a logic low. remote on/off can be controlled by an external switch between the on/off terminal and the vi(-) terminal. the switch can be an open collector or open drain. for negative logic if the remote on/off feature is not used, please short the on/off pin to vi(-). for positive logic if the remote on/off feature is not used, please leave the on/off pin floating. vi(+) vi(-) on/off vo(+) trim vo(-) r load vi(+) vi(-) on/off vo(+) trim vo(-) r load figure 16: remote on/off implementation
ds_s48sp12003_10252013 9 features descriptions (con.) output voltage adjustment to increase or decrease the output voltage set point, the modules may be connected with an external resistor between the trim pin and either the vo(+) or vo(-). the trim pin should be left open if this feature is not used. note: trim pin is optional. r load vo (+) trim vo (-) r trim-down vi (+) vi (-) on/off r load vo (+) trim vo (-) r trim-down vi (+) vi (-) on/off vo (+) trim vo (-) r trim-down vi (+) vi (-) on/off figure 17: circuit configuration for trim-down (decrease output voltage) if the external resistor is connected between the trim and vo(+) pins, the output voltage set point decreases (fig. 17). the external resistor value required to obtain an output voltage change from 12v to the desired vo_adj, which is defined as: rtrim_down vo_adj 2.5 ? ( ) 10000 ? ? 5110 ? ex. when trim-down -10% vo_adj=12v(1-10%)=10.8v rtrim_down 10.8 2.5 ? ( ) 10000 ? 12 10.8 ? 5110 ? rtrim_down 6.406 10 4 = ohm vo (+) trim vo (-) r load r trim-up vi (+) vi (-) on/off vo (+) trim vo (-) r load r trim-up vi (+) vi (-) on/off figure 18: circuit configuration for trim-up (increase output voltage) if the external resistor is connected between the trim and vo(-) the output voltage set point increases (fig. 18). the external resistor value required to obtain an output voltage change from 12v to the desired vo_adj, which is defined as: rtrim_up 2.5 10000 ? ? 511 0 ? ex. when trim-up +10% vo_adj=12v(1+10%)=13.2v rtrim_up 2.5 10000 ? ? 5110 ? rtrim_up=1.572x10 4 ohm when using trim function, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power.
ds_s48sp12003_10252013 10 thermal considerations thermal management is an important part of the system design. to ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. convection cooling is usually the dominant mode of heat transfer. hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. thermal testing setup delta?s dc/dc power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. this type of equipment commonly uses vertically mounted circuit cards in cabinet racks in which the power modules are mounted. the following figure shows the wind tunnel characterization setup. the power module is mounted on a test pwb and is vertically positioned within the wind tunnel. the space between the neighboring pwb and the top of the power module is constantly kept at 6.35mm (0.25??). note: wind tunnel test setup figure dimensions are in millimeters and (inches) 12.7 (0.5?) module a ir flow 50.8 ( 2.0? ) facing pwb pwb a ir velocit y a nd ambien t temperature measured below the module figure 19: wind tunnel test setup thermal derating heat can be removed by increasing airflow over the module. to enhance system reliability, the power module should always be operated below the maximum operating temperature. if the temperature exceeds the maximum module temperature, reliability of the unit may be affected. thermal curves figure 20: temperature measurement location the allowed maximum hot spot temperature is defined at 113 j . 0.0 0.5 1.0 1.5 2.0 2.5 3.0 50 55 60 65 70 75 80 85 ambient temperature ( ?? ) output current(a) natural convection 100lfm s48sp12003(standard) output load vs. ambient temperature and air velocity @vin=48v (either orientation) 200lfm 300lfm 400lfm 500lfm figure 21: output load vs. ambient temperature and air velocity@ v in =48v(either orientation)
ds_s48sp12003_10252013 11 pick and place location surface-mount tape & reel recommended pad layout (smd)
ds_s48sp12003_10252013 12 leaded (sn/pb) process recommend temp. profile time ( sec. ) pre-heat temp. 140~180 x c 60~120 sec. peak temp. 210~230 x c 5sec. ramp-up temp. 0.5~3.0 x c /sec. temperature ( x c ) 50 100 150 200 250 300 60 0 120 180 240 2nd ramp-up temp. 1.0~3.0 x c /sec. over 200 x c 40~50sec. cooling down rate <3 x c /sec. note: the temperature refers to the pin of s48sp, measured on the pin +vout joint. lead free (sac) process recommend temp. profile temp . time 150 j 200 j 100~140 sec. time limited 90 sec. above 217 j 217 j preheat time ramp up max. 3 j /sec. ramp down max. 4 j /sec. peak tem p . 240 ~ 245 j 25 j note: the temperature refers to the pin of s48sp, measured on the pin +vout joint.
ds_s48sp12003_10252013 13 mechanical drawing surface-mount module through-hole module pin no. name function 1 2 3 4 5 6 +vin -vin on/off (optional) -vout trim (optional) +vout positive input voltage negative input volt age remote on/off (optional) negative output voltage output voltage trim (optional) positive output voltage
ds_s48sp12003_10252013 14 part numbering system s 48 s p 120 03 n r f b product type input voltage number of outputs product series output voltage output current on/off logic pin length/type option code s - small power 48v s - single 1x1, 10a 120 - 12v 03 - 3a n - negative (default) p - positive e - no remote on/off control function r - 0.170? (default) n - 0.145? k - 0.110? m - smd f- rohs 6/6 (lead free) a - no trim pin b - with trim pin (default) model list model name input output eff @ 100% load s48sp3r310nrfb 36v~75v 1.1a 3.3v 10a 90.0% s48sp05007nrfb 36v~75v 1.2a 5.0v 7a 90.0% s48sp12003nrfb 36v~75v 1.2a 12v 3a 90.0% S48SP15002NRFB 36v~75v 1a 15v 2a 90.0% note: 1. default otp and output ovp, ocp mode is auto-restart; 2. for different option, please refer to part numbering system above or contact delta local sales. contact: www.deltaww.com/dcdc usa: telephone: east coast: 978-656-3993 west coast: 510-668-5100 fax: (978) 656 3 964 email: dcdc@delta-corp.com europe: telephone: +31-20-655-0967 fax: +31-20-655-0999 email: dcdc@delta-es.com a sia & the rest of world: telephone: +886 3 4526107 x6220~6224 fax: +886 3 4513485 email: dcdc@delta.com.tw warranty delta offers a two (2) year limited warranty. complete warranty information is listed on our web site or is available upon request from delta. information furnished by delta is believed to be accurate and reliable. however, no responsibility is assumed by delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. no license is grante d by implication or otherwise under any patent or patent rights of delta. delta reserves the right to revise these specifications at any time, without notice .

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