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datasheet ds_l36sa 3r315 _ 10252013 features ? high efficiency: 8 8 % @ 3.3 v/ 1 5a ? size : 49.6mm x 39.4 mm x 8. 9 mm ( 1.95 x 1.55 x 0.3 5 ) ? industry st andard pin out ? fixed frequency operation ? input uvlo, otp, output o cp, ovp, (auto recovery) ? monotonic startup into normal and pre - biased loads ? 2250v isolation and basic insulation ? no minimum load required ? 4:1 input voltage range ? iso 900 1 , tl 9000, iso 1400 1, qs 9000, ohsas 18001 certified manufacturing facility ? ul/cul 60950 (us & canada) recognized applications ? telecom/datacom ? wireless networks ? optical network equipment ? server and data storage ? industrial/test ing equipment options ? positive on/ off logic ? sense ? heat spreader delphi series l36s s , 2 x 1.6, 50w family dc/dc power module: 18~75v in, 3.3v/ 15 a out the delphi series l36s s , 2 x 1.6, 18~75v input, single output , isolated dc/dc converter is the latest offering from a world leader in power systems technology and manufacturing - delta electronics, inc. this l36sa series provides up to 50 watts of power or 15a of output current ( 3.3 v) in an industry standard 2 x 1.6 form factor and pinout. the delphi l36sa series operates from a wide 1 8~75v (4:1) input voltages. with c reative design technology and optimization of component placement , these converters possess outstanding electrical and thermal performances, as well as extremely high reliability under highly stressful operating conditions . all models are fully protected from abnormal input/output voltage, current, and temperature conditions. the delphi series converters meet all safety requirements with basic insulation. an optional heat spreader is available for extended operation.
ds_l36sa3r315_ 10252013 2 technical specificat ions ( t a =25c, airflow rate=300 lfm, v in =48vdc, nominal vout unless otherwise noted.) parameter notes and conditions l36sa3r315 (standard) min. typ. max. units absolute maximum ratings input voltage co ntinuous 80 vdc maximum input voltage 100 vdc operating temperature refer to figure 21 for measuring point - 40 130 c storage temperature - 55 125 c input/output isolation voltage 2250 vdc input characteristics operating input voltage 18 75 vdc input under - voltage lockout turn - on voltage threshold 16 17 18 vdc turn - off voltage threshold 15 16 17 vdc lockout hysteresis voltage 0.75 1 1.5 vdc maximum input current 100% load, 18 vin 4 a no - load input current 40 ma off converter input current 4 ma inrush current(i 2 t) 1 a 2 s input reflected - ripple current p - p thru 12h inductor, 5hz to 20mhz 20 ma input voltage ripple rejection 120 hz 60 db output characteristics output voltage set point vin=48v , io=io.max, tc=25c 3.267 3.3 3.333 vdc output voltage regulation over load io=io,min to io,max 5 15 mv over line vin=18v to 75v 5 10 mv over temperature ta= - 40c to 85c 30 mv total output voltage range over sample load, line and tempe rature 3.25 3.35 v output voltage ripple and noise 5hz to 20mhz bandwidth peak - to - peak full load, 1f ceramic, 10f tantalum 4 0 8 0 mv rms full load, 1f ceramic, 10f tantalum 10 2 0 mv operating output current range 0 15 a output over current protection 110 150 % dynamic characteristics output voltage current transient 48v, 1 0f tan & 1f ceramic load cap, 0.1 a/s positive step change in output current 50% io.max to 75% io.max 80 mv negative step change in output current 75% i o.max to 50% io.max 80 mv settling time (within 1% vout nominal) 150 us turn - on transient start - up time, from on/off control 20 ms start - up time, from input 20 ms maximum output capacitance full load; 5% overshoot of vout at startup 40 00 f efficiency 100% load 87 % 60% load 87 % isolation characteristics input to output 2250 vdc isolation resistance 100 m isolation capacitance 1500 pf feature characteristics switching frequency 300 khz on/ off control , negative remote on/off logic logic low (module on) von/off at ion/off=1.0ma 0.7 v logic high (module off) von/off at ion/off=0.0 a 2 1 8 v on/off control, positive remote on/off logic logic low (module off) von/off at ion/off= 1.0ma 0.7 v logic high (module on) von/off at ion/off=0.0 a 2 1 8 v on/off current (for both remote on/off logic) ion/off at von/off=0.0v 1 ma leakage current (for both remote on/off logic) logic high, von/off=1 5 v 50 ua output voltage trim range across pins 9 & 5, pout Q max rated power - 10% 10% % output voltage remote sense range (option) pout Q max rated power 10 % output over - voltage protection over full temp range; % of nominal vout 4 v general specifications mtbf io=80% of io, max; ta=25c 3.7 m hours weight 24.2 grams over - temperature shutdown refer to figure 21 for measuring point 134 c
ds_l36sa3r315_ 10252013 3 electrical character istics curves figure 1: efficiency vs. load current for minimum, nominal, an d 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 75vin 48vin 18vin 24vin 48vin 24vin 18vin 75vin 60 70 80 90 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 output current (a) efficiency (%) 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 output current (a) loss (w) 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3 16 21 26 31 36 41 46 51 56 61 66 71 input voltage(v) input current(a)
ds_l36sa3r315_ 10252013 4 electrical cha racteristics curves for negative remote on/off logic figure 4: turn - on transient at full rated load current (resistive load) ( 5 ms/div). vin=48v . top trace: vout , 1v/div; bottom trace: on/off input , 5 v/div f igure 5: turn - on transient at zero load current ( 5 ms/div). vin=48v .top trace: vout , 1v/div; bottom trace: on/off input , 5 v/div for positive remote on/off logic figure 6 : turn - on transient at full rated load current (resistive load) ( 5 ms/div). vin=48v . top trace: vout , 1v/div; bottom trace: on/off input , 5 v/div figure 7: turn - on transient at zero load current ( 5 ms/div). vin=48v . top trace: vout , 1v/div , bottom trace: on/off input , 5 v/div 0 0 0 0 0 0 0 0
ds_l36sa3r315_ 10252013 5 electrical chara cteristics curves 0 figure 8: output voltage response to step - change in load current (75% - 50% - 75% of io, max; di/dt = 0.1a/s). load cap: 10f, tantalum capacitor and 1f ceramic capacitor. top trace: vout ( 10 0 mv/div , 2 00us /div ), bottom trace: i out (3.7 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 (75% - 50% - 75% of io, max; di/dt = 1a/s). load cap: 330 f, 35m ? esr solid electrolytic capacitor and 1 f ceramic capacitor. top trace: vout ( 100 mv/div , 200us /div ), bottom trace: i out (3.7 5 a/div). scope measurement should be made using a bnc cable (length shorte r 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 in put reflected - ripple current with a simulated source inductance (l test ) of 12 h. capacitor cs offset possible battery impedance. measure current as shown above 0 0 0
ds_l36sa3r315_ 10252013 6 electrical character istics curves figure 1 1: input terminal ripple current, i c , at full rated output current and nominal inp ut voltage with 12h source impedance and 33f electrolytic capacitor ( 500 ma/div , 2us /div ). figure 1 2: input reflected ripple current, i s , through a 12h source inductor at nominal input voltage and rated load current ( 2 0 ma/div , 2us /div ). figu re 1 3: output voltage noise and ripple measurement test setup 0 0 strip copper vo(-) vo(+) 10u 1u scope resistive load
ds_l36sa3r315_ 10252013 7 electrical character istics curves figure 14 : output voltage ripple at nominal input voltage and rated load current (io= 10 a) (1 0 mv/div , 2 us /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 m odule. figure 15 : output voltage vs. load current showing typical current limit curves and converter shutdown points. 0 output current range 0 0.5 1 1.5 2 2.5 3 3.5 0 5 10 15 20 output current (a) output voltage (v)
ds_l36sa3r315_ 10252013 8 ? 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 , o ne vi pin and one vo pin shall also be grounded. ? a selv relia bility 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 modules 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 dryin g may lower the reliability of a power module and severely affect the finished circuit board assembly test. adequate cleaning and/or drying are especially important for un - encapsulated and/or open frame type power modules. for assistance on appropriate sol dering and cleaning procedures, please contact deltas technical design consideration s input source impedance the impedance of the input source connecting to the dc/dc power modules will interact with the module s 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 layout and emc considerations deltas dc/dc power modules are designed to operate layout issues, please contact deltas technical supp safety considerations the power module must be installed in compliance with the spacing and separation requirements of the end - users safety agency standard, i.e., ul60950, modules output to meet selv requirements, all of the
ds_l36sa3r315_ 10252013 9 features description s over - current protection the modules include an internal output over - current protection circuit, which will endure current limiting for an unlimited dura tion during output overload. if the output current exceeds the ocp set point, the modules will automatically shut down (hiccup mode) . the modules 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. 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 ov er - voltage set point, the module will shut down (hiccup mode). the modules will try to restart after shutdown. if the fault condition still exists, the module will shut down again. this restart trial will continue until the fault condition is corrected. 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. the module will try to restart after shu tdown. if the over - temperature condition still exists during restart, the module will shut down again. this restart trial will continue until the temperature is within specification. remote on/off the remote on/off feature on the module can be either neg ative or positive logic. negative logic turns the module on during a logic low and off during logic high. positive logic turns the modules on during logic high and off during logic low. remote on/off can be controlled by an external switch between the on /off terminal and the v i ( - ) terminal. the switch can be an open collector or open drain. for negative logic i f the remote on/off feature is not used, please short the on/off pin to vi( - ). for pos i tive logic i f the remote on/off feature is not used, please leave the on/off pin floating . figure 1 6 : remote on/off implementation remote sense remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load. the voltage between the remote sense pins and th e output terminals must not exceed the output voltage sense range given here: [vo(+) C vo( C )] C [sense(+) C sense( C )] 10% v out this limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment (trim) . figure 1 7 : effective circuit configuration for remote sense operation if the remote sense feature is not used to regulate the output at the point of load, please connect sense(+) to vo(+) and sense( C ) to vo( C ) at the module . the output voltage can be increased by both the remote sense and the trim; however, the maximum increase is the larger of either the remote sense or the trim, not the sum of both. when using remote sense and trim, the output voltage of the module is usually increased, which inc reases the power output of the module with the same output current. care should be taken to ensure that the maximum output power does not exceed the maximum rated power. vo(+) vi(+) vo(-) sense(-) sense(+) vi(-) on/off vi(-) vi(+) vo(-) vo(+) sense(+) sense(-) resistance contact contact and distribution losses
ds_l36sa3r315_ 10252013 10 features description s (con.) output voltage adjustment (trim) to increase or dec rease the output voltage set point, the modules may be connected with an external resistor between the trim pin and either the sense(+) or sense( - ). the trim pin should be left open if this feature is not used. figure 18 : circuit configuration for trim - down (decrease output voltage) if the external resistor is connected between the trim and sense ( - ) pins, the output voltage set point decreases (fig. 18 ). the external resistor value required to obtain a percentage of output voltage change ex. when trim - down - 1 0%( 5 v0. 9 = 4 .5v) figure 19 : circuit configuration for trim - up (increase output voltage) if the external resistor is connected between the trim and sense ( + ) the output volt age set point increases (fig. 19 ). the external resistor value require d to obtain a percentage output voltage change ex. when trim - up +10% ( 5 v1.1=5.5v) the output voltage can be increased by both the remote sense and the trim, however the maximum increase is the larger of either the remote sense or th e trim, not the sum of both. when using remote sense and trim, 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 pow er of the module remains at or below the maximum rated power. ? ? ? ? ? ? ? k down rtrim 2 . 10 511 ? ? ? ? ? ? ? k down rtrim 9 . 40 2 . 10 10 511 ? ? ? ? ? ? ? ? ? ? ? k up rtrim 2 . 10 511 1.225 ) (100 vo 11 . 5 ? ? ? ? ? ? ? ? ? ? ? ? k up rtrim 168 2 . 10 10 511 10 1.225 ) 10 (100 5 11 . 5
ds_l36sa3r315_ 10252013 11 thermal consideratio ns 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 tem perature 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 deltas dc/dc power module s 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 moun ted. 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). figure 2 0 : 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 t he temperature exceeds the maximum module temperature, reliability of the unit may be affected. thermal curves figure 2 1 : temperature measurement location the allowed maximum hot spot temperature is defined at 130 . figure 2 2 : output c urrent vs. a m bient t emperature and air velocity @ v in =48 v (either orientation ) note: wind tunnel test setup figure dimensions are in millimeters and (inches) 12.7 (0.5) module air flow 50.8 (2.0) facing pwb pwb air velocity and ambient temperature measured below the module l36sa3r315(standard) output current vs. ambient temperature and air velocity @vin = 48v (either orientation) 0 2 4 6 8 10 12 14 16 30 35 40 45 50 55 60 65 70 75 80 85 natural convection 200lfm 300lfm 100lfm output current (a) ambient temperature ( ) 400lfm
ds_l36sa3r315_ 10252013 12 mechanical drawing pin no. name function 1 case (option) case 2 +vin positive input volta ge 3 C vin negative input volta ge 4 nc not connected 5 on/off remote on/off 6 trim output voltage trim 7 C sense (option) negative output volt age sense 8 C vo ut negative output volt age 9 +vo ut positve output volta ge 10 +sense (option) positve output volta ge sense 11 nc not connected all pins are copper with tin plating open frame version
ds_l36sa3r315_ 10252013 13 part numbering syste m l 36 s a 3r3 15 n r f a type of product input voltage number of outputs product series output voltage output current on/off logic pin length option code l - 2 x 1.6 brick 18~ 75v s - single advanced 3r3 - 3.3 v 15 - 15 a n - negative p - positive r - 0.170 f - rohs 6/6 (lead free) a - standard functions b - with sense model list model name input output eff @ 100% load l36sa3r315 nrfa 18v~75v 2.1a 3.3v 1 5 a 88% l36sa05010 nrfa 18v~75v 1.9a 5 v 10a 89% l36sa12004 nrfa 18v~75v 1.9a 12v 4a 87.5% default remote on/off logic is negative and pin length is 0.170 for different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales c ont act: www.deltaww.com/dcdc usa: telephone: east coast: 978 - 656 - 3993 west coast: 510 - 668 - 5100 fax: (978) 656 3964 email: dcdc@delta - corp.com europe: telephone: +31 - 20 - 6 55 - 0967 fax: +31 - 20 - 655 - 0999 email: dcdc@delta - es. com asia & the rest of world : telephone: +886 3 4526107 x6220 ~6224 fax: +886 3 4513485 email: dcdc@delta.com.tw warran ty 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 gran ted by implication or otherwise under any patent or patent rights of delta. delta reserves the right to revise th ese specifications at any time, without notice .

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