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rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 1 of 11 standard models size: 2.0 0 x 1.0 0 x 0.43 inches (50.8 x 25.4 x 11.0 mm) heatsink models (suffix ?hs?) size: 2.0 0 x 1.22 x 0.71 inches (50.8 x 31.0 x 18.0 mm) features ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? description the dh50 series is the latest generation of high performance dc/dc converters setting a new standard concerning power density. these converters offer 50 watts of continuous output power in a 2.0? x 1.0? x 0.4 3 ? encaps ulated, shielded metal package. all models have a 2:1 wide input voltage range and a precisely regulated single output. advanced circuit topology provides a very high efficiency up to 92% and an operating temperature range of - 40c to +80c. further features include remote on/off, trimmable output voltage, under voltage lockout as we ll as over load, over voltage, short circuit, and over temperature protection. these converters are rohs compliant and are ideal for use in battery operated equipment, instrumentation, distributed power architectures in communication and industrial electro nics and many other space critical applications. model selection table model number input voltage output voltage output current input current reflected ripple current (typ) over voltage protection output power efficiency max imum capacitive load no load max load dh12s3.3 - 33 12 vdc (9 ? 18 vdc) 3.3 vdc 10a 85ma 3090ma 50ma 3.9 vdc 33w 89% 25800 f 17000f 2900f 1900f 25800f 17000f 2900f 00f 25800f 17000f 2900f 1900f notes 1. transient recovery time is measured to within 1% error band for a step change in output load from 75% to 1 00%. 2. we recommend protecting the converter by a slow blow fuse in the input supply line. 3. the dh50 series can meet en55022 class a with external capacitors in parallel with the input pins. ? 12vin models: 22f/25v 1210 mlcc ? 24vin models: 3.3f /50v 1210 mlcc ? 48vin models: 2.2f/100v 1210 mlcc 4. to meet en61000 - 4 - 4 & en61000 - 4 - 5 an external capacitor across the input pins is required. suggested capacitor: chemi - con ky 330f/100v 5. do not exceed maximum power specifications when adjusting the output voltage. 6. to order the converter with a heatsink, please add the suffix ?hs? to the model number. (ex: dh12s12 - 50hs). due to advances in technology, specifications subject to change without notice.
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 2 of 11 specifications: dh50 series all specific ations are based on 25c, nominal input voltage, and maximum output current unless otherwise noted. we reserve the right to change specifications based on technological advances. specification test conditions min typ max unit input specifications input voltage range 12vdc nominal input models 9 12 18 vdc 24vdc nominal input models 18 24 36 48vdc nominal input models 36 48 75 input surge voltage (100ms max.) 12vdc nominal input models - 0.7 25 vdc 24vdc nominal input models - 0.7 50 48vdc n ominal input models - 0.7 100 start - up threshold voltage 12vdc nominal input models 9 vdc 24vdc nominal input models 18 48vdc nominal input models 36 under voltage lockout (uvlo) 12vdc nominal input models 8.3 vdc 24vdc nominal input mod els 16.5 48vdc nominal input models 33 start - up time nominal vin and constant resistive load power up 30 ms remote on/off 30 input current see table reflected ripple current (page 10 ) see table conducted emi for en5503 2 class a and fc c level a compliance see note 3 internal lc filter short circuit current hiccup mode 24vdc output models 0.3 hz others 1.5 output specifications output voltage see table line regulation low line to high line at full load 0.5 % load regul ation minimum load to full load 0.5 % output voltage setting accuracy at 50% load an d nominal vin 1.0 %vnom output voltage trim (page 5 ) % of nominal output voltage 24vdc output models - 10 +20 % others - 10 +10 output power see table outpu t current see table minimum load no minimum load required ripple & noise (0 - 20mhz) (page 10) measured with a 1f mlcc and a 10f tantalum capacitor in parallel 3.3v & 5v output models 100 mvp - p 12v, 15v, & 24v output models 150 transient recov ery time (note 1 ) 25% load step change 250 s transient recovery deviation (note 1 ) 25% load step change 3 5 % temperature coefficient 0.02 %/c protection input polarity protection none over voltage protection (page 10 ) for shutdown volta ge see table over current protection hiccup current limitation at 150% typ. of iout max. thermal protection shutdown temperature 110 c short circuit protection hiccup, automatic recovery general specifications efficiency ( see efficiency curves on pages 7 - 9 ) see table switching frequency 24vdc output models 285 khz others 320 isolation voltage (input to output) 60 seconds 1500 vdc 1 second 1800 isolation resistance 500vdc 1000 m isolation capacitance 100khz, 1v 2200 pf maximu m capacitive load see table
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 3 of 11 specifications: dh50 series all specifications are based on 25c, nominal input voltage, and maximum output current unless otherwise noted. we reserve the right to change specifications based on technological advances. spe cification test conditions min typ max unit remote on/off (page 10 ) positive logic converter on 3.5 ~ 12v or open circuit converter off 0v ~ 1.2 or short circuit control input current on vctrl = 5.0v 0.5 ma off vctrl = 0v - 0.5 control common referenced to negative input stand - by input current nominal vin 2.5 ma environmental specifications operating temperature (w/o heatsink) (see derating curves on page s 6 - 7 ) natural air convection (20lfm) nominal vin and full load 3.3vdc output models - 40 +56 c dh24s5 - 50, dh24s12 - 50 dh24s15 - 50, dh48s5 - 50 dh48s12 - 50, dh48s15 - 50 - 40 +53 c dh12s12 - 50, dh12s15 - 50 , dh12s24 - 50, dh24s24 - 50, dh48s24 - 50 - 40 +46 c dh12s5 - 50 - 40 +38 c operating temperature (w/ heatsink) (see derating curves on pages 6 - 7 ) natural air convection (20lfm) nominal vin and full load 3.3vdc output models - 40 +64 c dh24s5 - 50, dh24s12 - 50 dh24s15 - 50, dh48s5 - 50 dh48s12 - 50, dh48s15 - 50 - 40 +62 c dh12s12 - 50, dh12s15 - 50 , dh12s24 - 50, dh24s24 - 50, dh48s24 - 50 - 40 +5 6 c dh12s5 - 50 - 40 +49 c thermal impedance (w/o heatsink) natural convection (20lfm) 12.1 c/w 100lfm convection 9.2 200lfm convection 7.8 400lfm convection 5.2 thermal impedance (w/ heatsink) natural convection (20lfm) 9.8 c/w 100lfm convection 5.4 200lfm convection 4.5 400lfm convection 3.0 case temperature +105 c storage temperature - 50 +125 c humidity (non - condensing) 95 % rh rfi six - sided shielding, metal case cooling natural convection is about 20lfm but is not equal to still air (0lfm) natural convection lead temperature 1.5mm from case for 10 seconds 260 c mtbf (calculated) mil - hdbk - 217f at 25c, ground benign 224,7 00 hours physical specifications weight 1.06oz (30g) dimensions (l x w x h) 2.0 0 x 1.0 0 x 0.43 inches (50.8 x 25.4 x 11 .0 mm) case material aluminum alloy, black anodized coating base material fr4 pcb (flammability to ul 94v - 0 rated) potting material epoxy (ul94 - v0) pin material copper alloy w ith gold plate over n ickel sub - plate heatsink (optional) ?hs? suffix see page 4 safety & emc safety approvals ul/cul 60950 - 1 recognition (csa ce rtificate) iec/en 60950 - 1 (cb - scheme) emi (see note 3 ) en550 3 2, fcc p art 15 class a ems en55024 esd en61000 - 4 - 2 air: 8 kv, contact: 6kv a radiated immunity en61000 - 4 - 3 10v/m a fast transient (see note 4 ) en61000 - 4 - 4 2kv a surge (see note 4 ) en61000 - 4 - 5 1kv a conducted immunity en61000 - 4 - 6 10v/m a
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 4 of 11 mechanical drawings standard models heatsink models (?hs? suffix )
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 5 of 11 output voltage adjustment output voltage trim allows the user to increase or decrease the output voltage of a module. this is accomplished by connecting an e xternal resistor between the trim pin and e ither the +vout or ? vout pins. with an external resistor between the trim and ? vout pins, the output voltage increases. with an external resistor between the t rim and + vout pins, the output voltage set - point decreases. trim up trim down dhxxs3.3 - 33 dhxxs5 - 50 trim v out,up r up trim v out,up r up 1% 3.333v 60.84 k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k k
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 6 of 11 derating curves dh12s3.3 - 33, dh24s3.3 - 33, dh48s 3.3 - 33 derating curve without heatsink dh12s3.3 - 33, dh24s3.3 - 33, dh48s3.3 - 33 derating curve with heatsink dh24s5 - 50, dh24s12 - 50, dh24s15 - 50, dh48s5 - 50, dh48s12 - 50, dh48s15 - 50 derating curve without heatsink dh24s5 - 50, dh24s12 - 50, dh24s15 - 50, dh48s5 - 50, dh48s12 - 50, dh48s15 - 50 derating curve with heatsink dh12s12 - 50, dh12s15 - 50, dh12s24 - 50, dh24s24 - 50, dh48s24 -50 derating curve without heatsink dh12s12 - 50, dh12s15 - 50, dh12s24 - 50, dh24s24 - 50, dh48s24 -50 derating curve with heatsink
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 7 of 11 derating curves dh12s5 - 50 derating curve without heatsink dh12s5 - 50 derating curve with heatsink efficiency c urves dh12s3.3 - 33 efficiency vs load current dh12s5 - 50 efficiency vs load current dh12s12 - 50 efficiency vs load current dh12s15 - 50 efficiency vs load current
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 8 of 11 efficiency curves dh12s24 - 50 efficiency vs load current dh24s3.3 - 33 efficiency vs load current dh24s5 - 50 efficiency vs load current dh24s12 - 50 efficiency vs load current dh24s15 - 50 efficie ncy vs load current dh24s24 - 50 efficiency vs load current
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 9 of 11 efficiency curves dh48s3.3 - 33 efficiency vs load current dh48s5 - 50 efficiency vs load current dh48s12 - 50 efficiency vs load current dh48s15 - 50 efficiency vs load current dh48s24 - 50 efficiency vs load current
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 10 of 11 design considerations input reflected - ripple current test setup input reflected - ripple current is measured with an indu ctor lin (4.7h) and cin (220f, esr < 1.0 at 100 khz) to simulate source impedance. capacitor cin offse ts possible battery impedance. current ripple is measured at the input terminals of the module. measurement bandwidth is 0 - 500 khz. peak - to - peak ou tput noise measurement test use a 1 f ceramic capacitor and a 10f tantalum capacitor . scope measurement should be made by using a bnc socket, measurement bandwidth is 0 - 20mhz. position the load between 50mm and 75mm from the dc/dc converter. test set up remote on/off positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin and off during a logic low. to turn the module on and off, the user must supply a switch to control the voltage between the on/off terminal and the ? vin t erminal. the switch can be an open collector or equivalent. a logic low is 0v to 1.2v. a logic high is 3.5v to 12v. the maximum sink current at on/off terminal (pin 3) during a logic low is - 100a. over current protection to provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure overload for an unlimited duration. over voltage protection the output over voltage clamp consists of control circuitry which is independent of the primary regulation loop that monitors the voltage on the output terminals. the control loop of the clamp has a higher voltage set point than the primary loop. this provides a redundant voltage control that reduces the risk of output over voltage. the ovp level can be found in the model selection table. input source impedance the power module should be connected to a low ac - impedance input source. highly inductive source impedances can affect the stability of the power module. in applications where power is supplied over long lines and output loading is high, it may be necessary to use a capacitor a t the input to ensure startup. capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low equiv alent series resistance (esr < 1 .0 at 100 khz) capacitor of 33 f for the 12 v dc input models and a 1 0f for the 24 v dc and 48vdc input models .
rev f dh50 series 50 watt dc/dc power converters 0 5/16 /201 7 wall industries, inc. ? 37 industrial drive, exeter, nh 03833 ? tel: 603 - 778 - 2300 ? toll free: 888 - 597 - 9255 ? fax 603 - 778 - 9797 website: www.wallindustries.com ? e - mail: sales@wallindustries.com page 11 of 11 output ripple reduction a good quality low esr capacitor placed as close as possible across the load will giv e the best ripple and noise performance. to reduce output ripp le, it is recommended to use 4.7 f capacitors at the output. maximum capacitive load the dh50 series has a limitation of maximum connected capacitance on the output. the power module may b e operated in current limiting mode during start - up, affecting the ramp - up and the start - up time. the maximum capacitance can be found in the model selection table. thermal considerations many conditions affect the thermal performance of the power modul e, such as orientation, airflow over the module, and board spacing. to avoid exceeding the maximum temperature rating of the components inside the power module, the case te mperature must be kept below 105 c. the derating curves are determined from measure ments obtained in a test setup. model number setup dh 24 s 12 - 50 hs series name input voltage output quantity ouptut voltage output power heatsink 12: 9 - 18 vdc s: single output 3.3: 3.3 vdc 33: 33 watts none: no heatsink 24: 1 8 - 36 vdc 5: 5 vdc 50: 50 watts hs: heatsink 48: 36 - 75 vdc 12: 12 vdc 15: 15 vdc 24: 24 vdc company information wall industries, inc. has created custom and modified units for over 50 years. our in - hou se research and development engineers will provide a solution that exceeds your performance requirements on - time and on budget. our iso9001 - 2008 certification is just one example of our commitment to producing a high quality, well - documented product for ou r customers. our past projects demonstrate our commitment to you, our customer. wall industries, inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. we will continue to provide ongoing support for your project above and beyond the design and production phases. give us a call today to discuss your future projects. contact wall industries for further information: phone: ? (603)778- 2300 toll free: ? (888)597 - 9255 fax: ? (60 3)778- 9797 e - mail: sales@wallindustries.com web: www.wallindustries.com address: 37 industrial drive exeter, nh 03833

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