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data sheet april 2008 cw025 triple-output-series power modules: 36 vdc to 75 vdc input; 25 w the cw025 triple-output-series power modules use advanced, surface-mount technology and deliver high-qual - ity, compact, dc-dc conversion at an economical price. features n small size: 71.1 mm x 61.0 mm x 12.7 mm (2.80 in. x 2.40 in. x 0.50 in.) n low output noise n industry-standard pinout n metal case n 2:1 input voltage range n remote on/off (positive logic) n ul * recognized, csa ? certified, and vde licensed n within fcc and cispr class a radiated limits n higher accuracy output voltage clamp set point n ce mark meets 73/23/eec and 93/68/eec directives ? applications n distributed power architectures n telecommunications options n isolated case ground pin n short pins: 2.79 mm 0.25 mm (0.110 in. 0.010 in.) n negative logic remote on/off n heat sink available for extended operation description the cw025 triple-output-series power modules are dc-dc converters that operate over an input voltage range of 36 vdc to 75 vdc and provide three outputs. these modules offer extrem ely low noise levels with industry-standard pinouts in a small footprint. each highly reliable and efficient unit features remote on/off and current limit. the maximum total output power of the cw025 triple-output-series power modules is limited to 25 w. the main output (v o1 ) is designed to deliver the entire 25 w. the auxiliary outputs (v o2 and v o3 ) can provide a total of 22.5 w, as long as the total out - put power does not exceed 25 w. efficiency greater than 80%, a wide operating temperature range, and a metal case are additional features of these modules. * ul is a registered trademark of underwriters laboratories, inc. ? csa is a registered trademark of canadian standards associa - tion. ? this product is intended for integration into end-use equipment. all the required procedures for ce marking of end-use equip - ment should be followed. (the ce mark is placed on selected products.)
2 2 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: absolute maximum ratings stresses in excess of the absolute maximum ratings can cause permanent damage to the device. these are abso - lute stress ratings only. functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. exposure to absolute maximum ratings for extended periods can adversely af fect device reliability. parameter symbol min max unit input voltage continuous v i ? 80 vdc i/o isolation voltage: dc transient (1 minute) ? ? ? ? 500 850 v v operating case temperature t c ? 40 100 c storage temperature t stg ? 55 125 c electrical specifications unless otherwise indicated, sp ecifications apply to all modules over all operating input voltage, resistive load, and temperature conditions. table 1 . input specifications parameter symbol min typ max unit operating input voltage v i 36 48 72* vdc maximum input current (v i = 0 v to 75 v; i o = i o, max ) i i, max ? ? 2.0 a inrush transient i 2 t ? ? 0.2 a 2 s input reflected-ripple current, peak-to-peak (5 hz to 20 mhz, 12 h source impedance; t c = 25 c; see figure 18 and design considerations section.) ? ? 25 ? map-p input ripple rejection (120 hz) ? ? 60 ? db * operation is specified to 75 v, provi ded the minimum load on output 1 is at leas t 0.75 a. safety agency reports specify 75 v maximum input. fusing considerations caution: this power module is not internally fu sed. an input line fuse must always be used. this encapsulated power module can be used in a wide va riety of applications, ranging from simple stand-alone operation to an integrated pa rt of a sophisticated power ar chitecture. to preserve maxi mum flexibility, internal fus - ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. the safety agencies require a normal-blow, dc fuse with a ma ximum rating of 5 a in series with the ungrounded input lead. based on the information provided in this data s heet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. refer to the fuse manufacturer?s data for further information.
lineage power 3 data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: electrical specifications (continued) table 2 . output specifications parameter device symbol min typ max unit output voltage (over all operating input voltage, resistive load, and temperature conditions until end of life. see figure 20 .) CW025ABK-M cw025acl-m v o1 v o2 v o3 v o1 v o2 v o3 4.80 10.80 ?10.80 4.80 13.77 ?13.77 ? ? ? ? ? ? 5.20 13.70 ?13.70 5.20 17.20 ?17.20 vdc vdc vdc vdc vdc vdc output voltage set point (v i = 48 v; t c = 25 c; i o1 = 2.0 a, i o2 = i o3 = 0.5 a) CW025ABK-M cw025acl-m v o1, set v o2, set v o3, set v o1, set v o2, set v o3, set 4.90 11.83 ?11.83 4.90 14.84 ?14.84 5.00 12.20 ?12.20 5.00 15.30 ?15.30 5.10 12.57 ?12.57 5.10 15.76 ?15.76 vdc vdc vdc vdc vdc vdc output regulation: line (v i = 36 v to 75 v) load (i o1 = i o, min to i o, max , i o2 = i o3 = i o, min ) temperature (t c = ? 40 c to +100 c) all all all ? v o1 v o1 ? ? ? 0.1 0.1 0.5 0.2 0.2 1.5 % % % output ripple and noise (see figure 19 .): rms peak-to-peak (5 hz to 20 mhz) all all v o1 v o2, v o3 v o1 v o2, v o3 ? ? ? ? ? ? ? ? 25 30 100 150 mvrms mvrms mvp-p mvp-p output current (at i o < i o, min , the modules may exceed output ripple specifications.) CW025ABK-M cw025acl-m i o1 i o2, i o3 i o1 i o2, i o3 0.5 0.1 0.5 0.1 ? ? ? ? 5.0 1.0 5.0 0.83 a a a a output current- limit inception (v o = 90% of v o, nom and minimum load on other outputs.) CW025ABK-M cw025acl-m i o1 i o2, i o3 i o1 i o2, i o3 ? ? ? ? 6 2 6 2 7.5 3.0 7.5 3.0 a a a a output short-circuit current (v o = 1 v and minimum load on other outputs.) CW025ABK-M cw025acl-m i o1 i o2, i o3 i o1 i o2, i o3 ? ? ? ? 8 3 8 3 10.5 4.5 10.5 4.5 a a a a efficiency (v i = 48 v; t c = 25 c; see figures 13 , 14 , and 20 .): i o1 = 2.5 a, i o2 = i o3 = 0.5 a i o1 = 2.0 a, i o2 = i o3 = 0.5 a CW025ABK-M cw025acl-m 80 80 82 83 ? ? % %
4 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: general specifications parameter min typ max unit calculated mtbf (i o = 80% of i o, max ; t c = 40 c) 2,906,000 hours weight ? ? 113 (4.0) g (oz.) dynamic response (yi o /yt = 1 a/10 s, v i = 48 v, t c = 25 c): load change from i o = 50% to 75% of i o, max : peak deviation settling time (v o < 10% peak deviation) load change from i o = 50% to 25% of i o, max : peak deviation settling time (v o < 10% peak deviation) all all all all v o1 ? v o1 ? ? ? ? ? 80 1 80 0.5 ? ? ? ? mv ms mv ms table 3 . isolation specifications parameter min typ max unit isolation capacitance ? 0.02 ? f isolation resistance 10 ? ? m? table 2. output specifications (continued) parameter device symbol min typ max unit electrical specifications (continued)
lineage power 5 data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: feature specifications unless otherwise indicated, specificat ions apply over all operating input voltage, resistive load, and temperature conditions. see feature descriptions and de sign considerations for further information. parameter device symbol min typ max unit remote on/off (v i = 0 v to 75 v; open collector or equivalent compatible; signal referenced to v i (?) terminal. see figure 21 and feature descriptions.): cw025xxx-m (positive logic): logic low?module off logic high?module on cw025xxx1-m (negative logic): logic low?module on logic high?module off module specifications: on/off current?logic low on/off voltage: logic low logic high (i on/off = 0) open collector switch specifications: leakage current during logic high (v on/off = 10 v) output low voltage during logic low (i on/off = 1 ma) turn-on time (i o = 80% of i o, max ; v o within 1% of steady state) output voltage overshoot all all all all all all all i on/off v on/off v on/off i on/off v on/off ? ? ? 0 ? ? ? ? ? ? ? ? ? ? 5 0 1.0 1.2 10 50 1.2 ? 5 ma v v a v ms % output overvoltage clamp CW025ABK-M cw025acl-m v o1 v o2 v o3 v o1 v o2 v o3 ? ? ? ? ? ? 6 15 ?15 6 19 ?19 6.8 17 ?17 6.8 21 ?21 v v v v v v output voltage set-point adjustment range all ? 90 ? 110 %v o, nom
6 6 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: characteristic curves 8-1102(c) figure 1. cw025 triple-output-series typical input characteristics 8-1078(c) figure 2. cw025 triple-output-series typical output voltage variation of 5 v output over ambi- ent temperature range 8-1079(c) figure 3. cw025 triple-output-series typical out- put voltage variation of 12 v output over ambient temperature range 8-1080(c) figure 4. cw025 triple-output-series typical output voltage variation of 15 v output over ambient temperature range 010 20 80 0.0 1.0 input voltage, v i (v) input current, i i (a) 30 70 0.1 0.8 0.9 40 50 60 0.2 0.3 0.4 0.5 0.6 0.7 ?0 ?0 0 20 40 60 80 100 4.95 4.97 4.99 5.01 case temperature, t ( c) output voltage, v o1 (v) 5.00 4.98 4.96 ?0 ?0 0 20 40 60 80 100 11.95 12.10 12.20 12.30 case temperature, t ( c) output voltage, v o (v) 12.00 12.25 12.15 12.05 ?0 ?0 0 20 40 60 80 100 15.10 15.20 15.40 15.50 15.60 case temperature, t ( c) output voltage, v o (v) 15.30 15.55 15.45 15.35 15.25 15.15
lineage power 7 data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: characteristic curves (continued) 8-1103(c) figure 5. CW025ABK-M typical load regulation 8-1104(c) figure 6. CW025ABK-M typical cross regulation with respect to i o1 0.0 0.1 0.2 1.0 11.0 13.5 output current, i o2 ( a ) 0.3 0.7 12.5 13.0 0.4 0.5 0.6 11.5 12.0 v i = 54 v, i o1 = 0.5 a, i o3 = 0.1 a 0.8 0.9 v i = 54 v, i o1 = 2.5 a, i o3 = 0.5 a output voltage, v o2 (v) 0 0.5 1.0 4.5 11.0 13.5 output current, i o1 (a) 1.5 3.5 4.0 12.0 12.5 13.0 11.5 2.0 2.5 3.0 v i = 54 v, i o2 = i o3 = 0.5 a v i = 54 v, i o2 = i o3 = 0.1 a output voltage, v o2 (v) 8-1105(c) figure 7. cw025acl-m typical load regulation 8-1106(c) figure 8. cw025acl-m typical cross regulation with respect to i o1 0 0.1 0.2 0.8 13.8 16.3 output current, i o2 (a) 0.3 0.7 14.3 14.8 15.3 0.4 0.5 0.6 v i = 54 v, i o1 = 2.5 a, i o3 = 0.45 a v i = 54 v, i o1 = 0.5 a, i o3 = 0.1 a 15.8 output voltage, v o2 (v) 0.0 0.4 0.9 4.4 13.8 14.8 16.8 output current, i o1 (a) 1.4 1.9 2.4 15.3 15.8 16.3 14.3 v i = 54 v, i o2 = i o3 = 0.45 a 2.9 3.4 3.9 v i = 54 v, i o2 = i o3 = 0.1 a output voltage, v o2 (v) note: given the same load conditions, output 3 has regulation characteristics similar to output 2, except the polarity is negative.
8 8 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: characteristic curves (continued) 8-1107(c) figure 9. CW025ABK-M typical 5 v output characteristics 8-1108(c) figure 10. CW025ABK-M typical 12 v output characteristics 8-1109(c) figure 11. cw025acl-m typical 5 v output characteristics 0 8 0 5.0 output current, i o1 (a) output voltage, v o1 (v) 2 4.0 4.5 1 3.0 3.5 57 2.5 2.0 0.5 1.5 1.0 34 6 v i = 36 v, i o2 = i o3 = 0.5 a v i = 54 v v i = 72 v v i = 54 v v i = 36 v 9 v i = 72 v, i o2 = i o3 = 0.1 a 0 4.0 0 14 output current, i o2 (a) output voltage, v o2 (v) 1.0 0.5 12 2.5 3.5 10 8 2 6 4 1.5 2.0 3.0 v i = 36 v, i o1 = 2.5 a, i o3 = 0.5 a v i = 54 v v i = 72 v v i = 72 v, i o1 = 0.5 a, i o3 = 0.1 a v i = 54 v v i = 36 v 0 8 0 5.0 output current, i o1 (a) output voltage, v o1 (v) 2 4.0 4.5 1 3.0 3.5 57 v i = 72 v, i o2 = i o3 = 0.45 a v i = 54 v v i = 36 v 2.5 2.0 0.5 1.5 1.0 34 6 v i = 72 v, i o2 = i o3 = 0.1 a v i = 54 v v i = 36 v
data sheet april 2008 lineage power 9 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: characteristic curves (continued) 8-1110(c) figure 12. cw025acl-m typical 15 v output characteristics 0 2.5 3 16 output current, i o2 (a) 1.0 12 14 0.5 8 10 1.5 2.0 v i = 72 v, i o1 = 2.5 a, i o3 = 0.45 a v i = 54 v v i = 36 v 6 5 4 output voltage, v o2 (v) v i = 72 v, i o1 = 0.5 a, i o3 = 0.1 a v i = 54 v v i = 36 v 8-1111(c) note: loads varied proportionately from minimum to 50% of full load. figure 13. CW025ABK-M typical converter ef?iency 0 20 40 120 55 65 85 percent of full load (%) efficiency, h (%) 60 80 100 70 75 80 60 v i = 36 v v i = 54 v v i = 72 v 8-1112(c) note: loads varied proportionately from minimum to 50% of full load. figure 14. cw025acl-m typical converter ef?iency 0 20 40 120 55 65 85 percent of full load (%) efficiency, h (%) 60 80 100 70 75 80 60 v i = 72 v v i = 36 v v i = 54 v
10 10 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: characteristic curves (continued) 8-1098(c) figure 15. cw025 triple-output-series typical output voltage for a step load change from 75% to 50% of full load on output 1 8-1099(c) figure 16. cw025 triple-output-series typical output voltage for a step load change from 25% to 50% of full load on output 1 8-1100(c) figure 17. cw025 triple-output-series typical output voltage start-up when signal applied to remote on/off test con?urations 8-489(c).a note: input re?cted-ripple current is measured with a simulated source impedance (l test ) of 12 ?. capacitor c s offsets pos- sible battery impedance. current is measured at the input of the module. figure 18. input re?cted-ripple test setup time, t (100 ?/div) output voltage, v o (v) (% of v o, set ) output current, i o (a) (% of i o, max ) 75% 50% 25% 99% 100 % 101 % 102 % time, t (100 ?/div) output voltage, v o (v) (% of v o, set ) output current, i o (a) (% of i o, max ) 101% 100% 99% 75% 50% 25% remote on/off (2 v/div) time, t (2 ms/div) output voltage, v o (v) (% of v o, set ) 6 4 2 0 0% 50% 100% to oscilloscope c s 220 ? impedance < 0.1 w @ 20 c, 100 khz v i (+) v i (? l test battery 12 ?
lineage power 11 data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: test con?urations (continued) 8-810(c).c note: use the speci?d ceramic capacitor. scope measurement should be made by using a bnc socket. position the load between 50 mm (2 in.) and 75 mm (3 in.) from the module. figure 19. output noise measurement test setup 8-749(c).c note: all measurements are taken at the module terminals. when socketing, place kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. figure 20. triple output voltage and ef?iency measurement test setup design considerations input source impedance the power module should be connected to a low ac-impedance input source. highly inductive source im- pedances can affect the stability of the power module. a 33 ? electrolytic capacitor (esr < 0.7 w at 100 khz) mounted close to the power module helps to ensure the stability of the unit. safety considerations for safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., ul -1950, csa 22.2-950, and en60950. for the converter output to be considered meeting the requirements of safety extra-low voltage (selv), one of the following must be true: n all inputs are selv and ?ating, with the output also ?ating. n all inputs are selv and grounded, with the output also grounded. n any non-selv input must be provided with reinforced insulation from any other hazardous voltages, includ- ing the ac mains, and must have a selv reliability test performed on it in combination with the convert- ers. inputs must meet selv requirements. if the input meets extra-low voltage (elv) requirements, then the converters output is considered elv. the input to these units is to be provided with a maxi- mum 5 a normal-blow fuse in the ungrounded lead. v o2 (+) v o3 (? scope 0.47 ? copper strip 0.47 ? r load3 v o1 (? 0.1 ? scope r load1 v o1 (+) scope v o2 , v o3 , com r load2 v i (+) i i i o2 supply contact resistance contact and distribution losses load3 sense v o2 (+) sense v o3 (? v o2 (+) v i (? v o1 (+) v o1 (? load2 load1 i o1 sense v o1 (? sense v o1 (+) v o2 , v o3 com sense v o2, v o3 com i o3 v o3 (+) h v oj + () v com [] i oj j1 = 3 ? v i + () v i () () + [] i i --------------------------------------------------------------- 100 =
12 12 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: feature descriptions output overvoltage clamp the output overvoltage clamp consists of control cir- cuitry, independent of the primary regulation loop, that monitors the voltage on the output terminals. the con- trol loop of the clamp has a higher voltage set point than the primary loop (see feature speci?ations table). this provides a redundant voltage control that reduces the risk of output overvoltage. current limit to provide protection in a fault (output overload) condi- tion, the unit is equipped with internal current-limiting circuitry. at the point of current-limit inception, the unit shifts from voltage control to current control. if the out- put voltage is pulled very low during a severe fault, the current-limit circuit can exhibit either foldback or tailout characteristics (output current decrease or increase). the unit operates normally once the output current is brought back into its speci?d range. output voltage set-point adjustment the output voltage adjustment feature provides the capability of increasing or decreasing the output volt- age set point of a module. when the output voltage adjustment feature is used, the output voltage set point of all three outputs is adjusted. the output voltage adjustment can be accomplished by using an external resistor connected between the trim pin and either the v o1 (+) or common pins. with an external resistor between the trim and common pins (r adj-up ), the output voltage set point (v o, adj ) increases. note: the output voltage adjustment range must not exceed 110% of the nominal output voltage between the v o1 (+) and common terminals. with an external resistor connected between the trim and v o1 (+) pins (r adj-down ), the output voltage set point (v o, adj ) decreases. note: the output voltage adjustment must be 90% or more of the nominal output voltage between the v o1 (+) and common terminals. remote on/off two remote on/off options are available. 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. negative logic remote on/off, suf? code ?, turns the module off during a logic high and on during a logic low. to turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the v i (? terminal (v on/off ). the switch can be an open collector or equivalent (see figure 21). a logic low is v on/off = 0 v to 1.2 v. the max- imum i on/off during a logic low is 1 ma. the switch should maintain a logic-low voltage while sinking 1 ma. during a logic high, the maximum v on/off generated by the power module is 10 v. the maximum allowable leakage current of the switch at v on/off = 10 v is 50 ?. 8-758(c).a figure 21. remote on/off implementation caution: to avoid damaging the module or exter- nal circuitry, the v i (? pin must be con- nected to the ?8? source before or simultaneously to connecting the on/off pin to the ?8? source (either directly or through the external on/off circuitry). grounding considerations for modules without the isolated case ground pin option, the case is internally connected to the v i (+) pin. for modules with the isolated case ground pin option, the v i (+) is not connected to the case. r adj-up 42.35 v o, adj v o, nom --------------------------------- - kw = r adj-down v o, adj 2.5 () 16.94 v o, nom v o, adj ------------------------------------------------- kw = + v on/off remote on/off i on/off v i (+) v i (?
data sheet april 2008 lineage power 13 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: thermal considerations note: dimensions are in millimeters and (inches). drawing is not to scale. 8-866(c).b figure 22. thermal test setup 50.8 (2.00) 12.7 (0.50) 101.6 (4.00) 203.2 (8.00) airflow measure case temperature at this point connectors to loads, power supplies, and datalogger, 6.35 (0.25) tall 203.2 (8.00) 9.7 (0.38) 19.1 (0.75) wind tunnel wall air velocity probe ambient temperatur e thermocouple air- flow 27.9 (1.1) 27.9 (1.1) dc-dc power module made in usa 12.7 (0.50) the 25 w triple output power modules are designed to operate in a variety of thermal environments. as with any electronic component, suf?ient cooling must be provided to ensure reliable operation. heat dissipating components inside the module are thermally coupled to the case to enable heat removal by conduction, con- vection, and radiation to the surrounding environment. the thermal data presented is based on measure- ments taken in a wind tunnel. the test setup shown in figure 22 was used to collect data. actual performance can vary depending on the particular application environment.
14 14 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: thermal considerations (continued) basic thermal performance the maximum operating temperature of the cw025 tri- ple-output-series power modules at a given operating condition can be predicted by combining the power dis- sipation curves (figures 23 through 27), the power der- ating curve (figure 28), and the thermal resistance curve (figure 29). use figures 23 through 28 and the steps below to pre- dict the safe operating region for many different operat- ing and environmental conditions. 1. calculate the total output power. p o total = (i o1 x v o1 ) + (i o2 x v o2 ) + (i o3 x v o3 ) 2. use p o total with the appropriate ?ure (figure 23 or 24) to determine the ?ed losses (p p ) associ- ated with operating at p o total. these losses are independent of which output the load is being drawn from. 3. use the desired output current (i o1 ) with figure 25 to determine p s1 , which is the addi- tional power being dissipated due to loading of the main output. 4. repeat step 3 for outputs 2 and 3 using the appropriate ?ure (figure 26 or 27) to determine p s2 and p s3 , which is the power dissipated due to loading of the auxiliary outputs. 5. find the total power dissipated (p d total) by add- ing the four power dissipations obtained in steps 2 through 4. p d total = p p + p s1 + p s2 + p s3 6. use the estimated total power dissipated (p d total) along with figure 28 to determine the maximum ambient temperature allowable for a given air velocity. for example, consider the CW025ABK-M power module operating with 54 v input and output currents i o1 = 2.5 a, i o2 = 0.5 a, i o3 = 0.5 a. the total output power (p o total) is 24.5 w. the total power dissipation is p d total = 4.74 w, which is obtained by adding: p p = 4.4 w (from figure 23) p s1 = 0.22 w (from figure 25) p s2 = 0.06 w (from figure 26) p s3 = 0.06 w (from figure 26) figure 28 shows that, in natural convection, the maxi- mum ambient temperature that this module can oper- ate at is approximately 67 ?. keep in mind that the procedure above provides approximations of the temperature and air velocities required to keep the case temperature below its maxi- mum rating. the maximum case temperature, as moni- tored at the point shown in figure 22, should be maintained at 100 ? or less under all conditions. air velocity the air velocity required to maintain a desired maxi- mum case temperature for a given power dissipation and ambient temperature can be calculated using figure 28 and the following equation: where: n q ca is the thermal resistance from case-to-ambient air (?/w). n t c, max is the desired maximum case temperature (?). n t a is the ambient inlet temperature (?). n p d total is the total power dissipated by the module (w) at the desired operating condition. for example, to maintain a maximum case temperature of 85 ? with an ambient inlet temperature of 65 ? and a power dissipation of 4.74 w, the thermal resistance is: this corresponds to an air?w greater than 0.36 ms ? (70 fpm) in figure 28. q ca t c max , t a p d total ------------------------------ - = q ca 85 c65 c 4.74 w ------------------------------------- 4.2 ?/w =
lineage power 15 data sheet april 2008 3 36 v dc to 75 vdc input; 25 w cw025 triple-output-series power modules: thermal considerations (continued) air velocity (continued) 8-1113(c) figure 23. CW025ABK-M fixed losses, p p 8-1114(c) figure 24. cw025acl-m fixed losses, p p 8-1115(c) figure 25. CW025ABK-M, cw025acl-m losses, associated with 5 v output, p s1 8-1116(c) figure 26. CW025ABK-M, losses associated with 12 v output, p s2 /p s3 0 5 10 30 1.0 3.5 5.5 output power, p o (w) power dissipation, p d (w) 15 20 25 4.0 4.5 5.0 1.5 v i = 36 v v i = 72 v v i = 54 v 3.0 2.5 2.0 0 5 10 30 1.0 1.5 2.0 4.0 6.0 output power, p o (w) power dissipation, p d (w) 15 20 25 4.5 5.0 5.5 2.5 3.0 3.5 v i = 36 v v i = 72 v v i = 54 v 0.0 0.5 1.0 5.0 0.0 0.2 0.4 0.6 1.4 output current, i o1 (a) power dissipation, p d (w) 1.5 2.0 2.5 0.8 1.0 1.2 3.0 3.5 4.0 4.5 v i = 36 v v i = 54 v v i = 72 v 0.0 0.1 0.2 1.0 0.00 0.05 0.15 0.20 0.25 0.45 output current, i o2 or i o3 (a) power dissipation, p d (w) 0.3 0.4 0.5 0.30 0.35 0.40 0.6 0.7 0.8 0.9 0.10
16 16 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: thermal considerations (continued) air velocity (continued) 8-1117(c) figure 27. cw025acl-m losses associated with ?5 v output, p s2 /p s3 8-1118(c) figure 28. total power dissipation vs. local ambient temperature and air velocity 8-1101(c) figure 29. case-to-ambient thermal resistance vs. air velocity use of heat sinks and cold plates the cw025 triple-output-series case includes through-threaded m3 x 0.5 mounting holes, allowing attachment of heat sinks or cold plates from either side of the module. the mounting torque must not exceed 0.56 n/m (5 in.-lb). the following thermal model can be used to determine the required thermal resistance of the sink to provide the necessary cooling: where p d is the power dissipated by the module, q cs represents the interfacial contact resistance between the module and the sink, and q sa is the sink-to-ambient thermal impedance (?/w). for thermal greases or foils, a value of q cs = 0.1 ?/w to 0.3 ?/w is typical. the required q sa is calculated from the following equa- tion: note that this equation assumes that all dissipated power must be shed by the sink. depending on the user-de?ed application environment, a more accurate model including heat transfer from the sides and rear of the module can be used. this equation provides a con- servative estimate in such instances. for further information, refer to the thermal energy management cc-, cw-, dc-, and dw-series 25 w to 30 w board-mounted power modules technical note. 0.0 0.1 0.2 1.0 0.00 0.05 0.15 0.20 0.25 0.45 output current, i o2 or i o3 (a) power dissipation, p d (w) 0.3 0.4 0.5 0.30 0.35 0.40 0.6 0.7 0.8 0.9 0.10 40 50 60 100 0.0 1.0 2.0 3.0 4.0 8.0 local ambient temperature, t a (c) total power dissipation, p d total (w) 70 80 90 5.0 6.0 7.0 2.03 ms ? (400 ft./min.) natural convection 1.02 ms ? (200 ft./min.) 0.51 ms ? (100 ft./min.) nat conv 0.25 (50.0) 0.51 (100.0) 2.03 (400.0) 0.0 8.0 velocity, ms ? (ft./min.) 0.76 (150.0) 1.78 (350.0) 1.0 6.0 7.0 1.02 (200.0) 1.27 (250.0) 1.52 (300.0) 5.0 4.0 3.0 2.0 thermal resistance (c/w) case-to-ambient p d q cs t a tc ts q sa q sa t c t a p d total -------------------- q cs =
lineage power 17 data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: outline diagram dimensions are in millimeters and (inches). copper paths must not be routed beneath the power module standoffs. tolerances: x.x ?0.5 mm (0.02 in.), x.xx ?0.25 mm (0.010 in.). note: for standard modules, v i (+) is internally connected to the case and the case ground pin is not present. if the case ground pin is chosen, device code suf? 7, then v i (+) is not connected to the case and the case ground pin is ?ating. 8-1053(c).a top view side view bottom view 12.7 (0.50) max 5.1 (0.020) 0.51 (0.020) 1.02 (0.040) 0.08 (0.003) dia tin-plated brass, 9 places min 4.8 (0.19) on/off trim 5.1 (0.20) 11.4 (0.45) 3.8 (0.15) mounting inserts m3 x 0.5, 4 places 10.16 (0.400) 5.08 (0.200) 50.8 (2.00) 20.32 (0.800) 7.1 (0.28) case pin optional v o2 (+) 12.70 (0.500) 7.62 (0.300) 27.94 (1.100) 17.78 (0.700) 25.40 (1.000) 15.24 (0.600) 24.1 (0.95) 61.0 (2.40) max 48.3 (1.90) 71.1 (2.80) max v o1 (? v o1 (+) v o3 (? v o2 & v o3 com v i (? v i (+) 63.50 0.38 (2.500 0.015) standoff, 4 places 61.0 (2.40) max 71.1 (2.80) max dc-dc power module m3 made in usa pin 1 indicator
18 lineage power data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: recommended hole pattern component-side footprint. dimensions are in millimeters and (inches). recommended hole size for pin: 1.27 mm (0.050 in.). 8-1053(c).a 11.4 (0.45) 3.8 (0.15) 5.1 (0.20) case outline 10.16 (0.400) 48.3 (1.90) 71.1 (2.80) max m3 x 0.5 clearance hole 4 places (optional) 50.8 (2.00) 12.70 (0.500) 5.08 (0.200) 27.94 (1.100) 17.78 (0.700) 7.62 (0.300) 20.32 (0.800) 25.4 (1.000) 15.24 (0.600) 24.1 (0.95) 61.0 (2.40) max 63.50 0.38 (2.500 0.015)
lineage power 19 data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: ordering information table 4 . ordering information table input voltage output voltage output power remote on/off logic device code comcode 36 v?75 v +5 v, 12 v 25 w positive CW025ABK-M 107587206 36 v?75 v +5 v, 15 v 25 w positive cw025acl-m 107587875 optional features may be ordered using the device code su ffixes shown below. to order more than one option, list suffixes in numerically descending order followed by the -m suffix, indicating metric (m3 x 0.5 heat sink hardware). the heat sinks designed for this package have an m prefix, i.e., mhstxxx45 and mhslxxx45 (see thermal energy management cc-, cw-, dc-, and dw-series 25 w to 30 w board-mounted power modules te c h n i c a l note). table 5 . options table option device code suffix short pins: 2.79 mm 0.25 mm (0.110 in. 0.010 in.) 8 isolated case ground pin 7 negative remote on/off logic 1 please contact your lineage power account manager or fiel d application engineer for pricing and availability.
data sheet april 2008 36 vdc to 75 vdc input; 25 w cw025 triple-output-series power modules: april 2008 ds97-42 4 eps (replaces ds97-423eps ) world wide headquarters lin eag e po wer co rp or atio n 30 00 skyline drive, mesquite, tx 75149, usa +1-800-526-7819 (outside u.s.a.: +1- 97 2-2 84 -2626 ) www.line ag ep ower .co m e-m ail: techsupport1@linea gepower.com a sia-paci fic head qu art er s tel: +65 6 41 6 4283 europe, m iddle-east and afric a he adquarters tel: +49 8 9 6089 286 india headquarters tel: +91 8 0 28411633 lineage power reserves the right to make changes to the product(s) or information contained herein without notice. no liability is assumed as a result of their use or application. no rights under any patent accompany the sale of any such product(s) or information. ? 2008 lineage power corporation, (mesquite, texas) all international rights reserved.

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