innovation and ex c ell e n c e ? ? single output ucp models ul/en approved, "half-brick" 40-75 watt, dc/dc converters features the high ef? ciency, low noise and long-term reliability that de? nes datel dc/dc converters now comes to you in the standard "half-brick" con? guration (2.3" x 2.4" x 0.52"). all models in our new ucp series meet ul/en60950 safety require- ments, including each european country?s deviations. a cb test certi? cate/report is available. all models have basic insulation; guarantee 1500vdc isolation; and because they are designed with class b thermal insulation, satisfy all safety require- ments over their full operating temperatures. ucp models are designed for demanding telecom, datacom and networking applications. their "semi-synchronous-recti? er" design (400khz switching) achieves impressive ef? ciencies (up to 88%). output voltages are 3.3, 5, 12 or 15 volts. input voltage ranges are 10-18v ("d12" models), 18-36v ("d24" models) or 36-75v ("d48" models). "d48" models meet the low voltage directive (lvd) and carry the ce mark. for high reliability and affordability, datel utilizes high-speed automatic assem- bly to construct the ucp?s proven smt-on-pcb designs. all models have been rigor- ously quali? ed (including a 500-hour life test) and emc characterized. devices are housed in metal cases (with non-conductive baseplates) that incorporate threaded inserts for add-on heat sinks and/or pcb mounting. ucp?s feature input pi ? lters, input undervoltage and overvoltage lockout, output current limiting, short-circuit protection, and thermal shutdown. additionally, all devices have output trim capability and an on/off control pin that can be ordered with either polarity or replaced with a sync function. we can easily modify standard- product ucp?s to meet your application-speci? c requirements. figure 1. simpli ed schematic standard "half-brick" con guration ul/en60950 safety approvals (basic insulation) mark for "d48" models (36-75v inputs) fully isolated, 1500vdc guaranteed output voltages: 3.3, 5, 12 or 15 volts v in ranges: 10-18v, 18-36v, 36-75v full 40-75 watt output power reliable smt-on-pcb construction input under and overvoltage shutdown output current limiting and short-circuit protection on/off, v out trim and sense functions modi cations and customs for oem s ?v out +v in ?v in pwm controller opto isolation reference & error amp comparators uvlo & ovlo on/off control trim +sense ?sense +v out switch control (3) (1) (4) (5) (6) (9) 10 ? 10 ? (8) (7) ? the on/off control function can be ordered with either positive (standard) or negative polarity. it can also be replaced with an optional sync function. ? 12v- and 15v-output models have a standard forward architecture in which this fet is replaced with a schottky diode. datel, inc., mans? eld, ma 02048 (usa) tel: (508)339-3000, (800)233-2765 fax: (508)339-6356 email: sales@datel.com internet: www.datel.com
xcp series 40-75w, single output dc/dc converters output cont guration: u = unipolar nominal output voltage: 3.3, 5, 12 or 15 volts cp / input voltage range: d12 = 10-18 volts (12v nominal) d24 = 18-36 volts (24v nominal) d48 = 36-75 volts (48v nominal) maximum output current in amps standard half-brick package 5 u 12 - d48 - n see optional functions bottom view (4) threaded inserts #m3 thd thru 1 2 3 4 5 6 7 8 9 1.900 (48.26) 2.000 (50.80) 2.30 (58.42) 0.515 (13.08) 0.20 min. (5.08) 0.20 (5.08) 0.400 (10.16) 0.700 (17.78) 0.50 (12.70) 1.000 (25.40) 1.400 (35.56) 2.40 (60.9 6 0.20 (5.08) metal case pin diameters: pins 1-4, 6-8 0.040 0.002 (1.016 0.051 ) pins 5, 9 0.080 0.002 (2.032 0.051 ) insulated base case c12 optional heat sinks datel offers two heat sinks (part number hs-cp and hs-cplp2) for the ucp models. for mechanical specit cations, see page 7. typical at t a = +25?c under nominal line voltage and full-load conditions unless otherwise noted. ripple/noise (r/n) measured over a 20mhz bandwidth. all models are specit ed with external 33f, low-esr, input capacitors and 10f tantalum in parallel with 1f ceramic output capacitors. performance specit cations and ordering guide package v out i out p out r/n (mvp-p) regulation (max.) v in nom. range i in eft ciency (case, model (volts) (amps) (w) typ. max. line load (volts) (volts) (ma/a) min. typ. pinout) ucp-3.3/12-d12 3.3 12 40 75 150 0.5% 1.0% 12 10-18 200/4.2 81% 83% c12, p17 ucp-3.3/15-d24 3.3 15 50 75 150 0.5% 1.0% 24 18-36 75/2.6 81% 83% c12, p17 ucp-3.3/15-d48 3.3 15 50 75 150 0.5% 1.0% 48 36-75 75/1.3 81% 83% c12, p17 ucp-5/10-d12 5 10 50 75 120 0.5% 1.0% 12 10-18 200/5.2 82% 84% c12, p17 ucp-5/12-d24 5 12 60 75 120 0.5% 1.0% 24 18-36 75/3 85% 87% c12, p17 ucp-5/12-d48 5 12 60 75 120 0.5% 1.0% 48 36-75 75/1.5 84% 86% c12, p17 ucp-5/15-d48 5 15 75 75 120 0.5% 1.0% 48 36-75 100/1.9 84.5% 86% c12, p17 ucp-12/4.2-d12 12 4.2 50 75 120 0.5% 1.0% 12 10-18 100/5 85% 87% c12, p17 ucp-12/5-d24 12 5 60 75 120 0.5% 1.0% 24 18-36 50/3 84% 86% c12, p17 ucp-12/5-d48 12 5 60 75 120 0.5% 1.0% 48 36-75 50/1.5 86% 88% c12, p17 ucp-15/3.3-d12 15 3.3 50 100 150 0.5% 1.0% 12 10-18 100/4.9 85% 87% c12, p17 ucp-15/4-d24 15 4 60 100 150 0.5% 1.0% 24 18-36 50/2.9 86% 88% c12, p17 ucp-15/4-d48 15 4 60 100 150 0.5% 1.0% 48 36-75 50/1.5 86% 88% c12, p17 output input lx 10% to 100% load step. nominal line voltage, no-load/full-load conditions. mechanical specifications part number structure optional functions ucp 40-75 watt dc/dc's are designed with an on/off control function, with either positive polarity (no suft x) or negative polarity ("n" suft x), in the pin 3 position. blank on/off control function (positive polarity) on pin 3 n on/off control function (negative polarity) on pin 3 l1 pin length: 0.110 inches (2.79mm) 0.010 l2 pin length: 0.145 inches (3.68mm) 0.010 i/o connections pin function p17 1 einput 2 case 3 on/off control 4 +intput 5 +output 6 +sense 7 trim 8 esense 9 eoutput 2
ucp models 40-75w, single output dc/dc converters performance/functional speci cations typical @ t a = +25? under nominal line voltage and full-load conditions, unless noted. ?? input voltage: continuous: d12 models 22 volts d24 models 44 volts d48 models 88 volts transient (100msec): d12 models 25 volts d24 models 50 volts d48 models 100 volts input reverse-polarity protection current must be <15/10 amps. brief duration only. fusing recommended. output overvoltage protection 3.3v outputs 4.5 volts, limited duration 5v outputs 6.8 volts, limited duration 12v outputs 15 volts, limited duration 15v outputs 18 volts, limited duration output current current limited. 12/15v devices can withstand an output short circuit for a brief duration only. 3.3/5v devices can withstand output shorts inde nitely. storage temperature ?0 to +105? lead temperature (soldering, 10 sec.) +300? these are stress ratings. exposure of devices to any of these conditions may adversely affect long-term reliability. proper operation under conditions other than those listed in the performance/functional speci cations table is not implied. absolute maximum ratings input input voltage range: d12 models 12-18 volts (12v nominal) d24 models 18-36 volts (24v nominal) d48 models 36-75 volts (48v nominal) overvoltage shutdown: d12 models 20 volts d24 models 40 volts d48 models 80 volts start-up threshold: ? d12 models 9.5 volts d24 models 17 volts d48 models 35 volts undervoltage shutdown: ? d12 models 9 volts d24 models 16 volts d48 models 34 volts input current: normal operating conditions see ordering guide standby mode (off, ov, uv) 5ma input filter type pi reverse-polarity protection: d12/d24 models brief duration, 15a maximum d48 models brief duration, 10a maximum on/off control (pin 3) ? ttl high (or open) = on, low = off output v out accuracy (50% load): ? 3.3v outputs ?.5%, maximum 5/12/15v outputs ?%, maximum temperature coef cient ?.04% per ? ripple/noise (20mhz bw) ?? see ordering guide line/load regulation see ordering guide ef ciency see ordering guide isolation voltage: input-to-output 1500vdc, minimum input-to-case 1500vdc, minimum output-to-case 1500vdc, minimum isolation capacitance 750pf isolation resistance 100m ? current limiting: 3.3v and 5v outputs hiccup technique, auto-recovery 12v and 15v outputs power-limiting technique, auto-recovery overvoltage protection zener/transorb clamp, magnetic feedback dynamic characteristics transient response (50% load step) 200?ec max. to ?.5% of nal value start-up time: ? v in to v out 50msec on/off to v out 30msec switching frequency 400khz (?5khz) environmental operating temperature (ambient): without derating ?0 to +45/50? (model dependent) with derating to +100? (see derating curves) case temperature: maximum allowable +100? for thermal shutdown +95? minimum, +105? maximum storage temperature ?0 to +105? ? these power converters require a minimum 10% output loading to maintain speci ed regulation. operation under no-load conditions will not damage these devices; however they may not meet all listed speci cations. ? all models are speci ed with external 33?, low-esr, input capacitors and 10? tantalum in parallel with 1? ceramic output capacitors. ? see technical notes for details. ? devices may be ordered with the opposite polarity (pin 3 open = off), or the on/off control function can be replaced with a sync function. see part number suf xes and technical notes for additional information. ? accracy is speci ed with the sense pins tied directly to their respective output pins. ? output noise may be further reduced with the installation of additional external output capacitors. see technical notes. physical dimensions 2.3 x 2.4 x 0.515" (58.4 x 61 x 13.1mm) shielding 5-sided case connection pin 2 case material zinc with a non-conductive, epoxy-based black enamel nish and plastic baseplate pin material brass, solder coated weight 5.3 ounces (149 grams) 3
xcp series 40-75w, single output dc/dc converters 4 d12 models (50 watts) figure 2a. temperature derating without heat sink figure 2b. temperature derating with hs-cp heat sink figure 3a. temperature derating without hs-cp heat sink figure 3b. temperature derating with hs-cp heat sink d24 models (60 watts) output power (w atts) ambient temperature (c) 60 50 40 30 20 10 0 natural c onvection cooling 150 linear feet per minute 300 linear feet per minute ?40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 output power (w atts) ambient temperature (c) 60 50 40 30 20 10 0 natural c onvection cooling 150 linear feet per minute 300 linear feet per minute ?40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 output power (w atts) ambient temperature (c) 60 50 40 30 20 10 0 natural c onvection cooling 150 linear feet per minute 300 linear feet per minute ?40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 output power (w atts) ambient temperature (c) 60 50 40 30 20 10 0 natural c onvection cooling 150 linear feet per minute 300 linear feet per minute ?40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 output power (w atts) ambient temperature (c) 60 50 40 30 20 10 0 natural c onvection cooling 150 linear feet per minute 300 linear feet per minute ?40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 output power (w atts) ambient temperature (c) 60 50 40 30 20 10 0 natural c onvection cooling 150 linear feet per minute 300 linear feet per minute ?40 0 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 figure 4a. temperature derating without hs-cp heat sink figure 4b. temperature derating with hs-cp heat sink d48 models (60 watts)
ucp models 40-75w, single output dc/dc converters 5 floating outputs since these are isolated dc/dc converters, their outputs are " oating." designers will usually use the ?utput (pin 9) as the ground/return of the load circuit. you can, however, use the +output (pin 5) as ground/return to effectively reverse the output polarity. filtering and noise reduction all ucp dc/dc converters achieve their rated ripple and noise speci cations using the external input and output capacitors speci ed in the performance/ functional speci cations table. in critical applications, input/output noise may be further reduced by installing additional external i/o caps. input capacitors should be selected for bulk capacitance, low esr and high rms-ripple-current ratings. output capacitors should be selected for low esr and appropriate frequency response. all caps should have appropriate voltage ratings and be mounted as close to the converters as possible. the most effective combination of external i/o capacitors will be a function of your particular load and layout conditions. our applications engineers will be happy to recommend potential solutions and can discuss the possibility of our modifying a given device s internal ltering to meet your speci c require- ments. contact our applications engineering group for additional details. input fusing certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. fuses should also be used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exists. for datel ucp dc/dc converters, you should use slow- blow type fuses with values no greater than the following. v in range fuse value d12 models 7 amps d24 models 6 amps d48 models 3 amps start-up threshold and undervoltage shutdown under normal start-up conditions, devices will not begin to regulate until the ramping-up input voltage exceeds the start-up threshold voltage (35v for "d48" models). once operating, devices will not turn off until the input voltage drops below the undervoltage shutdown/lockout limit (34v for "d48" models). subsequent re-start will not occur until the input is brought back up to the start-up threshold. this built-in hysteresis obviously avoids any unstable on/off situations at a single voltage. start-up time the v in to v out start-up time is the interval between the time at which a ramping input voltage crosses the turn-on threshold point and the fully- loaded output voltage enters and remains within its speci ed accuracy band. actual measured times will vary with input source impedance, external input capacitance, and the slew rate and nal value of the input voltage as it appears to the converter. the on/off to v out start-up time assumes the converter has its nominal input voltage applied but is turned off via the on/off control. the speci cation de nes the interval between the time at which the converter is turned on and the fully loaded output voltage enters and remains within its speci ed accuracy band. on/off control (standard) the on/off control pin (pin 3) may be used for remote on/off operation. as shown in figure 5, the control pin is referenced to the ?nput (pin 1) and has an internal pull-up resistor (28.7k ?, 75k ? and 100k ? respectively for d12, d24 and d48 models) to the +input (pin 4). the standard ucp converter is designed so that it is enabled when the control pin is left open and disabled when the control pin is pulled low (to less than +0.8v relative to ?nput). when left open, pin 3 is pulled up to approximately 5v on "d24" models and 8v on "d48" models. dynamic control of the on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appro- priate). the drive circuit should obviously be able to sink approximately 1ma when activated and withstand more than 10 volts when deactivated. applying an external voltage to pin 3 when no input power is applied to the converter can cause permanent damage to the converter. the on/off control function, however, is designed such that the converter can be disabled (pin 3 pulled low) while input power is ramping up and then "released" once the input has stabilized. under these circumstances, it takes approximately 30ms for the output of the fully loaded dc/dc to ramp up and settle to within rated accuracy. for ucp converters con gured with the negative-polarity option on the on/off control pin ("n" suf x added to part number), operation is exactly opposite to that described above. technical notes 3 1 4 +input ?input on/off control figure 5. driving the on/off control pin input reverse-polarity protection upon applying a reverse-polarity voltage to the dc/dc converter, an internal diode will be forward biased and draw excessive current from the power source. therefore, it is required that the input current be limited be either an appropriately rated input fuse or a current limited power source.
xcp series 40-75w, single output dc/dc converters output trimming v out may be trimmed ?% via a single trimpot or xed resistor. as shown in figure 6, the trimpot should be connected between +output (pin 5) and ?utput (pin 9) with its wiper connected to trim (pin 7). a trimpot can also be used to determine the value of a single xed resistor which can be connected between pin 7 (trim) and pin 5 (+output) to trim "down" the output voltage, or between pins 7 (trim) and 9 (?utput) to trim "up" the output voltage, as shown in figure 7. fixed resistors should be metal- lm types with absolute tcr's less than 100ppm/? to ensure stability. the sense pins switching dc/dc converters incorporate a feedback loop that continuously monitors the difference between the output voltage and an internal precision reference. in situations in which load currents and/or conductor impedances are relatively high, there may be unacceptable voltage drops between the converter output and its load. the purpose of the sense pins (pins 6 and 8) is to monitor and feed back the output voltage at the load, rather than at the output of the converter, and to adjust the converter output as necessary to maintain the load voltage at its desired level. the sense pins (which the converter output sees as having an effective 10 ohm line impedance) should be connected across the output voltage at the load and not at the output of the converter. see figure 8. the sense pins then function similar to the trim pin, and they effectively have the same ?% compensation range. if, for example, the combination of load current and line impedance causes a 5v output to drop to +4.75v at its load (a 5% drop), the sense function will compensate by raising the output voltage at the converter to +5.25v. if the load voltage drops to +4.5v, the sense function will not be able to compensate for the full drop, and other measures (like reducing line impedance) must be taken. if you are using both the external trim and sense functions, you must not attempt to force the converter output voltage more than 5% above its initial, "untrimmed" value. when ucp dc/dc converters are tested for output accuracy during nal test, the sense pins are connected directly to their respective output pins. +input ?input trim load 20k 5-10 turns +output 4 1 5 9 7 ?output trim down trim up 4 1 load +input ?input +output trim 5 9 7 ?output figure 6. trim connections using a trimpot figure 7. trim connections using fixed resistors +input ?input load +output 4 1 5 9 8 ?output +sense ?sense 6 figure 8. sense connections made at the load case connection unlike most other dc/dc converters, ucp dc/dc's do not have their metal case connected to one of their input pins. the "uncommitted" case is con- nected to pin 2 which, depending upon your system con guration, should be connected to either +input (pin 4), ?nput (pin 1), ?utput (pin 9), or earth ground. 6
ucp models 40-75w, single output dc/dc converters ds-0437a 10/02 datel makes no representation that the use of its products in the circuits described herein, or the use of other technical info rmation contained herein, will not infringe upon existing or future patent rights. the descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. speci? cations are s ubject to change without notice. the datel logo is a registered datel, inc. trademark. datel (uk) ltd. tadley, england tel: (01256)-880444 datel s.a.r.l. montigny le bretonneux, france tel: 01-34-60-01-01 datel gmbh mnchen, germany tel: 89-544334-0 datel kk tokyo, japan tel: 3-3779-1031, osaka tel: 6-6354-2025 datel, inc. 11 cabot boulevard, mans? eld, ma 02048-1151 tel: (508) 339-3000 (800) 233-2765 fax: (508) 339-6356 internet: www.datel.com email: sales@datel.com iso 9001 registered innovation and ex c ell e n c e ? ? optional heat sinks (part number hs-cp) 2.000 (50.80) 2.30 (58.42) 1.900 (48.26) 2.40 (60.96) 0.20 (5.08) 0.147 dia. (3.734) (4 places) 0.20 (5.08) 0.50 (12.70) typ. 051 (12.95) max. 0.10 (2.54) top view material: black anodized aluminum 4 mounting screws and 0.009 (0.229) thick thermal pad included optional heat sink (part number hs-cplp2) 3.50 (88.90) 0.75 (19.05) 0.20 (5.08) 0.140 thru and countersink 90? to 0.26 (4 places) 2.000 (50.80) 1.900 (48.26) 2.30 (58.42) 0.47 (11.94) material: black anodized aluminum 2.48 (62.99) 0.16 (4.06) heat sinks for ucp series datel offers two standard heat sinks that can be mounted to the half-brick package to extend the converter's operating temperature range. along with the standard 2.3" x 2.4" x 0.5" (hs-cp) heat sink, datel has designed a low-pro le heat sink for height-restricted applications. this new heat sink (hs-cplp2) is designed with radiant ns that extend 0.51" beyond either side of the 2.4" dimension of the bcp package. the convenience of this design is that the nned extensions protrude only 0.31" below the top surface of the dc/dc converter, allowing components with a pro le height less than 0.2" to be mounted on the pc board below the heat sink. therefore, while the surface area of the low-pro le heat sink measures 2.3" x 3.5", pcb real estate is unaffected. for optimum thermal performance in a natural convection application, the low-pro le heat sink should be mounted with the ns vertically oriented. both models are shipped with 0.009" sellf-adhesive thermal pad and mounting screws. note: when mounting the heat sink to the ucp converter: 1. maximum applied torque is 6 in-lbs. 2. minimum thread engagement of the mounting screws is 12mm deep. 6 5 4 3 2 1 0 0 100 200 300 400 500 600 70 0 air velocity (ft./min.) hs-cp thermal resistance ? c watt hs-cplp2 figure 9. hs-cp and hs-cplp2 heat sink performance vs. air flow 7
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