hi-rel design ? wave solderable package ? all ceramic capacitors ? surface mount magnetics features dual output ? replaces apex dhc2812d & dhc2815d ? both outputs fully regulated ? no derating C55c to +125c ? high isolation 500v ? tracking ouput v adjustment standard ? remote shutdown ? 11 to 50v input with 5 watt output ? available with 12v or 15v outputs description the DAC2800D series of dc-dc converters provides the ruggedness reliability and features required to meet the ad- vanced design challenges of today's hi-rel market. this has been accomplished while retaining a power density of 15 w/ in 3 and 375 mw/gram of power/package performance. the use of advanced substrate and reflow soldering techniques during construction results in a rugged, cost-effective, and completely solderable package. the DAC2800D hybrid converter series utilizes all ceramic capacitors, surface mount magnetics, and ultrasonically bonded wires to provide reliable operation at all operating temperatures while surviving g forces of up to 500 g. the DAC2800D series has two fully regulated tracking outputs. standard features include output fault monitoring and/or turn on voltage point programming via the shutdown pin. all three functions may be implemented simultaneously with a minimum of external components. an output voltage adjustment / load compensation pin which adjusts both out- puts simultaneously is also standard. fault tolerant design protects these converters from most external circuit faults. the +output and output adjust pins will withstand +25 v while the shutdown pin will withstand +50 v, protecting the converters from a variety of system or board faults e.g. solder bridges etc. unique load fault protection circuitry allows this converter to pull up loads having difficult static load line characteristics and allows short term load excursions significantly beyond ratings in most applications. a transformer isolated flyback converter topology operating at a switching frequency of 400 khz allows operation over a wide input voltage range. internal filtering of outputs elimi- nates the need for external capacitors in many applications. the 8-pin dip package is hermetically sealed and isolated from the internal circuits. heat sinking is recommended for full power operation at elevated ambient temperatures. typical application block diagram external connections p w m feed forward controller error amplifier reference and isolation 4 3 1 2 6 5 7 pass 4707 dey road liverpool, n.y. 13088 m.s.kennedy corp. (315) 701-6751 DAC2800D series iso-9001 certified by dscc 6w dual dc-dc converters rev. a 3/01 1 1 2 3 4 5 +output output common -output adjust/comp shutdown plus 8 7 6 case -input +input
absolute maximum ratings specifications dac2812d ? dac2815d specifications parameter test conditions 1 min typ max min typ max units steady state characteristics input voltage range C55c ? 125c 11 28 50 11 28 50 vdc output voltage (+/C) +i o = Ci o = 10% 11.9 12 12.1 14.9 15 15.1 vdc output current C55c 125c v in = 16 ? 40 225 360 4 180 288 4 madc v in = 11 ? 50 208 333 4 167 267 4 madc output power C55c 125c v in = 16 ? 40 5.4 5.4 w v in = 11 ? 50 5 5 w efficiency +i o = Ci o = 100% 60 64 61 65 % line regulation v in = 11 ? 50; +i o = Ci o = 100% 5 5 mv load regulation + (+i o = 0 C 160%) Ci o = 40% 2 55mv C (-i o = 0 C 160%) +i o = 40% 2 20 15 mv operating temperature, case C55 125 C55 125 c temperature coefficient (vout +/C) 0.006 0.006 %/c input ripple current bandwidth = 10khz ? 1mhz 340 340 marms with 1h series inductance bandwidth = 10khz ? 1mhz 45 45 marms output ripple voltage bandwidth = 10khz ? 1mhz 15 60 15 60 mvrms load capacitance 3 (per output v in = 16 ? 40 100 100 f over C55c 125c) v in = 11 ? 50 50 50 f short circuit dissipation 0.5 0.5 w quiescent input current 50 70 50 70 ma inhibited 0.9 1.25 2.5 0.09 1.25 2.5 ma isolation characteristics (input/output/case) leakage resistance 500 vdc 100 100 m w leakage capacitance 10khz 400 500 400 500 pf dynamic characteristics line step response v in = 16 ? 40 vdc voltage change 200 200 mv recovery time (99%) 250 250 s with 50 f output capacitors 3 voltage change 150 150 mv recovery time (99%) 400 400 s load step response +i o = Ci o = 50 ? 100% voltage change 400 400 mv recovery time (99%) 200 200 s with 50 f output capacitors 3 voltage change 300 300 mv recovery time (99%) 300 300 s start-up overshoot v in = 0 ? 28 vdc 0 0 mv shutdown delay pin 5 = >10 ? <8 vdc 250 500 250 500 s shutdown recovery pin 5 = > 8 ? <10vdc 40 60 40 60 ms dac2812d dac2812d dac2812d dac2812d dac2812d dac2815d dac2815d dac2815d dac2815d dac2815d absolute maximum ratings dac2812d dac2812d dac2812d dac2812d dac2812d dac2815d dac2815d dac2815d dac2815d dac2815d input voltage range (pin 7 to 6 or 5) 50vdc 50vdc input transient (pin 7 to 6) 80v @ 50ms 80v @ 50ms output current (continuous) 360ma 4 288ma 4 temperature, storage C65c, 150c C65c, 150c temperature, pin soldering 10s 300c 300c rev. a 3/01 2
absolute maximum ratings specifications dac2812d ? dac2815d notes: 1. unless otherwise stated t c = 25, v in = 28v, Ci o = +i o = 100%, 2. regulation measured on output pins 1/16" from case. i o = 100% means 2.5 or 2.7 watts. 3. capacitors should be connected from + to common and C to common only. capacitance value imbalance should not be more than 4:1. 4. up to 80% of total load may be drawn from either output. package & thermal specifications min typ max units weight 14 grams temperature rise, junction to case 17 25 c temperature rise, ambient 30 c/w rev. a 3/01 3
typical performance graphs dac2812d 01 56 output current, p out (w) 10 11 12 13 14 15 16 low line drop out input voltage, v in (v) 234 10k 90k 60k 20k 30k 40k input voltage, v in (v) line transient response efficiency contours 30 50 40 10 20 output power, p out (w) 4 123 5 set point resistor, r sp ( w ) time, t (10msec/div) 12 16 20 24 28 turn on threshold turn on voltage, e to (v) turn on response frequency, f (hz) ?00 audio rejection audio rejection, a v (db) 0 ?0 ?0 1k 10k 100k ?0 ?0 response, x (units/div) +12v 0v ?2v +v out v in temp = 25 c 40% 50% 55% 60% 63% 66% 65% input voltage, v in (v) efficiency contours 30 50 40 10 20 output current, p out (w) temp = 125 c 40% 50% 55% 58% 60% 62% 63% input voltage, v in (v) efficiency contours 30 50 40 10 20 output power, p out (w) 5 2 134 5 2 134 temp = ?5 c 40% 50% 55% 67% 59% 62% 65% time, t (100 sec/div) time, t (100 sec/div) ?load transient response output response, x (units/div) output response, x (units/div) output load = 225ma output load = 225ma no output bus capacitance no output capacitance includes 50 f on each output time, t (100 sec/div) + load transient response output response, x (units/div) 360ma 360ma +load ?oad +v out +v out +v out v in 16v ? out 90ma 90ma 1 v 2 a 1v 1v 100ma 500mv 500mv 20v 10 v 2 v no output bus capcitance v in = 28v i out = 225 ma output dc current rating ? out ?oad = 90ma ? out +load = 90ma 40v +v out 28v rev. a 3/01 4
typical performance graphs dac2815d 056 output power, p out (w) 10 11 12 13 14 15 16 low line drop out input voltage, v in (v) 1234 10k 90k 70k 20k 30k 40k50k input voltage, v in (v) line transient response efficiency contours 30 50 40 10 20 output current, p out (w) 5 1234 set point resistor, r sp ( w ) time, t (10msec/div) 12 16 20 24 28 turn on threshold turn on voltage, e to (v) turn on response frequency, f (hz) ?00 audio rejection audio rejection, a v (db) 0 ?0 ?0 1k 10k 100k ?0 ?0 response, x (units/div) +15v 0v 0v ?5v 28v +v out ? out v in temp = 25 c 40% 55% 62% 50% 63% 65% 66% input voltage, v in (v) efficiency contours 30 50 40 10 20 output current, p out (w) 5 1234 temp = 125 c 40% 50% 62% 52% 56% 59% 61% input voltage, v in (v) efficiency contours 15 30 40 35 20 25 output current, i out (a) 3.2 .8 1.6 2.4 4 temp = ?5 c 40% 50% 55% 60% 64% 71% 66% 68% 70% 69% time, t (100 sec/div) time, t (100 sec/div) ?load transient response output response, x (units/div) output response, x (units/div) no output bus capacitance no output capacitance includes 50 f on eachoutput time, t (100 sec/div) load transient response output response, x (units/div) 288ma ?oad = 72ma 288ma 72ma 72ma ? out ? out +v out ? out +v out v in output load = 182ma +load ?load 1 v 1 a 1 v 1 a 500mv 500mv 20v 10 v 2 v no output bus capcitance v in = 28v i out = 182ma output dc current rating ? out output load =182ma + load = 72ma rev. a 3/01 5
dac2812d ? dac2815d application information output adjust / comp the output voltage of the DAC2800D may be adjusted from 90% to 110% of nominal value by the use of a 150k( potenti- ometer as shown. adjustment beyond this range is possible, however certain characteristics of the converter such as but not limited to input voltage range, efficiency, ripple and tem- perature performance will change. characterization by the user is recommended in such applications. adjust/comp (pin 4) may be driven by external circuitry referenced to pin 2 (-output) if desired. grounding pin 4 causes voltage to increase (25% typically) while driving pin 4 above 1.3 v causes output voltage to decrease. pin 4 may be driven negative without damage, however the resultant increase in converter output voltage should be considered. pin 4 may be driven through 10k( or more if connection of the comp function is also required. the comp function of pin 4 allows load transient response to be tailored to suit specific application requirements. this feature may be utilized by connecting a 10nf or less capacitor between pins 4 and 1. shutdown plus pin 5 is used for remote shutdown, output fault detection, and/or setting the input voltage point at which the converter will turn on as shown in the typical application diagram. no connection to pin 5 is necessary for normal operation of the converter. pin 5 is referenced to pin 7 (-input). shutdown may be implemented by simply connecting pin 5 to an open collector logic output or switch rated at 2.5 ma, 25 vdc or higher. input voltage turn on point is programmed with a single resistor from pin 5 to 7. an input turn on/off hysteresis (typically 3.5% of vin) will be observed. this should be considered when making or verifying set point adjustment. the value of the setpoint resistor may be determined by the following: r = 210 * 10 3 e to ?9.5 (+/?10% accuracy at 25 o c) set point temperature coefficient is typically + 400ppm/ o c output fault monitoring is accomplished by observing pin 5 with a high impedance monitoring circuit. pin 5 voltage drops from over 10 v to below 1 v when a load fault causes the converter's fault protection circuitry to activate. it will remain 4 1 2 150k 10nf low for at least 100 ms and return high. if the load fault is still present pin 5 will return low and the cycle will repeat. a resistor > 400k( from pin 5 to 7 provides pull down for pin 5 if there is no input setpoint programming resistor already in place. load fault response the DAC2800D series of dc-dc converters share load fault philosophies. load fault conditions include short-circuit and severe overload conditions. the DAC2800D converter series responds to load faults by turning off all power conver- sion circuits for 250 ms and then attempting to restart for 10 ms (typical). the net "on" duty factor during a fault is very low resulting in low converter dissipation and immunity from overheating at 125c. current beyond rated can flow into the load at startup time. this allows the converter to bring up capacitive and other difficult load types more reliably than competing converters. v o normal time normal load fault o i o o rev. a 3/01 6
the information contained herein is believed to be accurate at the time of printing. msk reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. please visit our website for the most recent revision of this datasheet. m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com note: all dimensions are 0.010 inches unless otherwise labeled. esd triangle indicates pin 1. dac2812d the above example is an industrial grade 12v dual output converter ordering information screening blank= industrial; e= extended reliability; h= class h; k= class k dual output output voltage 12=12v; 15=15v nominal input voltage general part number rev. a 3/01 7 mechanical specifications
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