4707 dey road liverpool, n.y. 13088 (315) 701-6751 wave solderable package all ceramic capacitors surface mount magnetics mil std 461c ce03 (with efj2803 filter) 80 volt input transient tolerent wide supply range - 11v to 50v high isolation - 500v high power density - 15 w/in3 output voltage adjustment - standard remote shutdown operates to 11v input at 5w available with 12v or 15v outputs see dhc2800s series for 3.3v and 5.0v versions available to dscc smd 5962-93093 and 5962-94631 replaces interpoint msa2812s, msa2815s and ir asa2812s, asa2815s mil-prf-38534 certified m.s.kennedy corp. 5.4w dc-dc converters dac2800s description: rev. e 5/08 1 series features: the dac2812s and dac2815s dc-dc converters are higher output voltage companion devices to msk's dhc types. the dac's provide the ruggedness, reliability and features required to meet the advanced 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 dac2800s hybrid converter series utilizes all ceramic capacitors, surface mount magnetics, and ultrasonically bonded wires to provide reliable operation at all operating temperatures. the dac2800s series 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 outputs 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 eliminates the need for external capacitors in many applications. the 8-pin package is hermetically sealed and isolated from the internal circuits. heat sinking is recommended for full power operation at elevated ambient temperatures.
equivalent schematic isolated step down power supply microprocessor power source low voltage subsystem power source typical applications 1 2 3 4 5 +output -output nc adjust/comp shutdown plus pin-out information case -input +input 8 7 6 -65c to +150c 300c see efficiency curve 150c 5.0c/w absolute maximum ratings input voltage (pin 7 to pin 6) input transient (pin 7 to pin 6 @ 50ms) output current dac2812s dac2815s case temperature range dac2800s h/e dac2800s v in v int i out t c storage temperature range lead temperature range (10 seconds) power dissipation junction temperature thermal resistance (switches) t st t ld p d t j q jc rev. e 5/08 2 note: continuous operation at or above the absolute maximum ratings may adversely effect the performance and/or life of the device. +50v 80v 450ma 360ma -55c to +125c -40c to +85c
bw=10khz to 2mhz lin=2h v in =16, 28 and 40 vdc i out =0, 208 and 417ma v in =16, 28 and 40 vdc i out =0, 208 and 417ma i out =208ma to/from 417ma transition time=30s i out =208ma to/from 417ma transition time=30s v in =16v to/from 40v transition time=30s v in =16v to/from 40v transition time=30s p out =5.4w max. p out =5w max. enabled, i out =0ma disabled i out =0ma no effect on dc performance input to output or any pin to case @ 500v r pot =50k w 11v v in 50v 16v v in 40v bw=10khz to 2mhz 1 2 3 4 5 6 7 8 +v in = 28v, i out = 417ma, t a =t c =25c unless otherwise specified. guaranteed by design but not tested. typical parameters are representative of actual device performance but are for reference only. industrial grade and "e" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified. military grade devices ("h" suffix) shall be 100% tested to subgroups 1, 2, 3 and 4. subgroups 5 and 6 testing available upon request. subgroup 1, 4 t a =t c =+25c 2, 5 t a =t c =+125c 3, 6 t a =t c = -55c device has internal shutdown feature that pulses the output with a low duty cycle during faults. consult dscc smd for electrical parameters for devices purchased as such. electrical specifications notes: rev. e 5/08 3 capacitive load isolation short circuit current limit switching frequency vout adjustment range vdc vdc ma ma ma ma mvrms mvrms map-p map-p mv mv mv mv % % mv mv s s mv mv s s mv mv ms ms s s ms v v ma ma f m w a khz % min. 11.9 11.76 417 417 450 450 - - - - - - - - 62 60 - - - - - - - - - - - - - - - 16 11 - - - 100 0.50 375 10 output voltage output voltage ripple input current ripple line regulation load regulation efficiency step load response step load recovery step line response step line recovery start up overshoot start up delay shutdown delay parameter test conditions 1 max. 12.1 12.24 - - - - 60 100 125 200 25 50 25 50 - - 500 700 200 200 500 500 200 200 200 200 60 60 500 500 60 40 50 50 2.5 300 - 1.8 425 - dac2812s dac2812s h/e input voltage range output current units typ. 12.0 - - - - - 15 - 76 - 5 - 5 - 67 - 350 - 80 - 200 - 90 - 0 - 40 - 250 - 40 - - 35 1.25 - - 1.1 400 - group a subgroup 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 4 5,6 4 5,6 4 5,6 4 5,6 4 5,6 4 5,6 4 5,6 - 1,2,3 1,2,3 1,2,3 1,2,3 1,2,3 1 1 4 1 7 2 min. 11.85 - 417 - 450 - - - - - - - - - 62 - - - - - - - - - - - - - - - - 16 11 - - - 100 0.50 375 10 max. 12.15 - - - - - 60 - 125 - 30 - 30 - - - 500 - 200 - 500 - 200 - 200 - 60 - 500 - 60 40 50 50 2.5 300 - 1.8 425 - typ. 12.0 - - - - - 15 - 76 - 5 - 5 - 67 - 350 - 80 - 200 - 90 - 0 - 40 - 250 - 40 - - 35 1.25 - - 1.1 400 - shutdown recovery quiescent current 2 2 2 2 2 2 dac2812s 2
bw=10khz to 2mhz lin=2h v in =16,28 and 40vdc i out =0,167 and 333ma v in =16,28 and 40vdc i out =0,167 and 333ma i out =167ma to/from 333ma transition time=30s i out =167ma to/from 333ma transition time=30s v in =16v to/from 40v transition time=30s v in =16v to/from 40v transition time=30s p out =5.4w max. p out =5w max. enabled, i out =0ma disabled i out =0ma no effect on dc performance input to output or any pin to case @ 500v r pot =50k w 11v v in 50v 16v v in 40v bw=10khz to 2mhz electrical specifications rev. e 5/08 4 1 2 3 4 5 6 7 8 +v in = 28v, i out = 333ma, t a =t c =25c unless otherwise specified. guaranteed by design but not tested. typical parameters are representative of actual device performance but are for reference only. industrial grade and "e" suffix devices shall be tested to subgroups 1 and 4 unless otherwise specified. military grade devices ("h" suffix) shall be 100% tested to subgroups 1, 2, 3 and 4. subgroups 5 and 6 testing available upon request. subgroup 1, 4 t a =t c =+25c 2, 5 t a =t c =+125c 3, 6 t a =t c = -55c device has internal shutdown feature that pulses the output with a low duty cycle during faults. consult dscc smd for electrical parameters for devices purchased as such. notes: capacitive load isolation short circuit current limit switching frequency vout adjustment range vdc vdc ma ma ma ma mvrms mvrms map-p map-p mv mv mv mv % % mv mv s s mv mv s s mv mv ms ms s s ms v v ma ma f m w a khz % min. 14.90 14.70 333 333 360 360 - - - - - - - - 63 61 - - - - - - - - - - - - - - - 16 11 - - - 100 0.40 375 10 output voltage output voltage ripple input current ripple line regulation load regulation efficiency step load response step load recovery step line response step line recovery start up overshoot start up delay shutdown delay parameter test conditions 1 max. 15.10 15.30 - - - - 60 100 125 200 25 50 25 50 - - 600 750 200 200 500 500 200 200 200 200 60 60 500 500 60 40 50 50 2.5 300 - 1.5 425 - dac2815s dac2815s h/e input voltage range output current units typ. 15.00 15.00 - - - - 15 - 76 - 5 - 5 - 68 - 400 - 100 - 200 - 90 - 0 0 40 - 250 - 40 - - 35 1.25 - - 0.95 400 - group a subgroup 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 1 2,3 4 5,6 4 5,6 4 5,6 4 5,6 4 5,6 4 5,6 4 5,6 - 1,2,3 1,2,3 1,2,3 1,2,3 1,2,3 1 1 4 1 7 2 min. 14.85 - 333 - 360 - - - - - - - - - 63 - - - - - - - - - - - - - - - - 16 11 - - - 100 0.40 375 10 max. 15.15 - - - - - 60 - 125 - 30 - 30 - - - 600 - 200 - 500 - 200 - 200 - 60 - 500 - 60 40 50 50 2.5 300 - 1.5 425 - typ. 12.0 - - - - - 15 - 76 - 5 - 5 - 68 - 400 - 100 - 200 - 90 - 0 - 40 - 250 - 40 - - 35 1.25 - - 0.95 400 - shutdown recovery quiescent current 2 2 2 2 2 2 dac2815s 2
application notes power supplies the output voltage of the dac2812s and dac2815s may be adjusted from 90% to 110% of nominal value by the use of a 150k w potentiometer as shown. adjustment beyond this range is possible however certain characteristics of the con- verter such as but not limited to input voltage range, efficiency, ripple and temperature performance will change. characteriza- tion by the user is recommended in such applications. adjust/comp (pin 4) may be driven by external circuitry refer- enced to pin 2 (-output) if desired. grounding pin 4 causes voltage to increase (25% typically) while driving pin 4 above 1.3v 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 w or more if connection of the comp func- tion is also required. the comp function of pin 4 allows load transient response to be tailored to suit specific application requirements. this fea- ture may be utilized by connecting a 10 or less nf capacitor between pins 4 and 1. note: the dac2812s and dac2815s use pin 4 while the dhc2803s and dhc2805s use pin 3. rev. e 5/08 5 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 the pin 7 (-input). shutdown may be implemented by simply connecting pin 5 to an open collector logic output or switch rated at 2.5ma, 25vdc or higher. input voltage turn on point is programmed with a single resis- tor 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= (10% accuracy at 25c) set point temperature coefficient is typically +400ppm/c. output fault monitoring is accomplished by observing pin 5 with a high impedance monitoring circuit. pin 5 voltage drops from over 10v to below 1v when a load fault causes the con- verters fault protection circuitry to activate. it will remain low for at least 100ms and return high. if the load fault is still present pin 5 will return low and the cycle will repeat. a resis- tor >400k w from pin 5 to 7 provides pull down for pin 5 if there is no input setpoint programming resistor already in place. 210103 e to -9.5 load fault response the msk families of dc-dc converters share load fault phi- losophies. load fault conditions include short-circuit and se- vere overload conditions. the dac2800s converter series re- sponds to load faults by turning off all power conversion cir- cuits for 250ms and then attempting to restart for 10ms (typi- cal). the net "on" duty factor during a fault is very low result- ing 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 con- verters.
rev. e 5/08 6 typical application circuit
typical performance curves rev. e 5/08 7 dac2812s
typical performance curves rev. e 5/08 8 dac2815s
mechanical specifications 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) 701-6572 www.mskennedy.com rev. e 5/08 9 note: all dimensions are 0.010 inches unless otherwise labeled. esd triangle indicates pin 1. ordering information screening level part number dac2812s dac2812se dac2812sh 5962-93093 5962-94631 dac2815s dac2815se dac2815sh output voltage industrial extended reliability mil-prf-38534 class h dscc-smd dscc-smd industrial extended reliability mil-prf-38534 class h 12v 15v contains internal beo (beryllium oxide) weight=14.2 grams typical
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