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4707 dey road liverpool, n.y. 13088 (315) 701-6751 all ceramic capacitors surface mount magnetics mil std 461c cr03 (dc-dc converters) 80 volt input transient tolerent wide supply range - 16v to 50v high isolation - 500v high power density - 17w/in3 output voltage adjustment - standard remote shutdown operates to 14v input at 10w available with 3.3v, 5v, 12v and 15v outputs contact msk for mil-prf-38534 qualification status mil-prf-38534 certified facility m.s.kennedy corp. 20w dc-dc converters bbf2800s description: the bbf2800s series of dc-dc converters provides the ruggedness, reliability and features required to meet the advanced design challenges of today's hi-rel market. this has been accomplished using a package having very low thermal gradients, excellent hermeticity and high voltage isolation. the use of advanced substrate and reflow soldering techniques during construction results in a rugged, cost-effective pin solderable package. the bbf2800s hybrid converter series utilizes all ceramic capacitors and surface mount magnetics to provide reliable operation at all operating temperatures while surviving very high g forces. bbf2800s series standard features include kelvin sense, indefinite short circuit protection, remote shutdown, output fault monitoring, turn on voltage point adjustment, switching frequency synchronization of up to 3 units using no external components and pi-network input filtering. an output voltage adjustment/load compensation pin is also standard. fault tolerance design protects these converters from most external circuit faults. the output and output adjust pins will withstand +35v while the shutdown and all synchronization pins will withstand +50v protecting the converters from a variety of system or board faults, i.e. 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. the bbf2800 series is a current mode push-pull topology converter which operates at a switching frequency of 500khz. internal filtering of both input and output eliminates the need for external capacitors in many applications. the 12-pin power dip package allows connection to a heatsink and is hermetically sealed and isolated from the internal circuits. 1 series features: 8548-34 rev. h 4/12
notes: continuous operation above the absolute maximum ratings may adversly effect the device performance and/or life cycle. equivalent schematic isolated step down power supply microprocessor power source low voltage subsystem power source typical applications 1 2 3 4 5 6 +input shutdown plus clock adjust/comp -output +output pin-out information -input timing 2 timing 1 case -sense +sense 12 11 10 9 8 7 -65c to +150c 300c see efficiency curve 150c 6.5c/w absolute maximum ratings +50v 80v 5.5a 4.0a 1.9a 1.5a -55c to +125c -40c to +85c input voltage (pin 7 to pin 6) input transient (pin 7 to pin 6 @ 50ms) output current bbf2803s bbf2805s bbf2812s bbf2815s case temperature range bbf2800s h bbf2800s 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 jc 2 1 1 8548-34 rev. h 4/12
i out =2.75a to/from 5.50a transition time=30 s i out =2.75a to/from 5.50a transition time=30 s v in =16v to/from 40v transition time=30 s v in =16v to/from 40v transition time=30 s p out =18w max. disabled i out =0ma no effect on dc performance input to output or any pin to case @ 500v r pot =50k 16v v in 40v bw=10khz to 2mhz bw=10khz to 2mhz v in =16v to 40v i out =0.5a to 5.5a i out =5.5a i out =5.5a enabled, i out =0ma capacitive load isolation short circuit current limit switching frequency vout adjustment range electrical specifications vdc vdc ma ma mvrms mvrms marms marms mv mv mv mv % % mv mv s s mv mv s s mv mv ms ms s s ms v ma ma ma f m a khz % min. 3.20 3.15 500 500 - - - - - - - - 61 58 - - - - - - - - - - - - - - - 16 - - - - 100 5.5 475 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. 3.40 3.45 5500 5500 50 60 50 60 20 50 15 40 - - 600 800 200 300 750 1000 200 300 300 500 60 100 500 550 60 40 40 50 2.5 300 - 8.5 525 - bbf2803s bbf2803s h input voltage range output current units typ. 3.30 - - - 20 - 20 - 2 - 1 - 66 - 400 - 100 - 500 - 80 - 0 - 30 - 120 - 20 - 35 - 1.25 - - 7.8 500 - group a subgroup 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 1 4 1 7 2 min. 3.18 - 500 - - - - - - - - - 61 - - - - - - - - - - - - - - - - 16 - - - - 100 5.5 475 10 max. 3.42 - 5500 - 60 - 60 - 25 - 20 - - - 700 - 220 - 800 - 220 - 300 - 60 100 500 - 60 40 40 - 2.5 300 - 8.5 525 - typ. 3.30 - - - 20 - 20 - 2 - 1 - 66 - 400 - 100 - 500 - 80 - 0 - 30 - 120 - 20 - 35 - 1.25 - - 7.8 500 - 3 shutdown recovery quiescent current 2 2 2 2 2 2 bbf2803s 1 2 3 4 5 6 7 8 +v in = 28v, i out = 5.5a, 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 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. at case temperatures above 90c, the bbf2803 requires vin>16v to support a 5.5a load. at 125c, 18v input is required to support 5.5a output; 16v will support 4a output at 125c. notes: 2 8 2 2 2 8548-34 rev. h 4/12
i out =2a to/from 4a transition time=30 s i out =2a to/from 4a transition time=30 s v in =16v to/from 40v transition time=30 s v in =16v to/from 40v transition time=30 s p out =20w max. disabled i out =0ma no effect on dc performance input to output or any pin to case @ 500v r pot =50k 16v v in 40v bw=10khz to 2mhz bw=10khz to 2mhz v in =16v to 40v i out =0.4a to 4.0a i out =4.0a i out =4.0a enabled, i out =0ma capacitive load isolation short circuit current limit switching frequency vout adjustment range electrical specifications vdc vdc ma ma mvrms mvrms marms marms mv mv mv mv % % mv mv s s mv mv s s mv mv ms ms s s ms v ma ma ma f m a khz % min. 5.00 4.90 400 400 - - - - - - - - 65 58 - - - - - - - - - - - - - - - 16 - - - - 100 4.0 475 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. 5.10 5.20 4000 4000 50 60 50 60 25 50 25 50 - - 1000 1500 200 300 800 1100 200 300 400 800 60 100 500 550 60 40 40 50 2.5 300 - 7.0 525 - bbf2805s bbf2805s h input voltage range output current units typ. 5.05 - - - 20 - 20 - 5 - 2 - 72 - 700 - 100 - 500 - 80 - 0 - 30 - 120 - 20 - 35 - 1.25 - - 6.0 500 - group a subgroup 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 1 4 1 7 2 min. 4.95 - 400 - - - - - - - - - 65 - - - - - - - - - - - - - - - - 16 - - - - 100 4.0 475 10 max. 5.15 - 4000 - 60 - 60 - 50 - 50 - - - 1200 - 220 - 900 - 220 - 400 - 60 100 500 - 60 40 40 - 2.5 300 - 7.0 525 - typ. 5.05 - - - 20 - 20 - 5 - 2 - 72 - 700 - 100 - 500 - 80 - 0 - 30 - 120 - 20 - 35 - 1.25 - - 6.0 500 - 4 shutdown recovery quiescent current 2 2 2 2 2 2 bbf2805s 1 2 3 4 5 6 7 +v in = 28v, i out = 4.0a, 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 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. notes: 2 2 2 2 8548-34 rev. h 4/12
i out =0.95a to/from 1.9a transition time=30 s i out =0.95a to/from 1.9a transition time=30 s v in =16v to/from 40v transition time=30 s v in =16v to/from 40v transition time=30 s p out =22.8w max. disabled i out =0ma no effect on dc performance input to output or any pin to case @ 500v r pot =50k 16v v in 40v bw=10khz to 2mhz bw=10khz to 2mhz v in =16v to 40v i out =0.19a to 1.9a i out =1.9a i out =1.9a enabled, i out =0ma capacitive load isolation short circuit current limit switching frequency vout adjustment range electrical specifications vdc vdc ma ma mvrms mvrms marms marms mv mv mv mv % % mv mv s s mv mv s s mv mv ms ms s s ms v ma ma ma f m a khz % min. 12.00 11.80 190 190 - - - - - - - - 67 58 - - - - - - - - - - - - - - - 16 - - - - 100 1.9 475 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. 12.10 12.30 1900 1800 50 60 40 50 50 100 50 100 - - 1200 1600 200 300 500 800 200 300 400 1500 60 100 500 550 60 40 40 50 2.5 300 - 3.4 525 - bbf2812s bbf2812s h input voltage range output current units typ. 12.05 - - - 25 - 20 - 5 - 5 - 74 - 700 - 100 - 300 - 70 - 0 - 20 - 120 - 20 - 35 - 1.25 - - 2.8 500 - group a subgroup 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 1 4 1 7 2 min. 11.95 - 190 - - - - - - - - - 67 - - - - - - - - - - - - - - - - 16 - - - - 100 1.9 475 10 max. 12.15 - 1900 - 60 - 40 - 60 - 60 - - - 1400 - 220 - 550 - 220 - 500 - 60 - 500 - 60 40 40 - 2.5 300 - 3.4 525 - typ. 12.05 - - - 25 - 20 - 5 - 5 - 74 - 700 - 100 - 300 - 70 - 0 - 20 - 120 - 20 - 35 - 1.25 - - 2.8 500 - 5 shutdown recovery quiescent current 2 2 2 2 2 2 bbf2812s 1 2 3 4 5 6 7 +v in = 28v, i out = 1.9a, 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 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. notes: 2 2 2 2 8548-34 rev. h 4/12
i out =0.75a to/from 1.50a transition time=30 s i out =0.75a to/from 1.50a transition time=30 s v in =16v to/from 40v transition time=30 s v in =16v to/from 40v transition time=30 s p out =22.5w max. disabled i out =0ma no effect on dc performance input to output or any pin to case @ 500v r pot =50k 16v v in 40v bw=10khz to 2mhz bw=10khz to 2mhz v in =16v to 40v i out =0.15a to 1.5a i out =1.5a i out =1.5a enabled, i out =0ma capacitive load isolation short circuit current limit switching frequency vout adjustment range electrical specifications vdc vdc ma ma mvrms mvrms marms marms mv mv mv mv % % mv mv s s mv mv s s mv mv ms ms s s ms v ma ma ma f m a khz % min. 15.00 14.80 150 150 - - - - - - - - 68 58 - - - - - - - - - - - - - - - 16 - - - - 100 1.5 475 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. 15.20 15.40 1500 1400 50 60 40 50 50 125 50 125 - - 1200 1700 200 300 500 800 200 300 400 1500 60 100 500 550 60 40 40 50 2.5 300 - 3.0 525 - bbf2815s bbf2815s h input voltage range output current units typ. 15.10 - - - 25 - 20 - 10 - 20 - 73 - 800 - 100 - 300 - 80 - 0 - 20 - 120 - 20 - 35 - 1.25 - - 2.4 500 - group a subgroup 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 1 4 1 7 2 min. 14.95 - 150 - - - - - - - - - 68 - - - - - - - - - - - - - - - - 16 - - - - 100 1.5 475 10 max. 15.25 - 1500 - 60 - 40 - 60 - 60 - - - 1400 - 220 - 550 - 220 - 500 - 60 - 500 - 60 40 40 - 2.5 300 - 3.0 525 - typ. 15.10 - - - 25 - 20 - 10 - 20 - 73 - 800 - 40 - 300 - 80 - 0 - 20 - 120 - 30 - 35 - 1.25 - - 2.4 500 - 6 shutdown recovery quiescent current 2 2 2 2 2 2 bbf2815s 1 2 3 4 5 6 7 +v in = 28v, i out = 1.5a, 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 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. notes: 2 2 2 2 8548-34 rev. h 4/12
application notes power supplies the output voltage of the bbf2800s may be adjusted from 90% to 110% of nominal value by the use of a 50k 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 refer- enced to pin 8 (-output sense) if desired. grounding pin 4 causes output voltage to increase (25% typically) while driving pin 4 above 1.3v causes output voltage to decrease. 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 transient response and phase margin to be tailored to suit a specific application. this feature may be utilized by connecting a small (1-500nf) capaci- tor between pins 4 and 6 or 7. this is generally recommended when very large low esr load capacitances are used. 7 shutdown plus pin 2 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 2 is necessary for normal operation of the converter. pin 2 is referenced to pin 12 (-input). shutdown may be implemented by simply connecting pin 2 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 2 to 12. 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 2 with a high impedance monitoring circuit. pin 2 voltage drops from over 10v to below 1v when a load fault causes the converters fault protection circuitry to activate. it will remain low for at least 100ms and return high. if the load fault is still present pin 2 will return low and the cycle will repeat. if there is no input setpoint programming resistor already in place a resistor >400k from pin 2 to 12 will provide pin 2 pull down. 210103 e to -9.5 multiple converter synchronization synchronized operation of up to three bbf2800s series con- verters may be accomplished without external components. one unit selected to be the master is connected normally with pin 10 grounded. the clock output pin 3 will provide the sync sig- nal for up to two slave units. the slave units have pin 10 not connected and receive the clock signal into pin 11. the clock signal lines may be shielded to prevent radiation. a separate 50 ohm coax to each slave unit is recommended in order to pre- serve signal integrity. shield ends should be connected to pin 12 of the nearest converter. bbf2800s converters may also be synchronized to an exter- nal 500 khz (+/- 5%) frequency source driving pin 11 of the converters. pin 10 is not connected. the converters synchronize to the positive edge of the frequency source allowing a variety of wave forms (pulse, square, spike) to be used. pin 11 is internally capacitively coupled allowing unipolar or bipolar fre- quency sources to be used. the source should have a waveform rise time of 20 ns or less and be capable of driving at least 4 volts peak into each 50 ohm pin 11 input (50 volts peak max). an externally synchronized unit may be used to synchronize other (slave) units. the slave units may be used in turn to synchronize other slave units from their pin 3 outputs. each ?generation? of slave units has a delay (100-200ns typical) from the unit that it is synchronizing to. 8548-34 rev. h 4/12
8 typical application circuit the above diagram shows the remote sense feature which reduces vo errors due to the resistance of the conductors feeding the load. this diagram also shows the connections for non-synchronized operation (timing 1 and 2) as well as output voltage trim, remote shutdown, fault monitoring, and input voltage turn on point adjustment. 8548-34 rev. h 4/12
typical performance curves 9 bbf2803s 0.0 6.0 output current, i out (a) 10 12 14 16 18 20 low line drop out input voltage, v in (v) 2.0 4.0 10k 90k 60k 20k 30k 40k input voltage, v in (v) time, t (500 sec/div) load transient response 1000 f line transient response efficiency contours 16 30 40 35 20 25 output response, x (units/div) output current, i out (a) 4.4 .55 1.1 2.2 3.3 5.5 set point resistor, r sp ( ) time, t (5msec/div) 12 16 20 24 28 turn on threshold turn on voltage, e to (v) turn on response 100 200 400 frequency, f (hz) ?00 audio rejection audio rejection, a v (db) 0 ?0 ?0 1k 2k 10k 20k 100k ?0 ?0 response, x (units/div) 3.3v 0v 0v 28v v out v in temp = 25 c 40% 50% 56% 60% 64% 66% 67% 68% 69% 66% 70% input voltage, v in (v) efficiency contours 16 30 40 35 20 25 output current, i out (a) temp = 125 c 40% 50% 60% 64% 66% 67% 68% 69% 70% 64% input voltage, v in (v) efficiency contours 16 30 40 35 20 25 output current, i out (a) 4.4 1.1 .55 2.2 3.3 5.5 4.4 1.1 .55 2.2 3.3 5.5 temp = ?5 c 30% 40% 50% 54% 58% 60% 62% 64% 65% 66% 67% includes 1000 f on output bus time, t (200 sec/div) time, t (200 sec/div) load transient response 100 f output response, x (units/div) output response, x (units/div) load = 5.5a load = 5.5a includes 100 f on output bus includes 100 f on output bus includes 100 f on output bus time, t (100 sec/div) load transient response output response, x (units/div) 5.5a 5.5a 5.5a 2.75a 2.75a 2.75a v out v out v out v in 16v 40v v out i out i out i out 1 v 2 a 1 v 2 a 100mv 10v 1 v 10 v 2 v 2 a no output bus capcitance v in = 28vdc i out = 5.5 amps output dc current rating temp = 25 c 8548-34 rev. h 4/12
typical performance curves 10 bbf2805s 0.0 5.0 output current, i out (a) 10 12 14 16 18 20 low line drop out input voltage, v in (v) 1.0 2.0 3.0 4.0 10k 90k 70k 20k 30k 40k50k input voltage, v in (v) time, t (500 sec/div) load transient response 1000 f line transient response efficiency contours 16 30 40 35 20 25 output response, x (units/div) output current, i out (a) 3.2 .4 .8 1.6 2.4 4 set point resistor, r sp ( ) time, t (5msec/div) 12 16 20 24 28 turn on threshold turn on voltage, e to (v) turn on response 100 200 400 frequency, f (hz) ?00 audio rejection audio rejection, a v (db) 0 ?0 ?0 1k 2k 10k 20k 100k ?0 ?0 response, x (units/div) 5.1v 0v 0v 28v v out v in temp = 25 c 30% 40% 50% 60% 68% 70% 63% 66% 71% 72% 73% input voltage, v in (v) efficiency contours 16 30 40 35 20 25 output current, i out (a) 3.2 .4 .8 1.6 2.4 4 temp = 125 c 30% 50% 60% 64% 67% 67% 69% 70% 71% 72% 73% 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% includes 1000 f on output bus time, t (200 sec/div) time, t (200 sec/div) load transient response 100 f output response, x (units/div) output response, x (units/div) includes 100 f on output bus includes 100 f on output bus includes 100 f on output bus time, t (100 sec/div) load transient response output response, x (units/div) 4a 4a 4a 2a 2a 2a v out v out v out v in 16v 40v load 4a load 4a v out i out i out i out 1 v 1 a 1 v 1 a 100mv 10v 1 v 10 v 2 v 1 a no output bus capcitance v in = 28vdc i out = 4 amps output dc current rating temp = 25 c 8548-34 rev. h 4/12
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. contact msk for mil-prf-38534 qualification status. m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com 11 note: all dimensions are 0.010 inches unless otherwise labeled. esd triangle indicates pin 1. bbf2812s the above example is an industrial grade 12v single output converter ordering information screening blank= industrial; h= mil-prf-38534 class h single output output voltage 03=3.3v; 05=5v; 12=12v; 15=15v nominal input voltage general part number contains internal beo (beryllium oxide) weight=61 grams typical 8548-34 rev. h 4/12

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