www.irf.com 1 hybrid-high reliability dc-dc converter ahv28xx series description 80v transient input (100 msec max.) 50vdc input (continous) 16v to 40vdc input range single, dual and triple outputs 15w output power (no temperature derating) low input / output noise full military temperature range wideband pwm control loop magnetic feedback low profile hermetic package (0.405?) short circuit and overload protection constant switching frequency (500khz) true hermetic package (parallel seam welded, ceramic pin feedthru) standard microcircuit drawings available features ahv 28v input, single, dual and triple output the ahv series of dc-dc converters are designed to replace the ahe/ato family of converters in applications requiring compliance to mil-std-704a through e, in particular the input surge requirement of 80v specified to withstand transient input voltage of 80v. no input voltage or output power derating is necessary over the full military temperature range. these converters are packaged in an extremely rugged, low profile package that meets all requirements of mil- std-883 and mil-prf-38534. parallel seam weld sealing and the use of ceramic pin feed thru seals assure long term hermeticity after exposure to extended temperature cycling. the basic circuit is a push-pull forward topology using power mosfet switches. the nominal switching frequency is 500khz. a unique current injection circuit assures current balancing in the power switches. all ahv series converters use a single stage lc input filter to attenuate input ripple current. a low power 11.5v series regulator provides power to an epitaxial cmos custom pulse width modulator integrated circuit. this single integrated circuit provides all pwm primary circuit functions. power is transferred from primary to secondary through a ferrite core power transformer. an error voltage signal is generated by comparing a highly stable reference voltage with the converter output voltage and drives the pwm through a unique wideband magnetic feedback circuit. this proprietary feedback circuit provides an extremely wide bandwidth, high gain control loop, with high phase margin. the feedback control loop gain is insensitive to temperature, radiation, aging, and variations in manufacturing. the transfer function of the feedback circuit is a function of the feedback transformer turns ratio which cannot change when subjected to environmental extremes. manufactured in a facility fully qualified to mil-prf-38534, these converters are fabricated utilizing dla qualified processes. for available screening options, refer to device screening table in the data sheet. variations in electrical, mechanical and screening can be accommodated. contact ir san jose for special requirements. pd-94583b
2 www.irf.com ahv28xx series (28v input- single, dual and triple output) specifications (single output models) t case = -55c to +125c, v in = +28v 5% unless otherwise specified notes to specifications (single output models) 1. bandwidth guaranteed by design. tested for 20khz to 2mhz. 2. capacitive load may be any value from 0 to the maximum limit without affecting dc performance. a capacitive load in excess of the maximum limit will not disturb loop stability but will interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. 3. parameter shall be tested as part of design characterization and after design or process changes. thereafter shall be guar anteed to the limits specified. 4. an overload is that condition with a load in excess of the rated load but less than necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 5. load step transition time between 2 s to 10 s. 6. recovery time is measured from the initiation of the transient to where v out has returned to within 1% of v out at 50% load. 7. input step transition time between 2 s and 10 s. 8. turn on delay time measurement is for either a step application of power at input or the removal of a ground signal from t he inhinbit pin (pin 2) while power is applied to the input. above 125 c case temperature, derate output power linearly to 0 at 135 c case. input voltage -0.5v to +50vdc (continous), 80v (100 msec) power output internally limited, 17.5w typical soldering temperature 300c for 10 seconds (1 pin at a time) operating case temperature -55c to +125c storage case temperature -65c to +135c absolute maximum ratings ahv2805s ahv2812s ahv2815s test symbol condition -55 c t c +125 c, v in = 28 v dc 5%, c l =0, unless otherwise specified group a subgroups min max min max min max units static characteristics output v out v in = 16, 28, and 40 vdc 1 4.95 5.05 11.88 12.12 14.85 15.15 v voltage i out = 0 2,3 4.90 5.10 11.76 12.24 14.70 15.30 v current i out v in = 16, 28, and 40 vdc 1,2,3 0.0 3.00 0.0 1.25 0.0 1.00 a ripple voltage 1 v rip v in = 16, 28, and 40 vdc 1,2,3 60 60 60 mvp-p bw = dc to 1 mhz power p out v in = 16, 28, and 40 vdc 1,2,3 15 15 15 w regulation line load vrline vrload v in = 16, 28, and 40 vdc i out = 0, half load and full load vin = 16, 28, and 40 vdc i out = 0, half load and full load 1 2,3 1,2,3 5.0 25 50 30 60 120 35 75 150 mv input current ripple current i in i rip i out = 0, inhibit (pin 2) = 0 i out = 0, inhibit (pin 2) = open i out = full load 1,2,3 1,2,3, 18 50 50 18 50 50 18 50 50 ma ma map-p efficiency e ff i out = full load t c = +25 c 1 72 72 72 % isolation iso input to output or any pin to case (except pin 8) at 500 vdc tc = +25 c 1 100 100 100 m ? capacitive load 2,3 c l no effect on dc performance tc = +25 c 4 500 200 200 f load fault power dissipation p d overload, tc = +25 c 4 short circuit, tc = +25 c 1 8.5 8.5 8,5 8.5 8.5 8.5 w switching frequency f s i out = full load 4 450 550 450 550 450 550 khz dynamic characteristics step load changes output transient 5 recovery 5,6 vot load tt load 50% load 135 100% load no load 135 50% 50% load 135 100% no load 335 50% load 50% load 335 no lload 4 4 4 4 4 -300 -500 +300 +500 70 200 5.0 -300 -750 +300 +750 70 1500 5.0 -300 -750 +300 +750 70 1500 5.0 mvpk mvpk s s ms step line changes output transient recovery vot line tt line input step 16 to 40 vdc 3,7 input step 40 to 16 vdc 3,7 input step 16 to 40 vdc 3,6,7 input step 40 to 16 vdc 3,6,7 4 4 4 4 300 -1000 800 800 500 -1500 800 800 500 -1500 800 800 mvpk mvpk s s turn-on overshoot delay vton os t on d i out = oa and full load i out = o and full load 8 4,5,6 4,5,6 550 10 750 10 750 10 mvpk ms load fault recovery tr lf v in = 16 to 40 vdc 4,5,6 10 10 10 ms
www.irf.com 3 ahv28xx series (28v input- single, dual and triple output) for notes to specifications, refer to page 5 specifications (dual output models) t case = -55c to +125c, v in = +28v 5% unless otherwise specified input voltage -0.5v to +50vdc (continous), 80v (100 msec) power output internally limited, 17.5w typical soldering temperature 300c for 10 seconds (1 pin at a time) operating case temperature -55c to +125c storage case temperature -65c to +135c absolute maximum ratings ahv2805d ahv2812d ahv2815d test symbol condition -55 c t c +125 c, v in = 28 v dc 5%, c l =0, unless otherwise specified group a subgroups min max min max min max units static characteristics output voltage 1 v out i out = 0 1 2,3 4.95 4.90 5.05 5.10 11.88 11.76 12.12 12.24 14.85 14.70 15.15 15.30 v v current 1,2 i out v in = 16, 28, and 40 vdc 1,2,3 0.0 1500 0.0 625 0.0 500 ma ripple voltage 1,3 v rip v in = 16, 28, and 40 vdc 1,2,3 60 60 60 mvp-p bw = dc to 2 mhz power 1, 2,4 p out v in = 16, 28, and 40 vdc 1,2,3 15 15 15 w regulation line 1,5 load 1 vr line i out vr load v in = 16, 28, and 40 vdc i out = 0, half load and full load vin = 16, 28, and 40 vdc i out = 0, half load and full load 1 2,3 1,2,3 30 60 120 30 60 120 35 75 150 mv input current ripple current 3 i in i rip i out = 0, inhibit (pin 2) tied to input return (pin 10) i out = 0, inhibit (pin 2) = open i out = full load bw = dc to 2mhz 1,2,3 1,2,3, 18 65 50 18 65 50 18 65 50 ma ma map-p efficiency e ff i out = full load t c = +25 c 1 72 72 72 % isolation iso input to output or any pin to case (except pin 8) at 500 vdc, tc = +25 c 1 100 100 100 m ? capacitive load 6,7 c l no effect on dc performance tc = +25 c 4 200 200 200 f load fault power dissipation p d overload, tc = +25 c 8 short circuit, tc = +25 c 1 10 10 8,5 8.5 8.5 8.5 w switching frequency f s i out = full load 4 450 550 450 550 450 550 khz dynamic characteristics step load changes output transient 9 recovery 9,10 vot load tt load 50% load 135 100% load no load 135 50% 50% load 135 100% no load 335 50% load 50% load 335 no lload 4 4 4 4 4 -300 -500 +300 +500 70 1000 5.0 -300 -500 +300 +500 70 1500 5.0 -300 -500 +300 +500 70 1500 5.0 mvpk mvpk s s ms step line changes output transient 7,11 recovery 7,10, 11 vot line tt line input step 16 to 40 vdc input step 40 to 16 vdc input step 16 to 40 vdc input step 40 to 16 vdc 4 4 4 4 300 1000 4800 4800 1200 -1500 4.0 4.0 1500 -1500 4.0 4.0 mvpk mvpk s s turn-on overshoot 1 delay 1, 12 vton os t on d i out = o and full load i out = o and full load 4,5,6 4,5,6 750 10 600 10 600 10 mvpk ms load fault recovery 7 tr lf 4,5,6 10 10 10 ms
4 www.irf.com ahv28xx series (28v input- single, dual and triple output) for notes to specifications, refer to page 5 specifications (triple output models) t case = -55c to +125c, v in = +28v 5% unless otherwise specified input voltage -0.5v to +50vdc (continous), 80v (100 msec) power output internally limited, 17.5w typical soldering temperature 300c for 10 seconds (1 pin at a time) operating case temperature -55c to +125c storage case temperature -65c to +135c absolute maximum ratings ahv2812t ahv2815t test symbol condition -55 c t c +125 c, v in = 28 v dc 5%, c l =0, unless otherwise specified group a subgroups min max min max units static characteristics output voltage 1 v out i out = 0 (main) i out = 0 (dual) 1 1 2,3 1 2,3 4.95 4.90 11.88 11.76 5.05 5.10 12.12 12.24 4.95 4.90 14.85 14.70 5.05 5.10 15.15 15.30 v v v v current 1,2,3 i out v in = 16, 28, and 40 vdc (main) 1,2,3 0.0 2000 0.0 2000 ma ripple voltage 1,4 v rip v in = 16, 28, and 40 vdc (dual) 1 v in = 16, 28, and 40 vdc 1,2,3 1,2,3 0.0 208 80 0.0 167 80 ma mvp-p bw = dc to 2 mhz (main) v in = 16, 28, and 40 vdc bw = dc to 2 mhz (main) 1,2,3 40 40 mvp-p power 1,2,3 p out v in = 16, 28, and 40 vdc (main) (+dual) (-dual) (total) 1,2,3 1,2,3 1,2,3 1,2,3 10 2.5 2.5 15 10 2.5 2.5 15 w w w w regulation line 1,3 load 1,3 vr line vr load v in = 16, 28, and 40 vdc i out = 0, 50%, and 100% load (main) i out = 0, 50%, and 100% load (dual) v in = 16, 28, and 40 vdc i out = 0, 50%, and 100% load (main) i out = 0, 50%, and 100% load (dual) 1,2,3 25 60 50 60 25 75 50 75 mv input current ripple current 4 i in i rip i out = 0, inhibit (pin 8) tied to input return (pin 10) i out = 0 inhibit (pin 2) = open i out = 2000 ma (main) i out = 208ma ( 12v) i out = 167ma ( 15v) bw = dc to 2mhz 1,2,3 1,2,3 1,2,3 15 50 50 15 50 50 ma ma map-p efficiency e ff i out = 2000ma (main) i out = 208ma ( 12v) i out = 167ma ( 15v) 1 72 72 % isolation iso input to output or any pin to case (except pin 7) at 500 vdc, tc = +25 c 1 100 100 m ? capacitive load 6,7 c l no effect on dc performance tc = +25 c (main) (dual) 4 500 200 500 200 f load fault power dissipation 3 p d overload, tc = +25 c 5 short circuit, tc = +25 c 1 1 8.5 8.5 8.5 8.5 w switching frequency 1 f s i out = 2000ma (main) i out = 208ma ( 12v) i out = 167ma ( 15v) 4 450 550 450 550 khz
www.irf.com 5 ahv28xx series (28v input- single, dual and triple output) notes to specifications (triple output models) specifications (triple output models) - continued 1. tested at each output. 2. parameter guaranteed by line and load regulation tests. 3. at least 25% of the total power should be taken from the (+5v) main output. 4. bandwidth guaranteed by design. tested for 20khz to 2mhz. 5. an overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circu it protection and is the condition of maximum power dissipation. 6. capacitive load may be any value from 0 to the maximum limit without affecting dc performance. a capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appea ring as a short circuit during turn-on. 7. parameter shall be tested as part of design characterization and after design or process changes. thereafter parameters shall be guaranteed to the limits specified. 8. above 125 c case temperature, derate output power linearly to 0 at 135 c case. 9. load step transition time between 2 s and 10 s. 10. recovery time is measured from the initiation of the transient to where v out has returned to within 1% of v out at 50% load. 11. input step transition time between 2 s and 10 s. 12. turn on delay time measurement is for either a step application of power at input or the removal of a ground signal from t he inhibit pin (pin 8) while power is applied to the input. notes to specifications (dual output models) 1. tested at each output. 2. parameter guaranteed by line and load regulation tests. 3. bandwidth guaranteed by design. tested for 20khz to 2mhz. 4. total power at both outputs. 5. when operating with unbalanced loads, at least 25% of the load must be on the positive output to maintain regulation. 6. capacitive load may be any value from 0 to the maximum limit without affecting dc performance. a capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appea ring as a short circuit during turn-on. 7. parameter shall be tested as part of design characterization and after design or process changes. thereafter parameters shall be guaranteed to the limits specified. 8. an overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circu it protection and is the condition of maximum power dissipation. 9. load step transition time between 2 s and 10 s. 10. recovery time is measured from the initiation of the transient to where v out has returned to within 1% of v out at 50% load. 11. input step transition time between 2 s and 10 s. 12. turn on delay time measurement is for either a step application of power at input or the removal of a ground signal from the inhibit pin (pin 2) while power is applied to the input. 13. above 125 c case temperature, derate output power linearly to 0 at 135 c. ahv2812t ahv2815t test symbol condition -55 c t c +125 c, v in = 28 v dc 5%, c l =0, unless otherwise specified group a subgroups min max min max units dynamic characteristics step load changes output transient 9 recovery 9,10 vot load tt load 50% load 135 100% load no load 135 50% 50% load 135 100% no load 335 50% load 50% load 335 no lload 4 4 4 4 4 -300 -400 +300 +400 100 2000 5.0 -300 -400 +300 +400 100 2000 5.0 mvpk mvpk s s ms step line changes output transient recovery 7,10, 11 vot line tt line input step 16 to 40 vdc input step 40 to 16 vdc input step 16 to 40 vdc input step 40 to 16 vdc 4 4 4 4 1200 -1500 4.0 4.0 1200 -1500 4.0 4.0 mvpk mvpk s s turn-on overshoot 1 delay 1,12 vton os t on d i out = o and 625ma i out = o and 625ma 4 4 750 15 750 15 mvpk ms load fault recovery 7 tr lf 4 15 15 ms
6 www.irf.com ahv28xx series (28v input- single, dual and triple output) application information emi filter inhibit function connecting the inhibit pin (pin 2 of single and dual models, pin 8 of triple models) to the input return (pin 10) will cause the converter to shutdown and operate in a low power standby mode. power consumption in this mode is calculated by multiplying vin times the input current inhibited, typically 225mw at vin equal to 28v. the input current inhibited is relatively constant with changes in vin. the open circuit inhibit pin voltage is typically 11.5v and can be conveniently driven by an open collector driver. an internal pull-up resistor enables the user to leave this pin floating if the inhibit function is not used in their particular application. all models use identical inhibit internal circuits. forcing inhibit pin to any voltage between 0v and 6v will assure the converter is inhibited. the input current to this pin is 500 a maximum at vpin2 = to 0v. the converter can be turned on by opening pin 2 or forcing a voltage from 10v to 50v. inhibit pin current from 10v to 50v is less than 50 a. an optional emi filter ( afc461) will reduce the input ripple current to levels below the limits imposed by mil-std- 461 ceo3. the output voltage of the ahv28xxs can be adjusted upward by connecting a resistor between the output adjust (pin 3) and the output common (pin 4) as shown in table 1. table 1: output adjustment resistor values * output adjust (single output models only) output voltage increase (%) * resistance (ohms) pin 3 to 4 5v 12v 15v none 0 0 0 390 k +1.0% +1.6% +1.7% 145 k +2.0% +3.2% +3.4% 63 k +3.1% +4.9% +5.1% 22 k +4.1% +6.5% +6.8% 0 +5.0% +7.9% +8.3% standard microcircuit drawing equivalence table standard microcircuit vendor cage ir standard drawing number code part number 5962-91773 52467 ahv2805s 5962-92112 52467 ahv2812s 5962-92113 52467 ahv2815s 5962-92114 52467 ahv2812d 5962-92115 52467 ahv2812t 5962-92116 52467 ahv2815t
www.irf.com 7 ahv28xx series (28v input- single, dual and triple output) figure 1. (single output) block diagram figure 2. (dual output) block diagram figure 3. (triple output) block diagram +vout pulse width modulator emi filter 1 10 +input enable input input return error amp & ref v adj fb drive 1 drive 2 2 5 output return 4 3 8 case +vout output return pulse width modulator emi filter 1 10 +input enable input input return fb drive 1 drive 2 error amp & reference 5 -vout regulator 8 case 3 4 2 5+vout output return pulse width modulator emi filter 1 10 +input enable input input return fb drive 1 drive 2 error amp & reference 4 -vout regulator +5 vout 7 case 3 2 8
8 www.irf.com ahv28xx series (28v input- single, dual and triple output) pin designation mechnical outlines single and dual output model 0.040 d x 0.26 l pins 2.560 1.110 2.880 max 4 x 0.400 =1.600 2.110 max 0.405 max 0.050 typical 0.800 ? 0.162 2 holes typical 610 9 8 7 123 5 4 triple output model 610 9 8 7 123 5 4 1.000 1.95 0.410 max 2.70 0 max 2.360 1.345 * output adjust (single output models only) pin # single output dual output triple output 1 + input + input + input 2 enable input enable input + 5vdc output 3 output adjust * + output output return 4 output return output return - dual output (12/15vdc) 5 + output - output + dual output (12/15vdc) 6nc nc nc 7 nc nc case ground 8 case ground case ground enable input 9nc nc nc 10 input return input return input return
www.irf.com 9 ahv28xx series (28v input- single, dual and triple output) part numbering notes: best commercial practice sample tests at low and high temperatures -55c to +105c for ahe, ato, atw ahv 28 15 t f /ch model input voltage nominal 28 = 28v output voltage single ? 05 = 5v, 12 =12v, 15 =15v dual ? 05 = 5v,12 = 12v, 15 = 15v triple ? 12 = 5v, 12v 15 = 5v, 15v output s = single d = dual t = triple package style f = flange screening level (please refer to screening table) no suffix, es, hb, ch device screening requirement mil-std-883 method no suffix es hb ch temperature range -20c to +85c -55c to +125c -55c to +125c -55c to +125c element evaluation mil-prf-38534 n/a n/a n/a class h non-destructive bond pull internal visual 2017 yes yes yes temperature cycle 1010 n/a cond b cond c cond c constant acceleration 2001, y1 axis n/a 500 gs 3000 gs 3000 gs pind 2020 n/a n/a n/a n/a burn-in 1015 n/a 48 hrs@hi temp 160 hrs@125c 160 hrs@125c final electrical mil-prf-38534 25c 25c -55c, +25c, -55c, +25c, ( group a ) & specification +125c +125c pda mil-prf-38534 n/a n/a n/a 10% seal, fine and gross 1014 cond a cond a, c cond a, c cond a, c radiographic 2012 n/a n/a n/a n/a external visual 2009 yes yes yes n/a n/a 2023 n/a n/a world headquarters: 101 n sepulveda blvd, el segundo, california 90245, tel: (310) 252-7105 ir san jose: 2520junction avenue, san jose, california 95134, tel: (408) 434-5000 visit us at www.irf.com for sales contact information . data and specifications subject to change without notice. 04/2015
|
