PD - 94541 AHF28XX SERIES ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS 28V Input, Single and Dual Output Description The AHF Series of DC/DC converters feature single or dual outputs over the full military temperature range. No derating in output power is required, making them suitable for use in rugged military applications. The low profile, small outline package is ideally suited to the tight board space requirements of many industrial and aerospace applications. Designed for nominal 28Vdc inputs, this family of converters will meet the requirements of MIL-STD-704D. The basic circuit utilizes a pulse width modulated, feed-forward topology at a nominal switching frequency of 550KHz. Input to output isolation is achieved through the use of transformers in the forward and feedback circuits. The proprietary magnetic feedback circuit provides for an extremely wide bandwidth control loop with a high phase margin. The closed loop frequency response of this converter family extends to approximately 50KHz, resulting in superior line and load transient characteristics. This feedback method is also inherently temperature and radiation insensitive. This gives the AHF Series an important advantage over converters that incorporate opto-couplers in their design. These converters are manufactured in a facility certified to MIL-PRF-38534. All processes used to manufacture these converters have been qualified to enable Advanced Analog to deliver compliant devices. Four screening grades are available to satisfy a wide range of requirements. The CH grade converters are fully compliant to MIL-PRF-38534 class H. The HB grade converters are processed to full MIL-PRF-38534 screening but do not have class H element evaluation as required by MIL-PRF-38534. Two grades are fully tested and operate the full military temperature range without derating of output power. Industrial and commercial grades are also available. Variations are electrical, mechanical and screening can be accommodated. www.irf.com AHF Features n 16 to 40 VDC Input Range (28 VDC Nominal) n Single and Dual Outputs n 12 Watts Output Power n 22.8 W/in3 Power Density n Low Input / Output Noise (50mA/60mVp-p max. respectively) n Indefinite Short Circuit and Overload Protection n Wideband Control Loop for Superior Transient Characterstics n No Derating for -55°C to +125°C Opertation n Constant Switching Frequency (550KHz Nominal) Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact Advanced Analog with specific requirements. 1 10/08/02 AHF28XX Series Specifications n AHF2805S ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table I. Electrical Performance Characteristics Test Symbol Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified Limits Group A Subgroups Device Types 1 2,3 01 Unit Min Max 4.95 4.90 5.05 5.10 V Output voltage VOUT IOUT = 0 Output current1 IOUT VIN = 16, 28, and 40 V dc 1,2,3 01 2400 mA Output ripple voltage2 VRIP VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2MHz 1,2,3 01 60 mV p-p Line regulation VRLINE VIN = 16, 28, and 40 V dc, Iout = 0, 500, and 1000 mA 1,2,3 01 25 mV Load regulation VRLOAD VIN = 16, 28, and 40 V dc, IOUT = 0, 500, and 1000 mA 1,2,3 01 50 mV IIN IOUT = 0, inhibit (pin 1) tied to input return (pin 7) IOUT = 0, inhibit (pin 1) = open 1,2,3 01 12 1,2,3 01 1 2,3 01 76 74 % 100 MΩ Input current mA 30 Input ripple current2 IRIP IOUT = 1000mA B.W. = 20 Hz to 2MHz Efficiency EFF IOUT = 1000mA Isolation ISO Input to output or any pin To case (except pin 6) at 500V dc Tc = +25°C 1 01 Capacitive load3,4 CL No effect on dc performance, Tc = +25°C 4 01 500 µF Power dissipation load fault PD Overload 5 Short circuit 1 1,2,3 01 01 6 2 W Switching frequency FS IOUT = 1000mA 4,5,6 01 600 kHz 50 500 mA p-p For Notes to Specifications, refer to page 3 2 www.irf.com AHF28XX Series AHF2805S Table I. Electrical Performance Characteristics - continued Test Output response to step transient load changes6 Symbol VOTLOAD Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Limits Group A Subgroups Device Types Min Max Unit 1200 mA to/from 2400mA 4,5,6 01 -300 +300 mV pk 0 mA to/from 1200mA 4,5,6 -500 +500 mV pk Recovery time step transient load changes6.7 TTLOAD 1200 mA to/from 2400mA 0 mA to 1200 mA 500 mA to 0 mA 4,5,6 4,5,6 4,5,6 01 70 1200 8 µs ms ms Output response to transient step line changes VOTLINE Input step 16 V to/from 40 V dc, IOUT = 2400mA 4, 8 4,5,6 01 500 mV pk Recovery time transient step line changes TTLINE Input step 16 V to/from 40Vdc IOUT = 2400mA 4, 7, 8 4,5,6 01 800 µs Turn on overshoot VTonOS IOUT = 0 and 2400mA 4,5,6 01 600 mV pk 4,5,6 01 20 ms 4,5,6 01 20 ms 35 grams Turn on delay TonD Load fault recovery4,9 TrLF Weight IOUT = 0 and 2400mA 9 Notes to Specifications 1. Parameter guaranteed by line and load regulation tests. 2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. 3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. 4. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the limits specified in Table I. 5. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 6. Load step transition time between 2 and 10 microseconds. 7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 8. Input step transition time between 2 and 10 microseconds. 9. Turn-on delay time measurement is for either a step application of power at the input or the removal of ground signal from the inhibit pin (pin 1) while power is applied to the input is unlimited. www.irf.com 3 AHF28XX Series Specifications n AHF2812S ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table II. Electrical Performance Characteristics Test Symbol Conditions -55°C ≤Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified Output voltage VOUT IOUT = 0 Output current1 IOUT Output ripple voltage2 VRIP Group A Subgroups Limits Device Types Unit Min Max 11.88 11.76 12.12 12.24 V 1 2,3 01 VIN = 16, 28, and 40 V dc 1,2,3 01 1000 mA VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2MHz 1,2,3 01 60 mV p-p Line regulation VRLINE VIN = 16, 28, and 40 V dc, Iout = 0, 500, and 1000 mA 1,2,3 01 50 mV Load regulation VRLOAD VIN = 16, 28, and 40 V dc, IOUT = 0, 500, and 1000 mA 1,2,3 01 50 mV IIN IOUT = 0, inhibit (pin 1) tied to input return (pin 7) IOUT = 0, inhibit (pin 1) = open 1,2,3 01 12 1,2,3 01 1 2,3 01 78 75 % 100 MΩ Input current mA 50 Input ripple current2 IRIP IOUT = 1000mA B.W. = 20 Hz to 2MHz Efficiency EFF IOUT = 1000mA Isolation ISO Input to output or any pin to case (except pin 6) at 500V dc Tc = +25°C 1 01 Capacitive load3,4 CL No effect on dc performance, Tc = +25°C 4 01 500 µF Power dissipation load fault PD Overload 5 Short circuit 1 1,2,3 01 01 6 2 W Switching frequency FS IOUT = 1000mA 4,5,6 01 600 kHz 50 500 mA p-p For Notes to Specifications, refer to page 5 4 www.irf.com AHF28XX Series Table II. Electrical Performance Characteristics - continued Test Symbol Output response to step transient load changes6 VOTLOAD Recovery time step transient load changes6,7 TTLOAD Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified 50 mA to/from 1000mA Group A Subgroups Device Types 4 5,6 4 5,6 01 50 mA to/from 1000mA 0 mA to 500 mA 4,5,6 4,5,6 01 500 mA to 0 mA 4,5,6 0 mA to/from 500mA AHF2812S Unit Limits Min Max -300 -450 -500 -750 +300 +450 +500 +750 mV pk 100 1500 µs 10 ms Output response to transient step line changes VOTLINE Input step 16 V to/from 40 V dc, IOUT =1000mA 4, 8 4,5,6 01 1500 mV pk Recovery time transient step line changes TTLINE Input step 16 V to/from 40Vdc IOUT =1000mA 4, 7, 8 4,5,6 01 800 µs IOUT = 0 and 1000mA 4,5,6 01 600 mV pk IOUT = 0 and 1000mA 9 4,5,6 01 20 ms 4,5,6 01 20 ms 35 grams Turn on overshoot VTonOS Turn on delay TonD Load fault recovery4,9 TrLF Weight Notes to Specifications 1. Parameter guaranteed by line and load regulation tests. 2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. 3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. 4. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the limits specified in Table II. 5. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 6. Load step transition time between 2 and 10 microseconds. 7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 8. Input step transition time between 2 and 10 microseconds. 9. Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 1) while power is applied to the input is unlimited. www.irf.com 5 AHF28XX Series Specifications n AHF2815S ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table III. Electrical Performance Characteristics Test Symbol Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Output voltage VOUT IOUT = 0 Output current1 IOUT Output ripple voltage2 VRIP Line regulation Load regulation Input current VRLINE Group A Subgroups Limits Device Types Unit Min Max 14.85 14.70 15.15 15.30 V 1 2,3 All VIN = 18, 28, and 40 V dc 1,2,3 All 2000 mA VIN = 18, 28, and 40 V dc, B.W. = 20 Hz to 2 MHz 1,2,3 All 50 mV p-p 1 2,3 All ±35 ±75 mV 1,2,3 All ±150 mV 1,2,3 All 18 50 mA 1,2,3 All 20 mA p-p 1 2,3 All 80 77 % 100 MΩ VIN = 18, 28, and 40 V dc, Iout = 0, 1000, and 2000 mA VRLOAD VIN = 18, 28, and 40 V dc, IOUT = 0, 1000, and 2000 mA IIN IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open Input ripple current2 IRIP IOUT = 2000mA, B.W. = 20 Hz to 2 MHz Efficiency EFF IOUT = 2000mA Isolation ISO Input to output or any pin to case (except pin 7) at 500 V dc Tc = +25°C 1 All 4 All 200 µF 6 2 W Capacitive load3,4 CL No effect on dc performance, Tc = +25°C Power dissipation load fault PD Overload 5 Short circuit 1 1,2,3 All All Switching frequency FS IOUT = 2000mA 4,5,6 01, 04 02, 05 03, 06 250 250 275 300 270 300 kHz For Notes to Specifications, refer to page 7 6 www.irf.com AHF28XX Series AHF2815S Table III. Electrical Performance Characteristics - continued Test Symbol Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Group A Subgroups Device Types Unit Limits Min Max -800 +800 -1000 +750 Output response to step transient load Changes VOTLOAD 6 Recovery time step 1000 mA to/from 2000mA 4,5,6 0 mA to/from 1000mA 4,5,6 4 TTLOAD transient load 1000 mA to/from 2000mA Changes6,7 0 mA to/from 1000 mA All All 100 5,6 4 All 5,6 Output response to transient step line mV pk 200 µs 5 ms 10 04 VOTLINE Input step 18 V to/from 4,5,6 -1000 +1000 mV pk 500 µs 05 40 V dc, IOUT = 2000mA 4, 8 changes 06 Recovery time transient step line 04 TTLINE Input step 18 V to/from 40Vdc 4,5,6 05 IOUT = 2000mA 4, 7, 8 changes 06 Turn on overshoot VTonOS Turn on delay TonD Load fault TrLF IOUT = 0 and 2000mA 4,5,6 All 750 mV pk IOUT = 0 and 2000mA 9 4,5,6 All 12 ms 4,5,6 All 12 ms 38 grams recovery4,9 Weight Notes to Specifications 1. Parameter guaranteed by line and load regulation tests. 2. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. 3. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn-on. 4. Parameter shall be tested as part of design characterization and after design or process changes. Thereafter, parameters shall be guaranteed to the limits specified in Table III. 5. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 6. Load step transition time between 2 and 10 microseconds. 7. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 8. Input step transition time between 2 and 10 microseconds. 9. Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 2) while power is applied to the input is unlimited. www.irf.com 7 AHF28XX Series Specifications n AHF2805D ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table IV. Electrical Performance Characteristics Test Symbol Output voltage VOUT Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified IOUT = 0 Group A Subgroups 1 01 2,3 Output current1,2 Limits Device Types Unit Min Max ±4.95 ±5.05 ±4.90 ±5.10 0.12 1.08 A V VIN = 16, 28, and 40 V dc, IOUT Output ripple each output 1,2,3 01 1,2,3 01 60 mV p-p 1,2,3 01 30 mV 1,2,3 01 30 mV 1,2,3 01 ±10 % 1,2,3 01 12 mA VIN = 16, 28, and 40 V dc, voltage3 VRIP B.W. = 20 Hz to 2 MHz VIN = 16, 28, and 40 V dc, Line regulation4 VRLINE Iout = 0, 1200, and 2400 mA VIN = 16, 28, and 40 V dc, Load regulation4 VRLOAD IOUT = 0, 1200, and 2400 mA 10 percent to 90 percent Cross regulation5 VRcros load change IOUT = 0, inhibit (pin 1) Input current IIN tied to input return (pin 7) IOUT =0, inhibit (pin 1) = open Input ripple IRIP current3,4 Efficiency IOUT = 2400mA B.W. = 20 Hz to 2 MHz 4 EFF 60 IOUT = 2400mA, TC =+25°C 1,2,3 01 1,3 50 mA p-p 75 2 01 72 % 1 01 100 MΩ 4 01 Input to output or any pin Isolation ISO to case (except pin 6) at 500V dc, TC = +25°C No effect on dc 6,7 Capacitive load CL performance, TC = +25°C, 200 µF total for both outputs For Notes to Specifications, refer to page 9 8 www.irf.com AHF28XX Series AHF2805D Table IV. Electrical Performance Characteristics - continued Test Power dissipa- Symbol PD tion load fault Switching frequency4 Output response to step transient load changes4,9 Recovery time step transient load changes4,9,10 FS Device Types 1,2,3 IOUT = 2400mA 1200 mA to/from 2400mA 4,5,6 4,5,6 0 mA to/from 1200 mA 4,5,6 1200 mA to/from 2400mA 4,5,6 Unit Limits Min VOTLOAD Max 6 01 2 W 01 500 600 kHz 01 -400 -800 +400 +800 mV pk 01 70 µs TTLOAD VOTLINE Recovery time transient step line changes4,7,10,11 TTLINE Load fault recovery7 Group A Subgroups Short circuit, TC = +25°C Output response transient step line changes4,7,11 Turn on overshoot4 Turn on delay4,12 Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Overload, TC = +25°C 8 VTonOS TonD TrLF Weight 0 mA to/from 1200 mA 4,5,6 Input step from/to 16 to 40 V dc, IOUT =2400mA 100 4,5,6 01 Input step from/to 16 to 40 V dc, IOUT =2400mA 4,5,6 IOUT =0 and 2400mA IOUT = 0 and 2400mA -400 +400 mV pk 01 1200 µs 4,5,6 01 600 mV pk 4,5,6 01 25 ms 4,5,6 01 25 ms 38 grams Notes to Specifications 1. Parameter guaranteed by line load and cross regulation tests. 2. Up to 90 percent of full power is available from either output provided the total output does not exceed 12W. 3. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. 4. Load current split equally between +VOUT and –VOUT. 5. 1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output. 6. Capacitive load may be any value from 0 to the maximum limit without compromising 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, appearing 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 in Table IV. 8. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 9. Load step transition time between 2 and 10 microseconds. 10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 11. Input step transition time between 2 and 10 microseconds. 12. Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 1) while power is applied to the input. www.irf.com 9 AHF28XX Series Specifications n AHF2812D ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table V. Electrical Performance Characteristics Test Output voltage Symbol VOUT Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified IOUT = 0 Group A Subgroups 1 01 2,3 Output current1,2 Unit Min Max ±11.88 ±12.12 ±11.76 ±12.24 100 900 mA V VIN = 16, 28, and 40 V dc, IOUT each output VRIP B.W. = 20 Hz to 2 MHz Output ripple voltage3 Limits Device Types 1,2,3 01 1,2,3 01 60 mV p-p 1,2,3 01 30 mV 1,2,3 01 30 mV 1,2,3 01 3.0 % 1,2,3 01 12 mA VIN = 16, 28, and 40 V dc, VIN = 16, 28, and 40 V dc, Line regulation4 VRLINE Load regulation4 VRLOAD Cross regulation5 VRcros Iout = 0, 500, and 1000 mA VIN = 16, 28, and 40 V dc, IOUT = 0, 500, and 1000 mA 10 percent to 90 percent load change IOUT = 0, inhibit (pin 1) Input current IIN tied to input return (pin 7) IOUT =0, inhibit (pin 1) = open Input ripple IRIP current3,4 Efficiency IOUT = 1000mA B.W. = 20 Hz to 2 MHz 4 EFF 60 IOUT = 1000mA, TC =+25°C 1,2,3 01 1,3 50 mA p-p 77 2 01 74 % 1 01 100 MΩ 4 01 Input to output or any pin Isolation ISO to case (except pin 6) at 500V dc, TC = +25°C No effect on dc Capacitive load6,7 CL performance, TC = +25°C, 200 µF total for both outputs For Notes to Specifications, refer to page 11 10 www.irf.com AHF28XX Series AHF2812D Table V. Electrical Performance Characteristics - continued Test Power dissipa- Symbol PD tion load fault Switching frequency4 Output response to step transient load changes4,9 Recovery time step transient load changes4,9,10 FS Limits Device Types Min 1,2,3 IOUT = 1000mA 500 mA to/from 1000mA 4,5,6 4,5,6 0 mA to/from 500 mA 4,5,6 500 mA to/from 1000mA 4,5,6 VOTLOAD Unit Max 6 01 2 W 01 500 600 kHz 01 -200 -800 +200 +800 mV pk 01 70 µs TTLOAD VOTLINE Recovery time transient step line changes4,7,10,11 TTLINE Load fault recovery7 Group A Subgroups Short circuit, TC = +25°C Output response transient step line changes4,7,11 Turn on overshoot4 Turn on delay4,12 Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Overload, TC = +25°C 8 VTonOS TonD TrLF Weight 0 mA to/from 500 mA 4,5,6 Input step from/to 16 to 40 V dc, IOUT =1000mA 1000 4,5,6 01 Input step from/to 16 to 40 V dc, IOUT =1000mA 4,5,6 IOUT =0 and 1000mA IOUT = 0 and 1000mA -750 +750 mV pk 01 1200 µs 4,5,6 01 600 mV pk 4,5,6 01 25 ms 4,5,6 01 25 ms 38 grams Notes to Specifications 1. 2. 3. 4. 5. 6. Parameter guaranteed by line load and cross regulation tests. Up to 90 percent of full power is available from either output provided the total output does not exceed 12W. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. Load current split equally between +VOUT and –VOUT. 1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive oad in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing 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 in Table V. 8. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 9. Load step transition time between 2 and 10 microseconds. 10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 11. Input step transition time between 2 and 10 microseconds. 12. Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 1) while power is applied to the input. www.irf.com 11 AHF28XX Series Specifications n AHF2815D ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300°C for 10 seconds Operating -55°C to +125°C Storage -65°C to +135°C Table VI. Electrical Performance Characteristics Test Symbol Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified Output voltage VOUT IOUT = 0 Output current1,2 IOUT Output ripple voltage3 Group A Subgroups Limits Device Types Unit Min Max 1 2,3 01 ±14.85 ±14.70 ±15.15 ±15.30 V VIN = 16, 28, and 40 V dc, each output 1,2,3 01 80 720 mA VRIP VIN = 16, 28, and 40 V dc, B.W. = 20 Hz to 2 MHz 1,2,3 01 60 mV p-p Line regulation4 VRLINE VIN = 16, 28, and 40 V dc, Iout = 0, 400, and 800 mA 1,2,3 01 35 mV Load regulation4 VRLOAD VIN = 16, 28, and 40 V dc, IOUT = 0, 400, and 800 mA 1,2,3 01 35 mV Cross regulation5 VRcros 10 percent to 90 percent load change each output 1,2,3 01 3.0 % IIN IOUT = 0, inhibit (pin 1) tied to input return (pin 7) IOUT = 0, inhibit (pin 1) = open 1,2,3 01 12 mA 1,2,3 01 1,3 2 01 78 75 % 1 01 100 MΩ 4 01 Input current Input ripple current3,4 IRIP IOUT = 800mA B.W. = 20 Hz to 2 MHz Efficiency4 EFF IOUT = 800mA Isolation ISO Capacitive load6,7 CL Input to output or any pin to case (except pin 6) at 500 V dc, TC = +25°C No effect on dc performance, TC = +25°C, total for both outputs 55 50 200 mA p-p µF For Notes to Specifications, refer to page 13 12 www.irf.com AHF28XX Series Table VI. Electrical Performance Characteristics - continued Test Power dissipation load fault Switching frequency4 Symbol Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified 8 Group A Subgroups AHF2815D Limits Device Types Min PD Overload Short circuit 1,2,3 01 FS IOUT = 800 mA 4,5,6 01 Unit Max 6 2 W 500 600 kHz -200 -800 +200 +800 mV pk µs Output response to step transient load changes4,9 VOTLOAD 400 mA to/from 800 mA 0 mA to/from 400 mA 4,5,6 4,5,6 01 01 Recovery time step transient load changes4,9,10 TTLOAD 400 mA to/from 800 mA 4,5,6 01 70 0 mA to/from 400 mA 4,5,6 01 500 Input step from/to 16 to 40 V dc, IOUT=800mA 4,5,6 01 Output response transient step line changes4,7,11 Recovery time transient step line changes4,7,10,11 Turn on overshoot4 Turn on delay4,12 Load fault recovery7 VOTLINE -750 +750 mV pk TTLINE Input step from/to 16 to 40Vdc, IOUT =800mA 4,5,6 01 1200 µs VTonOS IOUT=0 and 800mA IOUT = 0 and 800mA 4,5,6 01 750 mV pk TonD 4,5,6 01 25 ms TrLF 4,5,6 01 25 ms 38 grams Weight Notes to Specifications 1. 2. 3. 4. 5. 6. Parameter guaranteed by line load and cross regulation tests. Up to 90 percent of full power is available from either output provided the total output does not exceed 12W. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. Load current split equally between +VOUT and –VOUT. 1.2 watt load on output under test, 1.2 watt to 10.8 watt load change on other output. Capacitive load may be any value from 0 to the maximum limit without compromising 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, appearing 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 in Table VI. 8. An overload is that condition with a load in excess of the rated load but less than that necessary to trigger the short circuit protection and is the condition of maximum power dissipation. 9. Load step transition time between 2 and 10 microseconds. 10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1 percent of VOUT at 50 percent load. 11. Input step transition time between 2 and 10 microseconds. 12. Turn-on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin (pin 1) while power is applied to the input. www.irf.com 13 AHF28XX Series AHF28XX ( Single Output ) Block Diagram EMI F ilter 8 + Input 4 + V o ut U n der-V o ltag e D e tec tor 3 P rim a ry H o use kee ping S u pply 1 E n able R e turn 6 D rive C a se P u lse W idth FB M odu lato r CS E rror Amp & Ref In put R e turn 7 AHF28XX ( Dual Output ) Block Diagram EMI Filter 8 +Input 2 +V out U nder-V oltage D etector 1 E nable 6 C ase 3 R eturn P rim ary H ousekeeping S upply 4 -V out D rive P ulse W idth FB M odulator CS E rror Amp & R ef Input R eturn 7 14 www.irf.com AHF28XX Series Application Information Inhibit Function Connecting the enable input (Pin 1) to input common (Pin 7) will cause the converter to shut down. It is recommended that the enable pin be driven by an open collector device capable of sinking at least 400 µA of current. The open circuit voltage of the enable input is 15 ±1 VDC. If the inhibit function is not used, this input can be left unconnected because it is internally pulled-up. Hence, if TAMBIENT = +25°C, the DC/DC converter case temperature will be approximately 100°C if no heat sink or air flow is provided. To calculate the heat sink area required to maintain a specific case temperature rise, the above equation may be manipulated as follows: Thermal Management Assuming that there is no forced air flow, the package temperature rise above ambient (∆T) may be calculated using the following expression: ∆T ≈ 80 A –0.7p 0.85 (°C) A HEAT SINK ∆Τ 0.85 80Ρ −1.43 − Α PKG As an example, if a maximum case temperature rise of 50°C rise above ambient is desired, then the required effective heat sink area is: where A = the effective surface area in square inches (including heat sink if used), P = power dissipation in watts. The total surface area of the AHF package is 4.9 square inches. If a worse case full load efficiency of 78% is assumed, then the case temperature rise can be calculated as follows: = Α HEATSINK 50 = 0.85 80(3.4) −1.43 − 4.9 = 3.75in. 2 1 1 P = POUT − 1 = 12 − 1 = 3.4W 0.78 Eff ∆T = 80 (4.9)-0.7 (3.4)0.85 = 74°C www.irf.com 15 AHF28XX Series AHF28XX Case Outlines Non-Flanged 0 .2 0 5 (5 .2 1 ) 0 .0 3 0 d ia ., 8 p in s (0 .7 6 0 ) 8 1 0 .9 0 5 (2 2 .9 9 ) 2 7 0 .5 0 5 (1 2 .8 3 ) 1 .1 0 5 (2 8 .0 7 ) 3 1 .4 5 0 (3 6 .8 3 ) 4 6 0 .7 0 5 (1 7 .9 1 ) 5 0 .8 0 0 (2 0 .3 2 ) 0 .0 9 0 R T y p (2 .2 9 0 ) 1 .1 2 0 (2 8 .4 5 ) 0 .2 6 0 (6 .6 0 0 ) 0 .3 3 0 (8 .3 8 0 ) MAX Flanged Pin Designation AHF28XXS Pin No. 16 Designation Part Numbering AHF 28 05 S F / CH AHF28XXD Pin No. Designation M od el S creening Inpu t V oltage 1 Enable 1 Enable 2 N/C 2 + Output 3 Output Return 3 Output Return 4 + Output 4 - Output 5 N/C 5 N/C 6 Case 6 Case 7 Input Return 7 Input Return 8 + Input 8 + Input 28 = 28V O utput V oltage 5 = ±5 , 1 2 = ±1 2 , 1 5 = ±1 5 – , ES, H B, CH P ackage O ption s F = F la n g e O m it fo r S ta n d a rd O utputs S = S in g le D = Dual www.irf.com AHF28XX Series Available Screening Levels and Process Variations for AHF28XX Series Requirement Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual MIL-STD-883 Method No Suffix -20 to +85°C ES Suffix -55°C to +125°C HB Suffix -55°C to +125°C CH Suffix -55°C to +125°C MIL-PRF-38534 2017 1010 ∗ 2001 Yes Cond B Yes Cond C Yes Cond C 500g Cond A Cond A 1015 MIL-PRF38534 48hrs @ 85°C 25°C 48hrs @ 125°C 25°C 160hrs @ 125°C -55, +25, +125°C 160hrs @ 125°C -55, +25, +125°C 1014 ∗ Cond A, C Cond A, C Cond A, C 2009 ∗ Yes Yes Yes * Per Commercial Standards Available Standard Military Drawing (SMD) Cross Reference Standardized Military Drawing Pin 5962-9160001 5962-9456801 5962-9456301 5962-9211101 5962-9235101 Vendor CAGE Code 52467 52467 52467 52467 52467 Vendor Similar Pin AHF2805S/CH AHF2812S/CH AHF2815S/CH AHF2812D/CH AHF2815D/CH WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 322 3331 ADVANCED ANALOG: 2270 Martin Av., Santa Clara, California 95050, Tel: (408) 727-0500 Visit us at www.irf.com for sales contact information. Data and specifications subject to change without notice. 10/02 www.irf.com 17