5962-9210902HZX

PD - 94557 ATW28XXD SERIES ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS Description The ATW28XXD Series of DC/DC converters feature high power density and an extended temperature range for use in military and industrial applications. Designed to MIL-STD-704 input requirements, these devices operate with a nominal 28 VDC inputs with ±12V and ±15V dual outputs to satisfy a wide range of requirements. The circuit design incorporates a pulse width modulated push-pull topology operating in the feed-forward mode at a nominal switching frequency of 270KHz. Input to output isolation is achieved through the use of transformers in the forward and feedback circuits. The advanced feedback design provides fast loop response for superior line and load transient characteristics and offers greater reliability and radiation tolerance than devices incorporating optical elements in the feedback circuits. Three standard temperature grades are offered. Refer to Part Number section for more severe environments. Manufactured in a facility fully qualified to MIL-PRF38534, these converters are available in four screening grades to satisfy a wide range of requirements. The CH grade is fully compliant to the requirements of MILPRF-38534 for class H. The HB grade is processed and screened to the class H requirement, but may not necessarily meet all of the other MIL-PRF-38534 requirements, e.g., element evaluation and Periodic Inspection (PI) not required. Both grades are tested to meet the complete group “A” test specification over the full military temperature range without output power deration. Two grades with a more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog for special requirements. 28V Input, Dual Output ATW Features n 18 to 40 VDC Input Range (28 VDC Nominal) n ±12V and ±15V Outputs Available n Indefinite Short Circuit and Overload Protection 3 n 22.8 W/in Power Density n 30 W Output Power n Fast Loop Response for Superior Transient Characteristics n Operating Temperature Range from -55°C to +125°C Available n Popular Industry Standard Pin-Out n Resistance Seam Welded Case for Superior Long Term Hermeticity n Efficiencies up to 85% n Shutdown from External Signal n Full Military Screening n 200,000 hour MTBF at 85°C n MIL-PRF-38534 Compliant Versions Available www.irf.com 1 10/24/02 ATW28XXD Series Specifications ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature ATW2812D -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 IOUT = 0 VIN = 18, 28, and 40 V dc, each output VIN = 18, 28, and 40 V dc, B.W. = 20Hz to 2MHz VIN = 18, 28, and 40 V dc, Iout = 0,1250, and 2500mA VIN = 18, 28, and 40 V dc, IOUT = 0, 1250, and 2500mA 10% to 90% load change IOUT = 0, inhibit (pin 8) tied to input return (pin 10) IOUT = 0,inhibit (pin 8)= open IOUT = 2500mA B.W. = 20Hz to 2MHz IOUT = 2500mA TC = +25°C Input to output or any pin to case (except pin 7) at 500 V dc Tc = +25°C No effect on dc performance, Tc = +25°C, total for both outputs 8 Overload, TC = +25°C Short circuit, TC = +25°C IOUT = 2500mA Group A Subgroups Device Types Limits Unit Output voltage Output current 1, 2 VOUT IOUT 3 1 2,3 1,2,3 1,2,3 1 2,3 1,2,3 1,2,3 1,2,3 All All All All Min ±11.88 ±11.76 250 Max ±12.12 ±12.24 2250 85 30 60 120 3.5 18 50 50 V mA mVp-p mV Output ripple voltage Line regulation 4 VRIP VRLINE Load regulation 4 VRLOAD 5 All All All mV % mA Cross regulation Input current VRCROSS IIN 3, 4 Input ripple current Efficiency Isolation 6, 7 4 IRIP EFF ISO 1,2,3 1 1 All All All 80 100 mAp-p % MΩ Capacitive load CL PD 4 4 All 200 µF Power dissipation load fault Switching frequency 1 All 12 9 300 270 300 +400 W FS 4,5,6 Output response to step transient load 4, 9 changes Recovery time step transient load 4, 9, 10 changes VOTLOAD 1250mA to/from 2500mA 4,5,6 01 02 03 All 250 250 275 -400 KHz mV pk TTLOAD 0mA to/from 2500mA 1250mA to/from 2500mA 4,5,6 4,5,6 All All -800 +800 70 µs 0mA to/from 1250mA 1250mA to/from 0mA 4,5,6 4,5,6 All All 500 5 ms For Notes to Specifications, refer to page 3 2 www.irf.com ATW28XXD Series Table I. Electrical Performance Characteristics - continued Test Symbol Conditions -55°C ≤Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Input step from/to 18 to 40 Vdc, IOUT = 2500mA Input step from/to 18 to 40 Vdc, IOUT = 2500mA IOUT = 0 and 2500mA IOUT = 0 and 2500mA Group A Subgroups Device Types Limits ATW2812D Unit Min Output response transient step line 4, 7, 11 changes Recovery time transient step line 4, 7, 10, 11 change Turn on overshoot 4, 12 Turn on delay VOTLINE 4,5,6 All -800 Max +800 mV pk TTLINE 4 4,5,6 All 4000 µs VTonOS TonD 7 4,5,6 4,5,6 4,5,6 All All All 750 14 14 75 mV pk ms ms grams Load fault recovery Weight TrLF Flange Notes to Specifications 1 2 3 4 5 6 Parameter guaranteed by line, load and cross regulation tests. Up to 90% of full power is available from either output provided the total output does not exceed 30W. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. Load current split equally between +VOUT and –VOUT. Three-watt load on output under test, 3 watt to 27 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. 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. 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. Load step transition time between 2 and 10 microseconds. 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. Input step transition time between 2 and 10 microseconds. 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 8) while power is applied to the input. 7 8 9 10 11 12 www.irf.com 3 ATW28XXD Series Specifications ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature ATW2815D -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 VIN = 18, 28, and 40 Vdc IOUT = 0 VIN = 18, 28, and 40 V dc VIN = 18, 28, and 40 V dc, B.W. = DC to MHz VIN = 18, 28, 40 Vdc VIN = 18, 28, and 40 V dc, Iout = 0, 1000, and 2000mA VIN = 18, 28, and 40 V dc, IOUT = 0, 1000, and 2000mA IOUT = 0, inhibit (pin 8) IOUT = 0, inhibit (pin 8) = open IOUT = 2000mA IOUT = 2500mA TC = 25°C Input to output or any pin to case (except pin 8) at 500V dc Tc = 25°C No effect on dc performance, Tc = 25°C 3 Overload, TC = +25°C Short circuit, TC = +25°C IOUT = 2000mA Group A Subgroups Device Types Limits Unit Output voltage Output current 8 Output ripple voltage Output Power 9, 10 Line regulation 9, 10 4, 11 11, 13 VOUT IOUT VRIP POUT VRLINE 1 2,3 1,2,3 1,2,3 1,2,3 1 2,3 1,2,3 1,2,3 1,2,3 1,2,3 1 1 All All All All All All All All All All All All All Min ±14.85 ±14.70 0.200 Max ±15.15 ±15.30 2000 85 VDC VDC mADC mVp-p W mV mV mV mADC mADC mAp-p % MΩ µF W W KHz KHz KHz mV pk 30 35 75 150 12 30 60 80 100 Load regulation Input current VRLOAD IIN IRIP EFF ISO Input ripple current Efficiency Isolation 6, 12 Capacitive load CL PD 4 1 1 1,2,3 1,2,3 1,2,3 4,5,6 All All All 01 02 03 All 500 9 9 263 245 265 +300 Power dissipation load fault Switching frequency FS Output response to step transient 7, 9, 10 load changes VOTLOAD 50% load to/from 100% load 237 230 250 -300 Recovery time step 1, 7 transient load changes TTLOAD No load to 100% load 100% load to no load 50% load to/from 100% load No load to 50% load 50% load to no load 4,5,6 4,5,6 4,5,6 4,5,6 4,5,6 All All All All All -800 +800 -800 +800 25 500 7 mV pk mV pk µs µs ms For Notes to Specifications, refer to page 5 4 www.irf.com ATW28XXD Series Table II. Electrical Performance Characteristics - continued Test Symbol Conditions -55°C ≤Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified Input step from/to 18 to 40VDC Input step from 40 to18 VDC Input step from/to 18 to 40 VDC Input step from 40 to 18 VDC IOUT = 0 and 2000mA IOUT = 0 and 2000mA VIN = 18 to 40 VDC Flange Group A Subgroups Device Types Limits ATW2815D Unit Min Output response transient step line 5, 12 changes Recovery time transient step line 1. 5, 12 changes Turn on overshoot 2 Turn on delay Load fault recovery Weight 12 Max +180 mV pk VOTLINE 4,5,6 All TTLINE 4,5,6 4,5,6 All All -600 400 mV pk µs µs mV pk ms ms grams VTonOS TonD TrLF 4,5,6 4,5,6 4,5,6 4,5,6 All All All All 400 750 12 12 75 Notes to Specifications 1 2 3 4 5 6 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of VOUT at 50% load. 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 8) while power is applied to the input. 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. Above +125°C case, derate output power linearly to 0 at +135°C case. Input step transition time between 2 and 10 microseconds. 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 will interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn on. Load step transition time between 2 and 10 microseconds. Bandwidth guaranteed by design. Tested for 20KHz to 2MHz. Load current split equally between +VOUT and –VOUT. When operating with unbalanced loads, at least 25% of the load must be on the positive output to maintain regulation. Parameter guaranteed by line and load regulation tests. 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. Up to 90% of full power is available from either output provided the total output does not exceed 30 watts. 7 8 9 10 11 12 13 www.irf.com 5 ATW28XXD Series ATW28XXD Block Diagram 3 + V out EMI F ilter 1 + In put 8 E nable 2 S y nc In put R eturn 10 4 R eturn D rive 1 D rive 2 5 -V out P u lse W idth M odu lator FB E rror A m p & R eference Application Information Inhibit Function Connecting the inhibit input (Pin 8) to input common (Pin 10) will cause the converter to shut down. It is recommended that the inhibit pin be driven by an open collector device capable of sinking at least 400µA of current. The open circuit voltage of the inhibit input is 11.5 ±1 VDC. The user should be aware that the synchronization system is fail-safe; that is, the slaves will continue operating should the master frequency be interrupted for any reason. The layout must be such that the synchronization output (pin 2) of the master device is connected to the synchronization input (pin 2) of each slave device. It is advisable to keep this run short to minimize the possibility of radiating the 250KHz switching frequency. The appropriate parts must be ordered to utilize this feature. After selecting the converters required for the system, a ‘MSTR’ suffix is added for the master converter part number and a ‘SLV’ suffix is added for slave part number. See Part Number section. EMI Filter An optional external EMI filter (AFC461) is available that will reduce the input ripple current to levels below the limits imposed by MIL-STD-461B CEO3. Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to the slight differences in the switching frequencies of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10KHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communications, radar or telemetry). Advanced Analog offers an option, which allows synchronization of multiple AHE/ATW type converters, thus eliminating this type of noise. To take advantage of this capability, the system designer must assign one of the converters as the master. Then, by definition, the remaining converters become slaves and will operate at the masters’ switching frequency. Typical Synchronization Connection + In R e turn A F C 461 or A F V 46 1 O u tp ut + In C a se O u tp ut A T W 28xxS R e turn M STR R e turn R e turn S ystem B us + In A T W 28xxD O u tp ut or O ther R e turn R e turn C om patab le O u tp ut C a se S LV + In C a se R e turn S LV O u tp ut A T W 28xxD R e turn O u tp ut 6 www.irf.com ATW28XXD Series ATW28XXD Case Outlines 1.000 0.040 D X 0.26 L P ins 0.05 10 1 9 2 4 X 0.400 =1.600 2.360 2.70 0 M ax 8 3 1.95 7 4 6 Pin Designation Pin No. 1 2 Designation Positive Input N/C Standard or Sync. ( Optional ) Positive Output Output Return Negative Output N/C Case Ground Enable Inhibit 5 0.500 M ax 1.350 M ax Part Numbering A TW 28 15 D / CH - M STR M od e l In pu t V o ltag e 2 8 = 2 8 V N o m in a l S yn c O p tio n M S T R = M a s te r S L V = S la v e O m it fo r S ta n d a rd S cre e ning – O u tp ut V olta ge S in g le - 05 , 1 2 , 1 5 V D C D u a l - 1 2 = ±12 V , 1 5 = ±1 5 V , ES, HB, CH 3 4 5 6 7 8 9 10 O u tp uts S = S ing le D = Dual N/C Input Return www.irf.com 7 ATW28XXD Series Available Screening Levels and Process Variations for ATW28XXD 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 -55°C 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, Cond C 2001, Cond A 1015 MIL-PRF-38534 & Specification 1014 2009 48hrs @ 85°C 25°C ∗ Yes Cond A 500g 48hrs @ 105°C 25°C Yes ∗ Yes Yes Yes 5,000g 160hrs @ 125°C -55, +25, +125°C Yes Yes Yes Yes 5,000g 160hrs @ 125°C -55, +25, +125°C Yes Yes * Per Commercial Standards Available Standard Military Drawing (SMD) Cross Reference Standardized Military Drawing Pin 5962-9210901HZX 5962-9210902HZX 5962-9210903HZX 5962-9161301HZX 5962-9161302HZX 5962-9161303HZX Vendor CAGE Code Number 52467 52467 52467 52467 52467 52467 Vendor Similar Pin ATW2812D/CH ATW2812D/CH-SLV ATW2812D/CH-MSTR ATW2815D/CH ATW2815D/CH-SLV ATW2815D/CH-MSTR 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 8 www.irf.com