ATW28XXD_06

PD-94557A ATW28XXD SERIES 28V Input, Dual Output 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 28VDC 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. Manufactured in a facility fully qualified to MIL-PRF38534, these converters are fabricated utilizing DSCC 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 Santa Clara for special requirements. ATW Features n n n n n n n n n n n n n n 18V to 40VDC Input Range (28VDC Nominal) ±12V and ±15V Outputs Available Indefinite Short Circuit and Overload Protection 3 22.8W/in Power Density 30W Output Power Fast Loop Response for Superior Transient Characteristics Operating Temperature Range from -55°C to +125°C Available Popular Industry Standard Pin-Out Resistance Seam Welded Case for Superior Long Term Hermeticity Efficiencies up to 85% Shutdown from External Signal Full Military Screening 200,000 hour MTBF at 85°C Standard Microcircuit Drawings Available www.irf.com 1 12/14/06 ATW28XXD Series Specifications Absolute Maximum Ratings Input voltage Soldering temperature Operating case temperature Storage case temperature -0.5V to +50VDC 300°C for 10 seconds -55°C to +125°C -65°C to +135°C ATW2812D 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 3 VOUT IOUT VRIP VRLINE VRLOAD VRCROSS IIN 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 All All All Min ±11.88 ±11.76 250 Max ±12.12 ±12.24 2250 85 30 60 120 3.5 18 50 V mA mVp-p mV mV % mA Output ripple voltage Line regulation 4 Load regulation 4 5 Cross regulation Input current Input ripple current Efficiency Isolation Capacitive load 6, 7 4 3, 4 IRIP EFF ISO CL PD 1,2,3 1 1 4 1 4,5,6 All All All All All 01 02 03 All 250 250 275 -400 80 100 50 mAp-p % MΩ 200 12 9.0 300 270 300 +400 µF W KHz Power dissipation load fault Switching frequency 4 FS 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 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 5.0 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 Output response transient step line 4, 7, 11 changes Recovery time transient step line 4, 7, 10, 11 change 4 Turn on overshoot 4, 12 Turn on delay Load fault recovery Weight 7 VOTLINE TTLINE VTonOS TonD TrLF 4,5,6 All Min -800 Max +800 mV pk 4,5,6 All 4000 µs mV pk ms ms g 4,5,6 4,5,6 4,5,6 All All All 750 14 14 75 Flange Notes to Specifications 1 2 3 4 5 6 7 8 9 10 11 12 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 –V OUT. Three-watt load on output under test, 3.0W to 27W 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 2.0 µs and 10 µs. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of V OUT at 50%load. Input step transition time between 2.0 µs and 10µs. 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. www.irf.com 3 ATW28XXD Series Specifications Absolute Maximum Ratings Input voltage Soldering temperature Operating case temperature Storage case temperature -0.5V to +50VDC 300°C for 10 seconds -55°C to +125°C -65°C to +135°C ATW2815D 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 50% load to/from 100% load Group A Subgroups Device Types Limits Unit Output voltage Output current Output ripple voltage Output Power Line regulation 4, 11 9, 10 11, 13 VOUT 8 IOUT VRIP POUT VRLINE VRLOAD IIN IRIP EFF ISO CL PD FS VOTLOAD 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 4 1 1 1,2,3 1,2,3 1,2,3 4,5,6 All All All All All All All All All All All All All All All All 01 02 03 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 80 100 500 9.0 9.0 263 245 265 +300 Load regulation Input current 9, 10 Input ripple current Efficiency Isolation Capacitive load 6, 12 Power dissipation load fault Switching frequency Output response to step transient 7, 9, 10 load changes 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 7.0 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 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 ATW2815D Limits Unit 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 g 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 7 8 9 10 11 12 13 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ± 1.0% 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 2.0 µs and 10µ s. 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 2.0µ s and 10 µs. 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 30W. www.irf.com 5 ATW28XXD Series Block Diagram 3 +Vout +Input 1 Enable 8 Sync 2 Input Return 10 EMI Filter Drive 1 Drive 2 4 Output Return 5 -Vout Pulse Width Modulator FB Error Amp & Reference Application Information Inhibit Function (Enable) 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 ±1.0VDC. 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. 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). International Rectifie roffers 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. 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. Typical Synchronization Connection + In Return AFC461 or AFV461 Output + In Case Output ATW28xxS Return MSTR Return Return System Bus + In ATW28xxD Output or Other Return Return Compatable Output Case SLV + In Case Return SLV Output ATW28xxD Return Output 6 www.irf.com ATW28XXD Series Mechanical Outline 1.000 0.040 D X 0.26 L Pins 0.05 10 1 2 9 4 X 0.400 =1.600 1.95 2.360 2.700 Max 3 7 8 4 6 5 0.500 Max 1.350 Max Notes: 1) All dimensions are in inches 2) The tolerance for X.XXX = ±0.005 Pin Designation Pin # 1 2 3 4 5 6 7 8 9 10 Designation + Input NC Standard or Sync. ( Optional ) + Output Output Return - Output NC Case Ground Enable NC Input Return Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number 5962-92109 5962-91613 Vendor Cage Code 52467 52467 IR Standard Part Number ATW2812D ATW2815D www.irf.com 7 ATW28XXD Series Device Screening Requirement Temperature Range Element Evaluation Non-Destructive Bond Pull Internal Visual Temperature Cycle Constant Acceleration PIND Burn-In Final Electrical ( Group A ) PDA Seal, Fine and Gross Radiographic External Visual MIL-PRF-38534 2023 2017 1010 2001, Y1 Axis 2020 1015 MIL-PRF-38534 & Specification MIL-PRF-38534 1014 2012 2009 N/A Cond A N/A N/A Cond A, C N/A Yes MIL-STD-883 Method No Suffix N/A N/A ES d HB CH -55°C to +125°C Class H N/A Yes Cond C 3000 Gs N/A -55°C, +25°C, +125°C 10% Cond A, C N/A Yes -20°C to +85°C -55°C to +125°C N/A N/A Yes Cond B 500 Gs N/A e -55°C to +125°C N/A N/A Yes Cond C 3000 Gs N/A -55°C, +25°C, +125°C N/A Cond A, C N/A Yes c N/A N/A N/A N/A 25°C 48 hrs@hi temp 25°C d 160 hrs@125°C 160 hrs@125°C c Notes:  Best commercial practice ‚ Sample tests at low and high temperatures ƒ -55°C to +105°C for AHE, ATO, ATW Part Numbering ATW 28 15 D /CH - MSTR Model Input Voltage Nominal 28 = 28V Sync Option MSTR = Master SLV = Slave Omit for Standard Output Voltage 12 = ±12V 15 = ±15V (Please refer to Screening Table) Screening Level Output D = Dual No Suffix, ES, HB, CH WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR SANTA CLARA: 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. 12/2006 8 www.irf.com