ATW28XXS

PD-94556A ATW28XXS SERIES 28V Input, Single Output HYBRID-HIGH RELIABILITY DC/DC CONVERTER Description The ATW28XXS 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 input and are available with single outputs at 5V,12V and 15V. 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. These devices are provided in a flanged package for secure mounting in severe environments. 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 19V to 40VDC Input Range (28VDC Nominal) 30W Output Power Indefinite Short Circuit and Overload Protection 3 22.8W/in Power Density 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 83% Shutdown from External Signal Military Screening 250,000 hour MTBF at 85°C Standard Microcircuit Drawings Available www.irf.com 1 12/14/06 ATW28XXS 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 ATW2805S 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 = 19, 28, and 40 V dc VIN = 19, 28, and 40 V dc, B.W. = dc to 2MHz VIN = 19,28, and 40 V dc VIN = 19, 28, and 40 V dc, Iout = 0, 3000, and 6000mA VIN = 19, 28, and 40 V dc, IOUT = 0, 3000, and 6000mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 6000mA B.W. = dc to 2MHz IOUT = 6000mA 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 7 Overload, TC = +25°C Short circuit, TC = +25°C IOUT = 6000mA 4000mA to/from 6000mA 500mA to/from 2500mA Group A Subgroups Device Types Limits Unit Output voltage Output current 2 Output ripple voltage Output power 4 Line regulation Load regulation Input current 2 1, 3 1 VOUT IOUT VRIP POUT VRLINE VRLOAD IIN IRIP EFF ISO 5, 6 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 All All All All All All All All All All All All Min 4.95 4.90 0 Max 5.05 5.10 6000 50 V mA mVp-p W mV mV mA mAp-p % MΩ 30 5.0 20 30 18 40 20 78 100 500 12 9.0 300 270 300 +500 +500 4 Input ripple current Efficiency Isolation Capacitive load CL PD FS VOTLOAD µF W Power dissipation load fault Switching frequency Output response to step 8 transient load changes 4,5,6 4,5,6 4,5,6 01 02 03 All 250 250 275 -500 -500 KHz mVpk For Notes to Specifications, refer to page 3 2 www.irf.com ATW28XXS Series Table I. Electrical Performance Characteristics - continued Test Symbol ATW2805S Device Types Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 unless otherwise specified 4000mA to/from 6000mA Group A Subgroups Limits Unit Min Recovery time step transient load changes 8, 9 Max 100 200 100 200 500 12 12 µs TTLOAD 4 5,6 4 5,6 4,5,6 4,5,6 4,5,6 All 500mA to 2500mA Turn on overshoot 10 Turn on delay Load fault recovery 6, 10 All All All All VTonOS TonD TrLF IOUT = 0 and 6000mA IOUT = 0 and 6000mA mV pk ms ms Notes to Specifications Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz. Above +125°C case, derate output power linearly to 0 at +135 °C. Output voltage measured at load with remote sense leads connected across load. 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. 6 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. 7 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. 8 Load step transition time between 2.0µ s and 10µs. 9 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. 10 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. 1 2 3 4 5 www.irf.com 3 ATW28XXS 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 ATW2812S Table II. Electrical Performance Characteristics Test Symbol Conditions -55°C ≤ Tc ≤+125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified Group A Subgroups Device Types Limits Unit Output voltage Output current 2 Output ripple voltage Line regulation Load regulation Input current 1 VOUT IOUT VRIP VRLINE VRLOAD IIN IOUT = 0 VIN = 18, 28, and 40 V dc 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 IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 2500mA B.W. = 20Hz to 2MHz IOUT = 2500mA 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 5 Overload Short circuit IOUT = 2500mA 1250mA to/from 2500mA 1 2,3 1,2,3 1,2,3 1 2,3 1,2,3 1,2,3 All All All All All All Min 11.88 11.76 Max 12.12 12.24 2500 50 ±30 ±60 ±120 18 50 V mA mVp-p mV mV mA Input ripple current Efficiency Isolation Capacitive load 3, 4 2 IRIP EFF ISO CL PD FS VOTLOAD 1,2,3 1 2,3 1 4 1 1,2,3 4,5,6 4,5,6 All All All All All 01 02 03 All 250 250 275 -800 78 75 100 20 mAp-p % MΩ 200 12 9.0 300 270 300 +800 µF W KHz mVpk Power dissipation load fault Switching frequency Output response to step transient load 6 changes 0mA to/from 1250mA -1000 +1000 For Notes to Specifications, refer to page 5 4 www.irf.com ATW28XXS Series Table II. 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 ATW2812S Limits Unit Min Recovery time step 6, 7 transient load changes TTLOAD 1250mA to/from 2500mA 4 5,6 4 5,6 4,5,6 All Max 100 200 5.0 10 +1000 µs 0mA to 1250mA Output response to Transient step Line changes Recovery time Transient step Line changes Turn on overshoot Turn on delay Load fault recovery 4, 9 All All -1000 ms mVpk µs VOTLINE TTLINE VTonOS TonD TrLF Input step 18V to/ from 40V dc, 4, 8 IOUT = 2500mA Input step 18V to/ from 40V dc 4, 7, 8 IOUT = 2500mA IOUT = 0 and 2500mA 9 IOUT = 0 and 2500mA 4,5,6 All 500 4,5,6 4,5,6 4,5,6 All All All 600 12 12 mVpk ms ms Notes to Specifications 1 2 3 4 5 6 7 8 9 Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz. 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 II. 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 2.0µ s and 10 µs. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of VOUT at 50% load. Input step transition time between 2.0µs and 10 µs. 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 2) while power is applied to the input. www.irf.com 5 ATW28XXS 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 ATW2815S Table III. Electrical Performance Characteristics Test Symbol Conditions -55°C ≤ Tc ≤ +125°C Vin = 28 Vdc ±5%, CL = 0 Unless otherwise specified Group A Subgroups Device Types Limits Unit Output voltage Output current 2 Output ripple voltage Output power Line regulation 1, 3 1 V OUT IOUT VRIP P OUT VRLINE VRLOAD IIN IOUT = 0 VIN = 17, 28, and 40 V dc VIN = 17, 28, and 40 V dc, B.W. = dc to 2MHz VIN = 17,28, and 40 V dc VIN = 17, 28, and 40 V dc, Iout = 0, 677, and 1333mA VIN = 17, 28, and 40 V dc, IOUT = 0, 677, and 1333mA IOUT = 0, inhibit (pin 2) tied to input return (pin 10) IOUT = 0, inhibit (pin 2) = open IOUT = 1333mA B.W. = dc to 2MHz IOUT = 1333mA TC = +25°C Input to output or any pin to case (except pin 8) at 500 V dc Tc = +25°C No effect on dc performance, Tc = +25°C 6 Overload, TC = +25°C Short circuit, TC = +25° C IOUT = 1333mA 50% load to/from 100% load No load to/from 50% load 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 14.85 14.70 0 Max 15.15 15.30 1333 60 V mA mVp-p W mV mV mA 20 35 75 150 18 35 Load regulation Input current Input ripple current E fficiency Isolation 2 IRIP E FF ISO 1,2,3 1 1 All All All 80 100 50 mAp-p % MΩ Capacitive load 4, 5 CL PD FS VOTLOAD 4 1 All All 200 6.0 6.0 275 245 275 +300 +450 +500 +750 µF W P ower dissipation load fault S witching frequency 4,5,6 Output response to step 7 transient load changes 4 5,6 4 5,6 01 02 03 All 225 225 250 -300 -450 -500 -750 KHz mVpk For Notes to Specifications, refer to page 7 6 www.irf.com ATW28XXS Series 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 ATW2815S Limits Unit Min Recovery time step transient load 7, 8 changes TTLOAD 50% load to/from 100% load 4 All Max 70 µs Output response to transient step line 5, 9 changes Recovery time transient line 5, 8, 9 changes Turn on overshoot 10 Turn on delay Load fault recovery Weight 5 VOTLINE No load to 50% load 50% load to no load Input step 17 to 40 Vdc Input step 40 to 17 Vdc Input step 17 tp 40 Vdc Input step 40 to 17 Vdc IOUT = 0 and 1333mA IOUT = 0 and 1333mA 5,6 4,5,6 4,5,6 4,5,6 4,5,6 4,5,6 4,5,6 4,5,6 4,5,6 4,5,6 All 100 1500 5.0 500 1500 800 800 600 10 10 75 ms mVpk TTLINE All ms VTonOS TonD TrLF All All All mVpk ms ms g Flange Notes to Specifications Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20kHz to 2.0MHz. For operation at 16 Vdc input, derate output power by 33%. 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. 5 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. 6 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. 7 Load step transition time between 2.0µs and 10 µs. 8 Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1.0% of V OUT at 50% load. 9 Input step transition time between 2.0 µs and 10µ s. 10 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 2) while power is applied to the input. 1 2 3 4 www.irf.com 7 ATW28XXS Series Block Diagram +Input 1 Enable Input 2 Sync 8 Input Return 10 Drive 1 5 +Vout EMI Filter Output 4 Return Pulse Width Modulator FB Drive 2 Error Amp & Ref 6 +Sense 3 -Sense Application Information Inhibit Function (Enable) Connecting the inhibit input (Pin 2) 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. 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 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 8) of the master device is connected to the synchronization input (pin 8) 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 EMI filter (AFC461) will reduce the input ripple current to levels below the limits imposed by MIL-STD-461 CEO3. Remote Sense (ATW2805S only) Better than 0.1% line and load regulation (case temperature constant) are typical when the remote sense leads are used. If the remote sense leads are left unconnected, then the output voltage (measured at pins 4 and 5) will rise to approximately 5.4VDC. If the remote sense leads are shorted together, the output voltage may rise above 10VDC depending on load, possibly damaging both the converter and load. Typical Synchronization Connection + In Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to the sight 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 Rectifier offers an option, which provides synchronization of multiple AHE/ATW type converters, thus eliminating this type of noise. Return AFC461 or AFV461 Output + In Case Output ATW28xxS Return MSTR Return Return System Bus ATW28xxD Output or Other Return Return Compatable Output + In Case SLV + In Case Return SLV Output ATW28xxD Return Output 8 www.irf.com ATW28XXS 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 8 4 7 5 6 0.500 Max 1.350 Max Pin Designation Pin # 1 2 3 4 5 6 7 8 9 10 Designation + Input Enable Input - Remote Sense * Output Return + Output + Remote Sense * Case Ground NC ( or Sync. Option) NC Input Return * ATW2805S only. ATW2812S, ATW2815S have NC Standard Microcircuit Drawing Equivalence Table Standard Microcircuit Drawing Number 5962-91579 5962-92110 5962-91599 Vendor Cage Code 52467 52467 52467 IR Standard Part Number ATW2805S ATW2812S ATW2815S www.irf.com 9 ATW28XXS 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 S /CH - MSTR Model Input Voltage Nominal 28 = 28V Sync Option MSTR = Master SLV = Slave Omit for Standard (Please refer to Screening Table) Screening Level Output S = Single Output Voltage 05 = 5V 12 = 12V 15 = 15V 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 10 www.irf.com