PD - 94556 ATW28XXS SERIES ADVANCED ANALOG HYBRID-HIGH RELIABILITY DC/DC CONVERTERS 28V Input, Single Output 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 28 VDC 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 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 does not incorporate the element evaluation and Periodic Inspection (PI) requirements of MIL-PRF-38534. 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 process are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Advanced Analog for special requirements. www.irf.com ATW Features n 19 to 40 VDC Input Range (28 VDC Nominal) n 30 Watts Output Power n Indefinite Short Circuit and Overload Protection 3 n 22.8 W/in Power Density n Fast Loop Response for Superior Transient Characteristics n Operating Temperature Range from -55C to +125C Available n Popular Industry Standard Pin-Out n Resistance Seam Welded Case for Superior Long Term Hermeticity n Efficiencies up to 83% n Shutdown from External Signal n Military Screening n 250,000 hour MTBF at 85C n MIL-PRF-38534 Compliant Versions Available 1 10/25/02 ATW28XXS Series Specifications ATW2805S ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C Table I. Electrical Performance Characteristics Test Symbol Output voltage Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified VOUT IOUT = 0 1 IOUT VRIP 1, 3 POUT VRLINE 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 Output current 2 Output ripple voltage Output power 4 Line regulation 4 VRLOAD Group A Subgroups Device Types 1 2,3 1,2,3 1,2,3 All All All 1,2,3 1 All All 2,3 1,2,3 mA mVp-p 5 W mV All 20 30 mV 1,2,3 All 18 mA 1,2,3 All 40 20 mAp-p 1 All 78 % 1 All 100 M 4 All 500 F 1 All 12 W 01 02 03 All Power dissipation load fault PD Switching frequency FS Short circuit, TC = +25C IOUT = 6000mA 4,5,6 VOTLOAD 4000mA to/from 6000mA 4,5,6 500mA to/from 2500mA 4,5,6 Input current IIN Input ripple current 2 IRIP Efficiency EFF Isolation ISO Capacitive load 5, 6 Output response to step 8 transient load changes CL Min 4.95 4.90 0 Unit Max 5.05 5.10 6000 50 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 = +25C Input to output or any pin to case (except pin 7) at 500 V dc Tc = +25C No effect on dc performance, Tc = +25C 7 Overload, TC = +25C Load regulation Limits 30 250 250 275 -500 9 300 270 300 +500 -500 +500 V KHz mVpk For Notes to Specifications, refer to page 3 2 www.irf.com ATW28XXS Series Table I. Electrical Performance Characteristics - continued Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified TTLOAD 4000mA to/from 6000mA ATW2805S Group A Subgroups Device Types 4 All Limits Min Recovery time step 8, 9 transient load changes 500mA to 2500mA Turn on overshoot 10 Turn on delay Load fault recovery VTonOS TonD 6, 10 TrLF IOUT = 0 and 6000mA IOUT = 0 and 6000mA 5,6 4 5,6 4,5,6 4,5,6 4,5,6 Unit Max 100 s All All 200 100 200 500 12 mV pk ms All 12 ms All Notes to Specifications 1 2 3 4 5 6 7 8 9 10 Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. Above +125C case, derate output power linearly to 0 at +135C. 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. 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. 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 ATW28XXS Series Specifications ATW2812S ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C Table II. Electrical Performance Characteristics Symbol Test Output voltage 1 Output current 2 Output ripple voltage VOUT IOUT = 0 IOUT VRIP 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 Line regulation VRLINE Load regulation VRLOAD Input current IIN Input ripple current 2 Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified IRIP Efficiency EFF Isolation ISO 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 Group A Subgroups mVp-p 1 All 30 mV 2,3 1,2,3 All 60 120 mV 1,2,3 All 18 mA 1,2,3 All 50 20 mAp-p 1 2,3 1 All All 4 All 200 F 1 All 12 W PD Switching frequency FS Short circuit IOUT = 2500mA 1,2,3 4,5,6 Output response to step transient load 6 changes VOTLOAD 1250mA to/from 2500mA 4,5,6 CL 0mA to/from 1250mA 01 02 03 All Min 11.88 11.76 Unit All All All Power dissipation load fault 3, 4 Limits Max 12.12 12.24 2500 50 1 2,3 1,2,3 1,2,3 Input to output or any pin to case (except pin 7) at 500 V dc Tc = +25C No effect on dc performance, Tc = +25C 5 Overload Capacitive load Device Types 78 75 100 V mA % M 250 250 275 -800 9 300 270 300 +800 -1000 +1000 KHz mVpk For Notes to Specifications, refer to page 5 4 www.irf.com ATW28XXS Series Table II. Electrical Performance Characteristics - continued Test Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified TTLOAD 1250mA to/from 2500mA ATW2812S Group A Subgroups Device Types 4 All Limits Min Recovery time step 6, 7 transient load changes 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 VOTLINE TTLINE VTonOS TonD 4, 9 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 5,6 4 5,6 4,5,6 Max 100 All All Unit -1000 s 200 5 10 +1000 mVpk ms 4,5,6 All 500 s 4,5,6 4,5,6 All All 600 12 mVpk ms 4,5,6 All 12 ms 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 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. 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 ground signal from the inhibit pin (pin 2) while power is applied to the input. www.irf.com 5 ATW28XXS Series Specifications ATW2815S ABSOLUTE MAXIMUM RATINGS Input Voltage Soldering Temperature Case Temperature -0.5V to 50V 300C for 10 seconds Operating -55C to +125C Storage -65C to +135C Table III. Electrical Performance Characteristics Symbol Test Output voltage Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 Unless otherwise specified VOUT IOUT = 0 1 IOUT VRIP Output power Line regulation 1, 3 POUT VRLINE 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 Load regulation VRLOAD Output current 2 Output ripple voltage Power dissipation load fault PD 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 = +25C Input to output or any pin to case (except pin 8) at 500 V dc Tc = +25C No effect on dc performance, Tc = +25C 6 Overload, TC = +25C Switching frequency FS Short circuit, TC = +25C IOUT = 1333mA Input current IIN Input ripple current 2 IRIP Efficiency EFF Isolation ISO Capacitive load 4, 5 Output response to step 7 transient load changes CL VOTLOAD 50% load to/from 100% load No load to/from 50% load Group A Subgroups Device Types 1 2,3 1,2,3 1,2,3 All 1,2,3 1 All All 2,3 1,2,3 Limits Max 15.15 15.30 1333 60 mA mVp-p 35 W mV All 75 150 mV 1,2,3 All 18 mA 1,2,3 All 35 50 mAp-p 1 All 80 % 1 All 100 M 4 All 200 F 1 All 6 W 4,5,6 01 02 03 All 4 5,6 4 5,6 All All Min 14.85 14.70 0 Unit 20 225 225 250 -300 6 275 245 275 +300 -450 -500 -750 +450 +500 +750 V KHz mVpk For Notes to Specifications, refer to page 7 6 www.irf.com ATW28XXS Series ATW2815S Table III. Electrical Performance Characteristics - continued Symbol Conditions -55C Tc +125C Vin = 28 Vdc 5%, CL = 0 unless otherwise specified Group A Subgroups Device Types TTLOAD 50% load to/from 100% load 4 All 70 s Output response to transient step line 5, 9 changes VOTLINE No load to 50% load 50% load to no load Input step 17 to 40 Vdc 5,6 4,5,6 4,5,6 4,5,6 All 100 1500 5 500 ms mVpk Recovery time transient line 5, 8, 9 changes TTLINE Input step 40 to 17 Vdc Input step 17 tp 40 Vdc 4,5,6 4,5,6 All 1500 800 ms VTonOS TonD Input step 40 to 17 Vdc IOUT = 0 and 1333mA IOUT = 0 and 1333mA 4,5,6 4,5,6 4,5,6 All All 800 600 10 mVpk ms 4,5,6 All 10 75 ms grams Test Limits Min Recovery time step transient load 7, 8 changes Turn on overshoot 10 Turn on delay Load fault recovery Weight 5 TrLF Flange Unit Max Notes to Specifications 1 2 3 4 Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20 kHz to 2 MHz. For operation at 16 Vdc input, derate output power by 33 percent. 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 and 10 microseconds. 8 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. 9 Input step transition time between 2 and 10 microseconds. 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. www.irf.com 7 ATW28XXS Series ATW28XXS Block Diagram 5 +V out 1 +Input EMI F ilte r 4 R eturn 2 E nab le D rive 1 P ulse W idth M odu lator F B 8 S yn c 6 +S ense E rro r Amp & R ef D rive 2 3 -S ense Input R eturn 10 Application Information Inhibit Function 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 400A of current. The open circuit voltage of the inhibit input is 11.5 1 VDC. 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 5.4 VDC. If the remote sense leads are shorted together, the output voltage may rise above 10 VDC depending on load, possibly damaging both the converter and load. 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. Typical Synchronization Connection 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). Advanced Analog offers an option, which provides synchronization of multiple AHE/ATW type converters, thus eliminating this type of noise. + In Return A F C 461 or A F V 461 O utput + In Cas e Return O utput A T W 28xxS Return Return M S TR S ystem B us + In A T W 28xxD or O ther Return C om patable Cas e O utput Return O utput S LV O utput + In Cas e A T W 28xxD Return O utput Return S LV 8 www.irf.com ATW28XXS Series ATW28XXS Case Outlines 1.000 0.05 10 8 3 7 2 4 6 1 9 0.040 D X 0.26 L P ins 5 4 X 0.400 =1.600 1.95 2.700 M ax 2.360 0.500 M ax 1.350 M ax Part Numbering Pin Designation ATW 28 05 S / CH - M STR Pin No. Designation S yn c O p tio n M odel * 1 Positive Input 2 Enable Input Inhibit Input 3 Neg. Remote Sense * 4 Output Common Return Output 5 Positive Output 6 Pos. Remote Sense * 7 Case Ground 8 N/C (or Sync. Option) 9 N/C 10 Input Return Input Common M S T R = M aste r S L V = S la ve O m it for S ta n d a rd In p u t V o lta g e 2 8 = 2 8V N o m in a l O u tp u t V o lta g e S in g le - 05 , 1 2 , 15 V D C D ua l - 1 2 = 1 2V , 1 5 = 1 5 V S cre e n in g - , ES, H B, C H O u tp u ts S = S in g le D = Dual ATW2805S only. ATW2812S, ATW2815S have N/C www.irf.com 9 ATW28XXS Series Available Screening Levels and Process Variations for ATW28XXS 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 toto+85C +85C -55C ES Suffix -55C to +125C 115C HB Suffix -55C to +125C CH Suffix -55C to +125C MIL-PRF-38534 2017 1010, Cond C Yes Cond A Yes Yes Yes Yes 500g 5,000g 5,000g 48hrs @ 105C 25C 160hrs @ 125C -55, +25, +125C 160hrs @ 125C -55, +25, +125C Yes Yes Yes Yes Yes Yes 2001, Cond A 1015 MIL-PRF-38534 & Specification 1014 48hrs @ 85C 25C 2009 * Per Commercial Standards Available Standard Military Drawing (SMD) Cross Reference Standardized Military Drawing PIN Vendor CAGE Code Vendor Similar PIN 5962-9157904HZX 5962-9157905HZX 5962-9157906HZX 52467 52467 52467 ATW2805S/CH ATW2805S/CH-SLV ATW2805S/CH-MSTR 5962-9211001HZX 5962-9211002HZX 5962-9211003HZX 52467 52467 52467 ATW2812S/CH ATW2812S/CH-SLV ATW2812S/CH-MSTR 5962-9159904HZX 5962-9159905HZX 5862-9159906HZX 52467 52467 52467 ATW2815S/CH ATW2815S/CH-SLV ATW2815S/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 10 www.irf.com