LAMBDA ADVANCED ANALOG INC. λ ATW2800S Series Single Output, Hybrid - High Reliability DC/DC Converter DESCRIPTION FEATURES The ATW2800S 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 have nominal 28VDC inputs with +5, +12V and +15V single outputs. 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. n 19 To 40 Volt Input Range (28VDC Nominal) n 30 Watts Output Power n Indefinite Short Circuit and Overload Protection n 22.8 W/in3 Power Density n Fast Loop Response For Superior Transient Characteristics n Operating Temperature Range From -55°C to +125°C Available 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 feedback circuits. n Popular Industry Standard Pin-Out n Resistance Seam Welded Case For Superior Long Term Hermeticity n Efficiencies Up to 83% Three standard temperature grades are offered. Refer to Part Number section. They are provided in a flanged package for more severe enviroments. n Shutdown From External Signal n Military Screening n 250,000 Hour MTBF at 85°C n MIL-PRF-38534 Compliant Versions Available 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 MIL-PRF-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 (P.I.) 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 more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be accommodated. Contact Lambda Advanced Analog for special requirements. SPECIFICATIONS ATW2805S 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 V dc ±5%, CL = 0 unless otherwise specified Group A subgroups Device types Limits Min Output voltage VOUT IOUT = 0 1 All 2,3 Output current 1/ IOUT VIN = 19, 28, and 40 V dc 1,2,3 All Output ripple voltage 2/ VRIP VIN = 19, 28, and 40 V dc B.W. = dc to 2 MHz 1,2,3 All Output power 1/ 3/ POUT VIN = 19, 28, and 40 V dc 1,2,3 All Line regulation 4/ VRLINE VIN = 19, 28, and 40 V dc IOUT = 0, 3000, and 6000 mA 1 All Unit Max 4.95 5.05 4.90 5.10 0.0 6000 50 30 mA mV p-p W 5 2,3 V mV 20 Load regulation 4/ VRLOAD VIN = 19, 28, and 40 V dc IOUT = 0, 3000, and 6000 mA 1,2,3 All 30 mV Input current IIN IOUT = 0, inhibit (pin 2) tied to input return (pin 10) 1,2,3 All 18 mA IOUT = 0, inhibit (pin 2) = open Input ripple current 2/ IRIP IOUT = 6000 mA B.W. = dc to 2 MHz Efficiency EFF Isolation 40 1,2,3 All 20 IOUT = 6000 mA, TC = +25°C 1 All 78 ISO Input to output or any pin to case (except pin 7) at 500 V dc, TC = +25°C 1 All 100 Capacitive load 5/ 6/ CL No effect on dc performance, TC = +25°C 4 All 500 µF Power dissipation load fault PD Overload, TC = +25°C 7/ 1 All 12 W % MΩ 9 Short circuit, TC = +25°C See footnotes at end of table. 2 mA p-p ATW2805S TABLE I. Electrical Performance Characteristics - Continued. Test Symbol Conditions -55°C ≤ TC ≤ +125°C VIN = 28 V dc ±5%, CL = 0 unless otherwise specified Group A Subgroups Device Type Limits Min Switching frequency Output response to step transient load changes 8/ Recovery time step transient load changes 8/ 9/ FS VOTLOAD TTLOAD IOUT = 6000 mA 4,5,6 Unit Max 01 250 300 02 250 270 03 275 300 4000 mA to/from 6000 mA 4,5,6 All -500 +500 500 mA to/from 2500 mA 4,5,6 All -500 +500 4000 mA to/from 6000 mA 4 All 5,6 500 mA to/from 2500 mA 4 100 kHz mV pk µs 200 All 5,6 100 200 Turn on overshoot VTonOS IOUT = 0 and 6000 mA 4,5,6 All 500 mV pk Turn on delay 10/ TonD IOUT = 0 and 6000 mA 4,5,6 All 12 ms Load fault recovery 6/ 10/ TrLF 4,5,6 All 12 ms Notes: 1/ 2/ 3/ 4/ 5/ Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20 KHz to 2 MHz. 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 and 10 microseconds. 9/ 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. 10/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. 3 SPECIFICATIONS ATW2812S 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 V dc ±5%, CL = 0 unless otherwise specified Group A subgroups Device types Limits Min Output voltage VOUT IOUT = 0 1 All 2,3 Output current 1/ IOUT VIN = 19, 28, and 40 V dc 1,2,3 All Output ripple voltage 2/ VRIP VIN = 19, 28, and 40 V dc B.W. = dc to 2 MHz 1,2,3 All Output power 1/ 3/ POUT VIN = 19, 28, and 40 V dc 1,2,3 All Line regulation 4/ VRLINE VIN = 19, 28, and 40 V dc IOUT = 0, 3000, and 6000 mA 1 All Unit Max 4.95 5.05 4.90 5.10 0.0 6000 50 30 mA mV p-p W 5 2,3 V mV 20 Load regulation 4/ VRLOAD VIN = 19, 28, and 40 V dc IOUT = 0, 3000, and 6000 mA 1,2,3 All 30 mV Input current IIN IOUT = 0, inhibit (pin 2) tied to input return (pin 10) 1,2,3 All 18 mA IOUT = 0, inhibit (pin 2) = open Input ripple current 2/ IRIP IOUT = 6000 mA B.W. = dc to 2 MHz Efficiency EFF Isolation 40 1,2,3 All 20 IOUT = 6000 mA, TC = +25°C 1 All 78 ISO Input to output or any pin to case (except pin 7) at 500 V dc, TC = +25°C 1 All 100 Capacitive load 5/ 6/ CL No effect on dc performance, TC = +25°C 4 All 500 µF Power dissipation load fault PD Overload, TC = +25°C 7/ 1 All 12 W % MΩ 9 Short circuit, TC = +25°C See footnotes at end of table. 4 mA p-p ATW2812S TABLE II. Electrical Performance Characteristics - Continued. Test Symbol Conditions -55°C ≤ TC ≤ +125°C VIN = 28 V dc ±5%, CL = 0 unless otherwise specified Group A Subgroups Device Type Limits Min Switching frequency Output response to step transient load changes 8/ Recovery time step transient load changes 8/ 9/ FS VOTLOAD TTLOAD IOUT = 6000 mA 4,5,6 Unit Max 01 250 300 02 250 270 03 275 300 4000 mA to/from 6000 mA 4,5,6 All -500 +500 500 mA to/from 2500 mA 4,5,6 All -500 +500 4000 mA to/from 6000 mA 4 All 5,6 500 mA to/from 2500 mA 4 100 kHz mV pk µs 200 All 5,6 100 200 Turn on overshoot VTonOS IOUT = 0 and 6000 mA 4,5,6 All 500 Turn on delay 10/ TonD IOUT = 0 and 6000 mA 4,5,6 All 12 ms Load fault recovery 6/ 10/ TrLF 4,5,6 All 12 ms 75 grams Weight Flange mV pk Notes: 1/ 2/ 3/ 4/ 5/ Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 20 KHz to 2 MHz. 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 II. 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 and 10 microseconds. 9/ 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. 10/ 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. 5 SPECIFICATIONS ATW2815S 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 V dc ±5%, CL = 0 unless otherwise specified Group A subgroups Device types Limits Min Output voltage VOUT IOUT = 0 1 All 2,3 Output current 1/ IOUT VIN = 17, 28, and 40 V dc 1,2,3 All Output ripple voltage 2/ VRIP VIN = 17, 28, and 40 V dc B.W. = dc to 2 MHz 1,2,3 All Output power 1/ 3/ POUT VIN = 17, 28, and 40 V dc 1,2,3 All Line regulation VRLINE VIN = 17, 28, and 40 V dc IOUT = 0, .677, and 1333 mA 1 All Unit Max 14.85 15.15 14.70 15.30 0.0 1333 60 20 mA mV p-p W 35 2,3 V mV 75 Load regulation VRLOAD VIN = 17, 28, and 40 V dc IOUT = 0, .677, and 1333 mA 1,2,3 All 150 mV Input current IIN IOUT = 0, inhibit (pin 2) tied to input return (pin 10) 1,2,3 All 18 mA IOUT = 0, inhibit (pin 2) = open Input ripple current 2/ IRIP IOUT = 1333 mA B.W. = dc to 2 MHz Efficiency EFF Isolation 35 1,2,3 All 50 IOUT = 1333 mA, TC = +25°C 1 All 80 ISO Input to output or any pin to case (except pin 8) at 500 V dc, TC = +25°C 1 All 100 Capacitive load 4/ 5/ CL No effect on dc performance, TC = +25°C 4 All 200 µF Power dissipation load fault PD Overload, TC = +25°C 6/ 1 All 6 W % MΩ 6 Short circuit, TC = +25°C See footnotes at end of table. 6 mA p-p ATW2815S TABLE III. Electrical Performance Characteristics - Continued. Test Symbol Conditions -55°C ≤ TC ≤ +125°C VIN = 28 V dc ±5%, CL = 0 unless otherwise specified Group A subgroups Device types Limits Min Switching frequency FS Output response to step transient load changes 7/ VOTLOAD IOUT = 1333 mA 4,5,6 50 percent load to/from 100 percent load 4 4 225 275 02 225 245 03 250 275 All -300 +300 -450 +450 -500 +500 -750 +750 All 5,6 Recovery time step transient load changes 7/ 8/ TTLOAD 50 percent load to/from 100 percent load 4 All 5,6 Output response to transient step line changes 5/ 9/ Recovery time transient line changes 5/ 8/ 9/ VOTLINE TTLINE Max 01 5,6 No load to/from 50 percent load Unit 70 kHz mV pk µs 100 No load to 50 percent load 4,5,6 All 1500 50 percent load to no load 4,5,6 All 5 Input step 17 to 40 V dc 4,5,6 All 500 Input step 40 to 17 V dc 4,5,6 All -1500 Input step 17 to 40 V dc 4,5,6 All 800 Input step 40 to 17 V dc 4,5,6 All 800 ms mV pk ms Turn on overshoot VTonOS IOUT = 0 and 1333 mA 4,5,6 All 600 Turn on delay 10/ TonD IOUT = 0 and 1333 mA 4,5,6 All 10 ms 4,5,6 All 10 ms 75 grams Load fault recovery Weight 5/ TrLF Flange mV pk Notes: 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 V dc 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 a ground signal from the inhibit pin (pin 2) while power is applied to the input. 7 BLOCK DIAGRAM INPUT FILTER 1 OUTPUT FILTER 5 2 CONTROLLER 6 8 ERROR AMP & REF 10 4 Available Screening Levels and Process Variations for ATW 2800S Series Requirement MIL-STD-883 method Temperature Range Element Evaluation Internal Visual Temperature Cycle Constant Acceleration Burn-in Final Electrical (Group A) Seal, Fine & Gross External Visual ◆ per Commercial Standards No Suffix ES Suffix -55°C to +85°C -55°C to +115°C 2017 1010, Cond C 2001, Cond A 1015 Specification 1014 2009 ◆ ✔ Cond A 500g 96hrs @105°C 25°C ✔ ✔ 25°C ◆ HB Suffix -55°C to +125°C ✔ ✔ 5,000g 160hrs @125°C -55, +25, +125°C ✔ ✔ PART NUMBER ATW 28xx S / x - xxx Model Input Voltage Synchronization Option Omit for standard MSTR — Master SLV — Slave Output Voltage Single Output 3 Temperature Range Omit for -55°C to +85°C (Industrial) ES — -55°C to +105°C (Environmental) HB — -55°C to +125°C (Military Screening) CH — -55½C to +125°C (DESC Compliant) 8 CH Suffix -55°C to +125°C MIL-PRF-38534 ✔ ✔ 5,000g 160hrs @125°C -55,+25, +125°C ✔ ✔ TYPICAL CHARACTERISTICS Waveforms shown are for ATW2805 2 mV/div 2 mA/div 2 µs/div Figure 1 Output Ripple Voltage VIN = 28 VDC, Full Load 2 µs/div Figure 2 Input Ripple Voltage VIN = 28 VDC, Full Load 1 mV/div 1 mV/div 2 ms/div Figure 3 Turn-on Response @Full Load 100 µs/div Figure 4 Turn-on Response, @Full Load 5.5 V 5.5 V 100 mV/div 100 mV/div 4.5 V 4.5 V 100 µs/div Figure 5 Load Step Response Load Step 0 to 6.0 ADC (No Load to Full Load) 9 2 ms/div Figure 6 Load Step Response Load Step 3.0 to 0 ADC (Full Load to No Load) TYPICAL CHARACTERISTICS (Continued) 5.5 V 6.5 V 100 mV/div 100 mV/div 4.5 V 4.5 V 50 µs/div Figure 7 Load Step Response Load Step 3.0 ADC to 6.0 ADC (Half Load to Full Load) 100 µs/div Figure 9 Line Step Response A: Output @ 100 mV V/div, Full Load B: Input step @ 19 VDC to 40 VDC 50 µs/div Figure 8 Load Step Response Load Step 6.0 ADC to 3.0 ADC (Full Load to Half Load) 100 µs/div Figure 10 Line Step Response A: Output @ 100 mV/div, Full Load B: Input Step 40 VDC to 19 VDC 10 TYPICAL CHARACTERISTICS (Continued) Figure 12 Audio Rejection with AFC461 EMI Filter MECHANICAL OUTLINE 2.700 max (68.580) 0.090R max 1.350 max (34.290) 1.00 ± 0.005 (25.400 ± 0.127) 10 1 Pin #1 Bottom View 2.360 ± 0.005 (59.944 ± 0.127) 0.162D ± 0.005 2 places (4.115 ± 0.127) 1.950 max (49.530) 0.050 max (1.270) 6 0.500 max (12.700) 4 x 0.400 ± 0.005 = 1.600 ± 0.010 (10.160 ± 0.127) (40.640 ± 0.254) 0.040D ± 0.002 x 0.260L ± 0.010 (1.016 ± 0.050) (6.604 ± 0.254) PIN DESIGNATION Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Positive input Inhibit input Neg. remote sense* Output common Positive output Pin 10 Pin 9 Pin 8 Pin 7 Pin 6 Input common N/C N/C** Case ground Pos. remote sense* *ATW2805S only. ATW2812S, ATW2815S have N/C. **Or synchronization option. 11 5 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 400 µA of current. The open circuit voltage of the inhibit input is 11.5 ±1 VDC. 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 failsafe; 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 250 KHz 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 approximately 5.4 VDC. If the remote sense leads are shorted together, the output voltage may rise above 10 VDC depending on load, posibly damaging both the converter and load. Device Synchronization Whenever multiple DC/DC converters are utilized in a single system, significant low frequency noise may be generated due to slight differences in the switching frequencies of the converters (beat frequency noise). Because of the low frequency nature of this noise (typically less than 10 KHz), it is difficult to filter out and may interfere with proper operation of sensitive systems (communications, radar or telemetry). Lambda Advanced Analog offers an option which provides synchronization of multiple AHE/ATW type converters, thus eliminating this type of noise. 1 FILTER 4 3 1 10 ATW2815D/ES-SLV SLAVE SYSTEM BUS 1 10 52467 52467 52467 ATW2805S/CH ATW2805S/CH-SLV ATW2805S/CH-MSTR 5962-921101HZX 5962-921102HZX 5962-921103HZX 52467 52467 52467 ATW2812S/CH ATW2812S/CH-SLV ATW2812S/CH-MSTR 5962-9159904HZX 5962-9159905HZX 5962-9159906HZX 52467 52467 52467 ATW2815S/CH ATW2815S/CH-SLV ATW2815S/CH-MSTR 4 5 5 ATW2812S/ES-SLV SLAVE +15V COMM -15V 4 +12V COMM 8 Typical Synchronization Connection Diagram ATW2805S EFFICIENCY Vendor similar PIN 5962-9157904HZX 5962-9157905HZX 5962-9157906HZX +5V COMM 2 Efficiency (%) Vendor CAGE number 5 ATW2805S/ES-MSTR 8 STANDARDIZED MILITARY DRAWING CROSS REFERENCE Standardized military drawing PIN 10 Output Power (Watts) 12 NOTES Lambda Advanced Analog The information in this data sheet has been carefully checked and is believed to be accurate; however no responsibility is assumed for possible errors. These specifications are subject to change without notice. LAMBDA ADVANCED ANALOG INC. λ MIL-PRF-38534 Certified ISO9001 Registered 9848 2270 Martin Avenue Santa Clara CA 95050-2781 (408) 988-4930 FAX (408) 988-2702