ATS

ATS IRF | Alldatasheet

Document overview

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Technical content

Features

28V Input, Single/Dual Output Manufactured in a facility fully qualified to MIL-PRF- 38534, these converters are fabricated utilizing DSCC qualified processes. For available screening options, refer to device screening table in the data sheet.

Applications

The ATS Series DC/DC converters are a family of 25W, single and dual output, high reliability devices designed for rugged environments and extended temperature operations such as those encountered in military, aerospace and industrial applications. The converters are in full compliant with CE03 and CS01 of MIL-STD- 461C. Features include small size, low weight and conservative component stress de-rating. For operations in radiation environments, the M3L series with the identical form factor and electrical rating is recommended. All models include an external inhibit port and have an adjustable output voltage. They are enclosed in a hermetic 1.5" x 2.3" x .425" steel package and weight less than 85grams. The package utilizes rugged ceramic feed-thru copper core pins and is sealed using parallel seam welding. ATS /G110 Military Aircraft /G110 Commercial Aircraft /G110 Missiles /G110 Ground Equipment PD-97221A

2 www.irf.com ATS-SERIES The ATS Series converters utilize a single-ended forward topology with resonant reset. The nominal switching frequency is 500KHz. Electrical isolation and tight output regulation are achieved through the use of a magnetically coupled feedback. Voltage feed-forward with duty factor limiting provides high line rejection and protection against output over voltage in the event of an internal control loop failure. This mechanism limits the maximum output voltage to approximately 20% over the nominal regardless of the line voltage. Circuit Description An internal EMI filter allows the converter to meet the conducted emissions requirements of MIL-STD- 461C on the input power leads. A single-stage output filter reduces the typical output ripple to less than 50mV peak-to-peak. Output current is limited under any load fault condition to approximately 125% of rated. An overload condition causes the converter output to behave like a constant current source with the output voltage dropping below nominal. The converter will resume normal operation when the load current is reduced below the current limit point. This protects the converter from both overload and short circuit conditions. The current limit point exhibits a slightly negative temperature coefficient to reduce the possibility of thermal runaway. An external inhibit port is provided to control converter operation. The converter’s operation is inhibited when this pin is pulled low. It is designed to be driven by an open collector logic device. The pin may be left open for normal operation and has a nominal open circuit voltage of 10.5V with respect to the input return (pin 2). The output voltage of all models can be adjusted using a single external resistor.

www.irf.com 3 ATS-SERIES Meets derating per MIL-STD-975 For operation at +125°C see table note 13 Electrical Performance Characteristics For Notes to Electrical Performance Characteristics Table, refer to page 5 Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Input Voltage 16 28 50 V Output Voltage ( Vout ) ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D 2,3 2,3 2,3 2,3 2,3 2,3 2,3 I OUT = 100% rated load Note 4 I OUT = 100% rated load Note 4 3.27 4.95 11.88 14.85 ±4.95 ±11.88 ±14.85 3.23 4.90 11.76 14.70 ±4.90 ±11.76 ±14.70 3.30 5.00 12.00 15.00 ±5.00 ±12.00 ±15.00 3.33 5.05 12.12 15.15 ±5.05 ±12.12 ±15.15 3.37 5.10 12.24 15.30 ±5.10 ±12.24 ±15.30 V V Output power ( POUT ) ATS2803R3S All Others 1,2,3 VIN = 16, 28, 50 Volts, Note 2 W Output current ( IOUT ) ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D 1,2,3 V IN = 16, 28, 50 Volts, Note 2 Either Output, Note 3 Either Output, Note 3 Either Output, Note 3 6.06 5.00 2.08 1.67 4.00 1.67 1.33 A Line regulation ( VRLINE ) 1,2,3 V IN = 16, 28, 50 Volts IOUT = 0, 50%, 100% rated, Note 4 -0.5 0.5 % Load regulation ( VRLOAD ) 1,2,3 I OUT = 0, 50%, 100% rated, Note 4 VIN = 16, 28, 50 Volts -1.0 1.0 % Cross regulation ( VRCROSS ) ATS2805D ATS2812D ATS2815D 1,2,3 V IN = 16, 28, 50 Volts Duals only, Note 5 -5.0 -3.0 -3.0 5.0 3.0 3.0 Input voltage range -0.5Vdc to +75Vdc Input voltage range +16Vdc to +50Vdc Output power Internally limited Input voltage range1 +16Vdc to +38Vdc Lead temperature +300°C for 10 seconds Output power 0 to Max. Rated Operating case temperature -55°C to +125°C Operating temperature2 -55°C to +125°C Storage temperature -55°C to +135°C Operating temperature1 -55°C to +70°C Recommended Operating Conditions Absolute Maximum Ratings

4 www.irf.com ATS-SERIES Electrical Performance Characteristics ( continued ) For Notes to Electrical Performance Characteristics Table, refer to page 5 Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Input current, no load ( IIN ) ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D 1,2,3 I OUT = 0, Pin 4 open 100 100 mA Input current inhibited 1,2,3 Pin 4 shorted to pin 2 8.0 mA Output ripple ( VRIP ) ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D 1,2,3 VIN = 16, 28, 50 Volts IOUT = 100% rated load Notes 4, 6 mV p-p Switching frequency ( FS ) 1,2,3 Sync. Input (Pin 4) open 425 500 575 KHz Efficiency ( EFF ) ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D 1,2,3 I OUT = 100% rated load Note 4 Enable Input ( Inhibit Function ) open circuit voltage drive current ( sink ) voltage range 1,2,3 Note 1 9.5 -0.5 11.5 500 V µA V Current Limit Point Expressed as a percentage of full rated load current 1,2,3 V out = 90% of Nominal, Note 4 105 130 % Power dissipation, load fault (PD) 1,2,3 Short Circuit, Overload, Note 8 14 W Output response to step load changes (VTLD) 4,5,6 Half Load to/from Full Load, Notes 4,9 -300 300 mV pk Recovery time, step load changes (TTLD) 4,5,6 Half Load to/from Full Load, Note 4,9,10 200 µs Output response to step line changes (VTLN) 4,5,6 16V to/from 50V IOUT = 100% rated load, Notes 1,4,11 -300 300 mV pk Recovery Time, step line changes (TTLN) 4,5,6 16V to/from 50V IOUT = 100% rated load, Notes 1,4,10,11 200 µs Turn-on Response Overshoot (VOS) Turn-on Delay (TDLY) 4,5,6 No Load, Full Load Notes 4,12 2.0 500 mV ms

www.irf.com 5 ATS-SERIES Electrical Performance Characteristics ( continued ) Notes for Electrical Performance Characteristics Table 1. Parameter is tested as part of design characterization or after design changes. Thereafter, parameter shall be guaranteed to the limits specified. 2. Parameter verified during line and load regulation tests. 3. Output load current must be distributed such that at least 20% of the total load current is being provided by one of the outputs. 4. Load current split equally between outputs on dual output models. 5. Cross regulation is measured with 20% rated load on output under test while changing the load on the other output from 20% to 80% of rated. 6. Guaranteed for a D.C. to 20MHz bandwidth. Tested using a 20KHz to 10MHz bandwidth using the circuit on page 6. 7. 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 may interfere with the proper operation of the converter’s overload protection, causing erratic behavior during turn-on. 8. Overload power dissipation is defined as the device power dissipation with the load set such that V OUT = 90% of nominal. 9. Load step transition time ≥ 10µs. 10. Recovery time is measured from the initiation of the transient to where V OUT has returned to within ±1.0% of its steady state value. 11. Line step transition time ≥ 100µs. 12. Turn-on delay time from either a step application of input power or a logic low to a logic high transition on the inhibit pin (pin 4) to the point where V OUT = 90% of nominal. 13. For operation at temperatures between +85 °C and +125 °C, derate the maximum input voltage linearly from 100% to 75%. Limits Parameter Group A Subgroup Conditions -55°C ≤ TC ≤ +85°C VIN = 28V DC ± 5%, CL = 0 unless otherwise specified Min Nom Max Unit Capacitive Load (CL) ATS2803R3S ATS2805S ATS2812S ATS2815S ATS2805D ATS2812D ATS2815D I OUT = 100% rated load No effect on DC performance Notes 1, 4, 7 Each output on duals 2200 1000 180 120 500 µF Line Rejection 1 I OUT = 100% rated load DC to 50KHz, Notes 1, 4 40 50 dB Isolation 1 Input to Output or Any Pin to Case except pin 3, test @ 500VDC 100 MΩ Device Weight 85 g MTBF MIL-HDBK-217F2, GM, 35°C TBD Hr

6 www.irf.com ATS-SERIES Circuit for Measuring Output Ripple Voltage + Vout ReturnDUT RL for IRATED 0.1 µF 50 Ω Coax50 Ω Oscilloscope or equivalent with 10 MHz bandwidth, multiply readings by 2. 1 µF 50 Ω Termination

Figure 3. Block Diagram - Single Output Figure 4. Block Diagram - Dual Output

6 OUTPUT

5 OUTPUT

www.irf.com 9 ATS-SERIES Mechanical Outline Pin ø 0.040 ø 0.128

4 Plcs

2.300 1.5500.375 0.8500.350 1.500 1.750 2.000 2.80 Ref 0.250 0.425 Max 0.050 0.470 1423 0.400

2 Eq Spaces

@ 0.200 5 876 0.270 1.000 Ref 0.400 0.400 0.200 Tolerance: .XX = ±0.01 .XXX = ±0.005 0.220 0.25 Typ. Pin Designation (Single/Dual) Pin # Single Dual 1 + Input + Input

2 Input Return Input Return

3 Case Case

4 Inhibit Inhibit

5 Output Adjust Output Adjust

6 Output Return - Vout

8 NC + Vout

10 www.irf.com ATS-SERIES Part Numbering 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. 01/2007 Notes: /G129 Best commercial practice /G130 Sample tests at low and high temperatures /G131 -55°C to +105°C for AHE, ATO, ATW ATS 28 05 S /CH Model Input Voltage 28 = 28V Output Voltage Single: 03R3 = 3.3V, 05 = 5V 12 = 12V, 15 = 15V Dual: 05 = ±5V, 12 = ±12V 15 = ±15V Output S = Single D = Dual Screening Level (Please refer to Screening Table) No Suffix, ES, HB, CH Device Screening Requirement MIL-STD-883 Method No Suffix ES /c100 HB CH Temperature Range -20°C to +85°C -55°C to +125°C /c101 -55°C to +125°C -55°C to +125°C Element Evaluation MIL-PRF-38534 N/A N/A N/A Class H Non-Destructive Bond Pull Internal Visual 2017 /c99 Yes Yes Yes Temperature Cycle 1010 N/A Cond B Cond C Cond C Constant Acceleration 2001, Y1 Axis N/A 500 Gs 3000 Gs 3000 Gs PIND 2020 N/A N/A N/A N/A Burn-In 1015 N/A 48 hrs@hi temp 160 hrs@125°C 160 hrs@125°C Final Electrical MIL-PRF-38534 25°C 25°C /c100 -55°C, +25°C, -55°C, +25°C, ( Group A ) & Specification +125°C +125°C PDA MIL-PRF-38534 N/A N/A N/A 10% Seal, Fine and Gross 1014 Cond A Cond A, C Cond A, C Cond A, C Radiographic 2012 N/A N/A N/A N/A External Visual 2009 /c99 Yes Yes Yes N/A N/A2023 N/A N/A