|Category||Power Management => DC-DC Converters|
|Description||28V/66W DC/DC Converter Vin=16-50V, Vo=3.3V@21A W/emi Filter|
|Datasheet||Download ADDC02803SC datasheet
FEATURES V dc Input, 100 W Output V dc Input, 66 W Output (ADDC02803SC) Integral EMI Filter Designed to Meet MIL-STD-461D Low Weight: 80 Grams NAVMAT Derated Many Protection and System Features
SENSE + SENSE ADJUST STATUS RETURN VAUX INHIBIT SYNC ISHARE TEMP VIN +VIN EMI FILTER INPUT SIDE CONTROL CIRCUIT FIXED FREQUENCY DUAL INTERLEAVED POWER TRAIN RETURN OUTPUT FILTER RETURN +VOUT OUTPUT SIDE CONTROL CIRCUIT
APPLICATIONS Commercial and Military Airborne Electronics Missile Electronics Space-Based Antennae and Vehicles Mobile/Portable Ground Equipment Distributed Power Architecture for Active Array Radar
The ADDC02803SC and ADDC02805SA hybrid dc/dc converters with integral EMI filters offer the highest power density of any dc/dc converter with their features and in their power range available today. The converters with integral EMI filters are fixed frequency, 1 MHz square wave switching dc/dc power supplies. They are not variable frequency resonant converters. In addition to many protection features, these converters have system level features that allow them to be used as components in larger systems as well as stand-alone power supplies. The units are designed for high reliability and high performance applications where saving space and/or weight are critical. The ADDC02803SC and ADDC02805SA are available in three screening grades; all grades use a hermetically sealed, molybdenum based hybrid package. Three screening levels are available, including military SMD.
to 60 W/cubic inch power density with an integral EMI filter designed to meet all applicable requirements in MILSTD-461D when installed in a typical system setup. 2. Light weight: 80 grams 3. Operational and survivable over a wide range of input conditions: V50 V dc; survives low line, high line and positive and negative transients. See section entitled: Input Voltage Range. 4. High reliability; NAVMAT derated 5. Protection features include: Output Overvoltage Protection Output Short Circuit Current Protection Thermal Monitor/Shutdown Input Overvoltage Shutdown Input Transient Protection 6. System level features include: Current Sharing for Parallel Operation Inhibit ControlOutput Status Signal Synchronization for Multiple Units Input Referenced Auxiliary Voltage Supply
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998
Parameter INPUT CHARACTERISTICS Steady State Operating Input Voltage Range 1 Abnormal Operating Input Voltage Range (Per MIL-STD-704D)1 Input Overvoltage Shutdown No Load Input Current Disabled Input Current OUTPUT CHARACTERISTICS 2, 3 Output Voltage (VO) Case Temp Full +25°C Full +25°C Full +25°C Full +25°C
(TC = +25C, VIN 0.5 V dc, unless otherwise noted; full temperature range to +90C; all temperatures are case and TC is the temperature measured at the center of the package bottom.)
Line Regulation Load Regulation Output Ripple/Noise4 Output Current (IO) Output Overvoltage Protection Output Current Limit Output Short Circuit Current ISOLATION CHARACTERISTICS Isolation Resistance
DYNAMIC CHARACTERISTICS Output Voltage Deviation Due to Step Change in Load +25°C V Response Time Due to Step Change in Load +25°C V Soft Start Turn-On Time 5 THERMAL CHARACTERISTICS Efficiency I +25°C Max Min +25°C Max Min VI V
10 A di/dt 10 A, di/dt 0.5 A/ µs, Time for VOUT to Return within 2% of Final Value 20 A, From Inhibit High to Status High 2 A IOH 400 µA IOL 1 mA IAUX = 5 mA, Load Current 20 A
Hottest Junction Temperature 6 CONTROL CHARACTERISTICS Clock Frequency ADJUST (Pin 3) V ADJ STATUS (Pin 4) VOH VOL VAUX (Pin 5) VO (nom) INHIBIT (Pin 6) VIL IIL VI (Open Circuit) SYNC (Pin 7)7 VIH IIH ISHARE (Pin 8) TEMP (Pin 9)
V dc upper limit rated for transient condition to 50 ms. V dc lower limit rated for continuous operation during emergency condition. Steady state and abnormal input voltage range require source impedance sufficient to insure input stability at low line. See sections entitled System Instability Considerations and Input Voltage Range. 2 Measured at the remote sense points. 3 Unit regulates output voltage to zero load. 4 CLOAD 0. 5 Output is fully loaded into a constant resistive load. 6 Refer to section entitled Thermal Characteristics for more information. 7 Unit has internal pull-down; refer to section entitled Pin 7 (SYNC). Specifications subject to change without notice.
INHIBIT. 50 V dc, V dc SYNC. 8.0 V dc, V dc ISHARE. 6 V dc, V dc TEMP. 12 V dc, V dc Common-Mode Voltage, Input to Output. V dc Lead Soldering Temp (10 sec). +300°C Storage Temperature. to +150°C Maximum Junction Temperature. +150°C Maximum Case Operating Temperature. +125°C
*Absolute maximum ratings are limiting values, to be applied individually, and beyond which the serviceability of the circuit may be impaired. Functional operability under any of these conditions is not necessarily implied. Exposure of absolute maximum rating conditions for extended periods of time may affect device reliability.Description
to +85°C Hermetic Package to +90°C Hermetic Package to +125°C Hermetic Package to +85°C Hermetic Package to +90°C Hermetic Package to +125°C Hermetic Package
100% production tested. 100% production tested at +25°C, and sample tested at specified temperatures. Sample tested only. Parameter is guaranteed by design and characterization testing. Parameter is a typical value only. All devices are 100% production tested +25°C. 100% production tested at temperature extremes for military temperature devices; guaranteed by design and characterization testing for industrial devices.
Feedback loop connection for remote sensing output voltage. Must always be connected to output return for proper operation. +SENSE Feedback loop connection for remote sensing output voltage. Must always be connected to +VOUT for proper operation. ADJUST Adjusts output voltage setpoint. STATUS Indicates output voltage is within 5% of nominal. Active high referenced to SENSE (Pin 1). VAUX Low level dc auxiliary voltage supply referenced to input return (Pin 10). INHIBIT Power Supply Inhibit. Active low and referenced to input return (Pin 10). SYNC Clock synchronization input for multiple units; referenced to input return (Pin 10). ISHARE Current share pin which allows paralleled units to share current typically within 5% at full load; referenced to input return (Pin 10). TEMP Case temperature indicator and temperature shutdown override; referenced to input return (Pin 10). VIN Input Return. +VIN +28 V Nominal Input Bus. +VOUT V dc Output V dc Output (ADDC02803SC). +VOUT V dc Output V dc Output (ADDC02803SC). +VOUT V dc Output V dc Output (ADDC02803SC). RETURN Output Return. RETURN Output Return. RETURN Output Return.
CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
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