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SMD Listing DHC2805SH - 9 Pages

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Catalogue excerpts

M.S.KENNEDY CORP. FEATURES: 70% Typical Efficiency All Ceramic Capacitors Surface Mount Magnetics Withstands 5000G MIL STD 461C CE03 (With EFJ2803 Filter) 80 Volt Input Transient Tolerent No Derating - -55°C to +125°C Wide Supply Range - 10V to 50V High Isolation - 500V High Power Density - 17W/in³ Output Voltage Adjustment - Standard Remote Shutdown Operates to 11V Input at 5W Available with 3.3V or 5V Outputs See DAC2800s Series for 12V and 15V Versions Available to DSCC SMD 5962-94629 and 5962-93092 DESCRIPTION: The DHC2800S series of DC-DC converters provides the ruggedness, reliability and features required to meet the advanced design challenges of today's hi-rel market. The use of advanced substrate and reflow soldering techniques during construction results in a rugged, cost-effective and completely solderable package. DHC2800S hybrid converter series utilizes all ceramic capacitors and surface mount magnetics to provide reliable operation at all operating temperatures while surviving very high G forces. DHC2800S standard features include output fault monitoring and/or turn on voltage point programming via the shutdown pin. All three functions may be implemented simultaneously with a minimum of external components. An output voltage adjustment/load compensation pin is also standard. Fault tolerant design protects these converters from most external circuit faults. The output and output adjust pins will withstand +35V while the shutdown pin will withstand +50V protecting the converters from a variety of system or board faults i.e. solder bridges, etc. Unique load fault protection circuitry allows this converter to pull up loads having difficult static load line characteristics and allows short term load excursions significantly beyond ratings in most applications. A transformer isolated forward converter topology operating at a switching frequency of 400kHz allows operation over a wide input voltage range. Internal filtering of both input and output eliminates the need for external capacitors in many applications. The 8-pin DIP package is hermetically sealed and isolated from the internal circuits. Heat sinking is recommended for full power operation at elevated ambient temperatures.

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EQUIVALENT SCHEMATIC PIN-OUT INFORMATION Isolated Step Down Power Supply Microprocessor Power Source Low Voltage Subsystem Power Source +Output -Output Adjust/Comp NC Shutdown Plus 8 Case 7 -Input 6 +Input TST Storage Temperature Range TLD Lead Temperature Range (10 Seconds) PD Power Dissipation TJ Junction Temperature θJC Thermal Resistance (Switches) +50V VIN Input Voltage (pin 7 to pin 6) Input Transient (pin 7 to pin 6 @ 50mS) 80V VINT Output Current IOUT DHC2803S 2.0A DHC2805S 1.5A Case Temperature Range TC DHC2800S H/E -55°C to +125°C DHC2800S -40°C to +85°C ABSOLUTE MAXIMUM RATINGS NOTE:...

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ELECTRICAL SPECIFICATIONS Output Voltage 12V≤VIN≤50V Output Current 2 16V≤VIN≤50V Output Voltage Ripple Input Current Ripple 2 Line Regulation Load Regulation Step Load Response Step Line Recovery 2 Step Line Response 2 Step Load Recovery Shutdown Delay 2 Shutdown Recovery 2 Input Voltage Range 2 Quiescent Current Capacitive Load 2 Isolation Input to output or any pin to case @ 500V Short Circuit Current Limit 7 Switching Frequency VOUT Adjustment Range NOTES: +VIN = 28V, IOUT = 1.8A for DHC2803S, IOUT = 1.0A for DHC2805S, TA=TC=25°C unless otherwise specified. Guaranteed by design but not tested....

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ELECTRICAL SPECIFICATIONS Output Voltage 12V≤VIN≤50V Output Current 2 16V≤VIN≤50V Output Voltage Ripple Input Current Ripple 2 Line Regulation Load Regulation Step Load Response Step Line Recovery 2 Step Line Response 2 Step Load Recovery Shutdown Delay 2 Shutdown Recovery 2 Input Voltage Range 2 Quiescent Current Capacitive Load 2 Isolation Input to output or any pin to case @ 500V Short Circuit Current Limit 7 Switching Frequency VOUT Adjustment Range +VIN = 28V, IOUT = 1.8A for DHC2803S, IOUT = 1.0A for DHC2805S, TA=TC=25°C unless otherwise specified. Guaranteed by design but not tested. Typical...

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APPLICATION NOTES POWER SUPPLIES LOAD FAULT RESPONSE The output voltage of the DHC2800S may be adjusted from 90% to 110% of nominal value by the use of a 50KΩ potentiometer as shown. Adjustment beyond this range is possible however certain characteristics of the converter such as but not limited to input voltage range, efficiency, ripple and temperature performance will change. Characterization by the user is recommended in such applications. The DHC2800S series of dc-dc converters share load fault philosophies. Load fault conditions include short-circuit and severe overload conditions. The DHC2800S...

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TYPICAL APPLICATION CIRCUIT

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TYPICAL PERFORMANCE CURVES DHC2803S EFFICIENCY CONTOURS EFFICIENCY CONTOURS .9A IOUT INCLUDES 1000µF ON OUTPUT BUS .9A IOUT NO OUTPUT BUS CAPCITANCE LOAD TRANSIENT RESPONSE 100µF LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 1000µF OUTPUT RESPONSE, X OUT(1V/DIV) V (UNITS/DIV) 0.5 1.0 1.5 2.0 OUTPUT CURRENT, IOUT (A) LOAD TRANSIENT RESPONSE OUTPUT RESPONSE, VOUT(50mV/DIV) X (UNITS/DIV) 10V 50mV OUTPUT DC CURRENT RATING VOUT(1V/DIV) OUTPUT RESPONSE, X (UNITS/DIV) OUTPUT RESPONSE, VOUT(100mV/DIV) X (UNITS/DIV) OUTPUT RESPONSE, X OUT(1V/DIV) V (UNITS/DIV) EFFICIENCY CONTOURS AUDIO...

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TYPICAL PERFORMANCE CURVES DHC2805S EFFICIENCY CONTOURS EFFICIENCY CONTOURS EFFICIENCY CONTOURS LOAD TRANSIENT RESPONSE LOAD TRANSIENT RESPONSE 100µF LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE OUTPUT RESPONSE, VOUT(1V/DIV) X (UNITS/DIV) LOAD TRANSIENT RESPONSE 1000µF OUTPUT RESPONSE, VOUT(100mV/DIV) X (UNITS/DIV) 0.4 0.8 1.2 1.6 OUTPUT CURRENT, IOUT (A) OUTPUT RESPONSE, VOUT(50mV/DIV) X (UNITS/DIV) 10V 50mV OUTPUT DC CURRENT RATING VOUT(1V/DIV) OUTPUT RESPONSE, X (UNITS/DIV) 11 .12 .24 .48 .78 .96 1.2 OUTPUT CURRENT, IOUT (A) OUTPUT RESPONSE, X OUT(1V/DIV) V(UNITS/DIV) AUDIO REJECTION VIN...

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MECHANICAL SPECIFICATIONS ESD TRIANGLE INDICATES PIN 1 WEIGHT= 14.5 GRAMS TYPICAL CONTAINS INTERNAL BeO (BERYLLIUM OXIDE) ALL DIMENSIONS ARE ±0.010 INCHES UNLESS OTHERWISE LABELED Screening Level Output Voltage Industrial Extended Reliability Mil-PRF-38534 Class H Industrial Extended Reliability Mil-PRF-38534 Class H DSCC-SMD for DHC2805S DSCC-SMD for DHC2805S M.S. Kennedy Corp. 4707 Dey Road, Liverpool, New York 13088 Phone (315) 701-6751 FAX (315) 701-6572 www.mskennedy.com The information contained herein is believed to be accurate at the time of printing. MSK reserves the right to make changes...

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