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ATR2812TF/ES Datasheet(PDF) 1 Page - International Rectifier |
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ATR2812TF/ES Datasheet(HTML) 1 Page - International Rectifier |
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1 / 6 page  12/08/04 www.irf.com 1 HYBRID-HIGH RELIABILITY DC/DC CONVERTERS ATR28XXT SERIES Description n 30 Watt Output Power n Flexible Output Loading n -55°C to +125°C Operation n Pin Compatible with ATO n 0.410” Maximum Height n 16 to 40 VDC Input Range n 500 Volt Input to Output Isolation n High Audio Rejection n MIL-STD-704 Compatible n Load Fault Protection - Short Circuit and Overload n TTL level Compatible Synchronization Features ATR 28V Input, Triple Output Two grades with more limited screening are also available for use in less demanding applications. Variations in electrical, mechanical and screening can be limited accomodated. Contact IR Santa Clara with specific requirements. The ATR28XXT Series of DC/DC converters provide 30 watts of output power over the full military temperature range with no derating. These devices are pin compatible with the ATO series converters but offer twice the maximum output power in a lower profile package. A custom CMOS ASIC pulse width modulator operating at a nominal switching frequency of 550KHz combined with a unique magnetic feedback reduces circuit complexity for enhanced reliability. These converters provide 500 volt input to output isolation and operate in highly efficient single forward mode. The advanced feedback design and high operating frequency provide an extremely wide bandwidth control loop with high gain and phase margin. This results in fast dynamic line and load response as well as superior audio rejection. The control loop is compensated to provide optimum performance over the full military temperature range and over the 16 to 40 volt input voltage range. These converters are protected against both continuous output short circuits and output overload. Either load fault condition will result in operating in a low power dissipation foldback mode. The converters will shut down for approximately 15 milliseconds, then attempt to restart. This cycle will continue indefinitely unless the load fault is corrected. Recovery to normal operation is automatic upon removal of the load fault. Manufactured in a facility full qualified to MIL-PRF- 38534, 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 element evaluation and Periodic Inspections (PI) are not required. Both grades are tested to meet the complete group “A” test specification over the full military temperature range without output power deration. PD-94551A |
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