ATR2812T

HYBRID-HIGH RELIABILITY DC-DC CONVERTER PD-94551E ATR28XXT SERIES 28V Input, Triple Output Description The ATR28XXT Series of DC-DC converters provide 30W 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 500V 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 16V to 40V 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 fold back mode. The converters will shut down for approximately 15ms, 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 fully qualif...