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Fairchild introduces three power switch products feature burst mode operation for stand-by mode (under 0.1 W @ 265 VAC). The FSD200, FSD210, and FSDM311 combine a fully avalanche-rated SenseFET (LDMOS) for current sensing (650 V or 700 V minimum breakdown ratings) with a voltage mode PWM IC, and are equipped with a built-in start-up switch. They operate from 6.7 V to 21 V at a frequency of 134 kHz with frequency modulation for low EMI. The FSD200 and FSD210 are available in 7-DIP packages. The FDSM311 is available in an 8-DIP package.

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