FAN7621SJX

FAIRCHILD SEMICONDUCTOR  FAN7621SJX  控制器, PFM, 100 kHz, SOIC-16

The is a PFM Controller for half-bridge resonant converters. Offering everything necessary to build a reliable and robust resonant converter, the FAN7621 simplifies designs and improves productivity, while improving performance. The FAN7621 includes a high-side gate drive circuit, an accurate current controlled oscillator, frequency limit circuit, soft-start and built-in protection functions. The high-side gate-drive circuit has a common-mode noise cancellation capability, which guarantees stable operation with excellent noise immunity. Using the zero-voltage-switching ZVStechnique dramatically reduces the switching losses and efficiency is significantly improved. The ZVS also reduces the switching noise noticeably, which allows a small-sized Electromagnetic Interference EMI filter. It can be applied to various resonant converter topologies; such as series resonant, parallel resonant and LLC resonant converters.

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High efficiency through zero voltage switching ZVS

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350ns Fixed dead time

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Pulse skipping for frequency limit programmable at light-load condition

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Remote on/off control using CON Pin

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Over-voltage protection OVP

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Overload protection OLP

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Abnormal over-current protection AOCP

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Internal thermal shutdown TSD