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Designed to satisfy the power supply requirements of automotive, industrial, and consumer applications, the A8660 includes all the control and protection circuitry to produce a robust PWM controller delivering high current.
The A8660 includes PWM frequency dithering, which has been shown to reduce EMI/EMC. A soft recovery feature prevents output voltage overshoot when the converter comes out of a low VIN dropout condition. For high current, low frequency designs (<520 kHz), an external clock can be applied to the SYNCIN pin to shift the PWM harmonics, thus avoiding AM band interference with a tuner or other sensitive electronics.
The A8660 has external compensation so it can be tuned to satisfy various system goals over a wide range of PWM frequencies and external components. It includes adjustable soft start to minimize inrush current. Additionally, it monitors the feedback voltage to provide an open-drain NPOR signal with adjustable delay time.
Extensive protection features of the A8660 include pulse-by pulse current limit, hiccup mode short-circuit protection, BOOT open/short voltage protection, VIN undervoltage lockout, VOUT overvoltage protection, and thermal shutdown. The A8660 is supplied in a low profile 20-pin QFN package (suffix “ES”) with exposed power pad.