US3651G-S08-R datasheet(8/8 Pages) UTC

8 / 8 page

US3651

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

8 of 8

www.unisonic.com.tw

QW-R502-947.h



OPERATION DESCRIPTION(Cont.)

Protection Control

Good power supply system reliability is achieved with its comprehensive protection features including VDD

over-voltage protection, VDD Clamp, GATE Clamp, Power on soft start, Cycle-by-cycle current limiting, short circuit

protection, leading edge blanking, OTP and UVLO, etc.

VDD is supplied by transformer auxiliary winding output. The output of UTC US3651 is shutdown when VDD drops

below VTH(OFF) and the power converter enters power on start-up sequence thereafter.



TYPICAL APPLICATION CIRCUIT

DRAIN

GND

INV

COMP

VDD

UTC

US3651

RCS

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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