USRB01G-S08-R datasheet(6/7 Pages) UTC

Part #	USRB01G-S08-R

Description	HIGH PRECISION CC/CV PRIMARY SIDE SWITCH

PDF	7 Pages

Scroll/Zoom	100%

Manufacturer	UTC [Unisonic Technologies]

Direct Link	http://www.utc-ic.com

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6 / 7 page

USRB01

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD

6 of 7

www.unisonic.com.tw

QW-R103-080.c

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OPERAT I ON DESCRI PT I ON (Cont .)

Drive BJT

The driver is a push pull stage with the supply voltage VDD. It provides the driving current for the external power

bipolar transistor. The output signal is current-limited to IOUT(SOURCE).

Protection Control

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

voltage protection, OTP, feedback loop open protection, Cycle-by-cycle current limiting, short circuit protection,

leading edge blanking and UVLO, etc.

VDD is supplied by transformer auxiliary winding output. The output of UTC USRB01 is shutdown when VDD drops

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

USRB01G-S08-R Datasheet(PDF) 6 Page - Unisonic Technologies