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

No de pièce	USRB01G-S08-R

Description	HIGH PRECISION CC/CV PRIMARY-SIDE PWM POWER SWITCH

PDF	7 Pages

Scroll/Zoom	100%

Fabricant	UTC [Unisonic Technologies]

Site Internet	http://www.utc-ic.com

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6 / 7 page

USRB01

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 7

www.unisonic.com.tw

QW-R103-080.b

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OPERATION DESCRIPTION (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 Fiches technique(PDF) 6 Page - Unisonic Technologies