UPSRB03G-AF5-R datasheet(6/7 Pages) UTC

部品番号	UPSRB03G-AF5-R

部品情報	HIGH PRECISION CC/CV PRIMARY SIDE SWITCHING REGULATOR

PDF	7 Pages

Scroll/Zoom	100%

メーカー	UTC [Unisonic Technologies]

ホームページ	http://www.utc-ic.com

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6 / 7 page

UPSRB03

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD

6 of 7

www.unisonic.com.tw

QW-R129-020.a



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 output

over-voltage protection, VDD over voltage protection, 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 UPSRB03 is shutdown when VDD drops

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

UPSRB03G-AF5-R データシート(PDF) 6 Page - Unisonic Technologies