UC3837LG-AG6-R datasheet(8/11 Pages) UTC

Part #	UC3837LG-AG6-R

Description	LOW COST POWER-SAVING MODE PWM CONTROLLER

PDF	11 Pages

Scroll/Zoom	100%

Manufacturer	UTC [Unisonic Technologies]

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

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8 / 11 page

UC3837L

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

8 of 11

www.unisonic.com.tw

QW-R103-145.A

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OPERATION DESCRIPTION (Cont.)

OVP

The OVP will shut down the switching of the power MOSFET whenever VDD>VOVP. The OVP event as followed

Fig.3.

OLP

OLP will shut down driver when VFB>VOLP for continual a blanking time. The OLP event as followed Fig.4.

OTP

OTP will shut down driver when the IC temperature TJ>T (THR).

PCB Layout Note

Noise from the current sense or the control signal can cause significant pulse width jitter in continuous-conduction

mode, and slope compensation helps alleviate these problems. Good placement and layout practices should be

followed. Avoiding long PCB traces and component leads, locating compensation and filter components near the

UTC UC3837L, and increasing the power MOS gate resistance is advised.

UC3837LG-AG6-R Datasheet(PDF) 8 Page - Unisonic Technologies