PL3378 datasheet(2/8 Pages) PMICRO

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Datasheet

PL3378

Overview

PL3378 is a high efficiency Primary Side

Regulator and highly integrated PWM Power

Switch

for AC/DC power supply applications. It

simplifies conventional CC/CV charger/adaptor

designs by eliminating the opto-coupler and

secondary control circuitry. Constant output

voltage and current regulation is realized

Multi-mode operations are utilized to achieve

low standby power, high efficiency and audio &

noise free. PL3378 operates in PFM mode at

large load condition, with the load becomes

medium or light, the chip operates in Green

mode to achieve high efficiency. This

green-mode function assists the power supply

meeting the power conservation requirement.

A complete set of integrated protection

functions allows PL3378 to protect against all

fault conditions including Cycle-by-Cycle peak

current limiting, VDD UVLO, and VDD_Clamp.

The switch continues attempting start-up until

the fault condition is removed.

PL3378 is offered in SOP7 package.

Features



Built-in Integrated Power BJT



Accurate Constant Current Regulation at

Universal AC input



Eliminates Opto-coupler and all Secondary

CC/CV Control Circuitry



Built-in Line Compensation for Tighter

CC/CV Regulation



Built-in Compensation for Transformer

Inductance Tolerances



Output Cable Compensation



Adaptive Multi-mode PFM Control for

Improving Efficiency



Low Start-up Current



Built-in Short Circuit Protection



Built-in open Circuit Protection



LEB



OCP



VDD_OVP



UVLO



OTP

PL3378 데이터시트(PDF) 2 Page - Suzhou Juyuan Microelectronics Co., Ltd

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