FEATURES

? Low Cost Solution Built-in 800V power BJT

? Quasi-Resonant Primary Side Regulation

(QR-PSR) Control with High Efficiency

? Multi-Mode PSR Control

? Fast Dynamic Response

? Built-in Dynamic Base Drive

? Audio Noise Free Operation

? ±4% CC and CV Regulation

? Low Standby Power <70mW

? Programmable Cable Drop Compensation

(CDC) in CV Mode

? Built-in AC Line & Load CC Compensation

? Build in Protections:

? Short Load Protection (SLP)

? Cycle-by-Cycle Current Limiting

? Leading Edge Blanking (LEB)

? Pin Floating Protection

? VDD OVP & UVP & Clamp

? Over temperature protection(OTP)

? Available with DP3773A Versions in SOP-7

Package

APPLICATIONS

? Battery Chargers for Cellular Phones

? AC/DC Power Adapter and LED Lightings

GENERAL DESCRIPTIONDP3773A is a high performance Quasi Resonant(QR) Primary Side Regulation (PSR) PWMpowerswitch with high precision CV/CCcontrol ideal forcharger applications.

In CV mode, DP3773A adopts Multi ModeQRControl which uses the hybrid of AM(AmplitudeModulation) mode and (Frequency Modulation)FM mode to improve systemefficiencyandreliability. In CC mode, the ICuses PFMcontrol

with line and load CC compensation. TheICcanachieve fast dynamic response. The built-inCableDrop Compensation (CDC) function canprovideexcellent CV performance. DP3773A integrates functions and protectionsofUnder Voltage Lockout (UVLO), VDDover VoltageProtection (VDD OVP), Cycle-by-cycleCurrentLimiting (OCP), Short Load Protection(SLP), On-Chip Thermal Shutdown, VDD Clamping, etc.