CR6236

CR623X—CR6235/6236/6237/6238 High Precision CC/CV Primary-Side PWM Power Switch Features Up to 5% Precision for Constant Voltage Regulation and Constant Current Regulation at Universal AC input Primary-side Sensing and Regulation Without TL431 and Opto-coupler Flyback Topology In DCM Operation Soft-start Built-in Leading Edge Blanking (LEB) Frequency Jitter to Reduce System EMI Programmable CV and CC Regulation Adjustable Constant Current and Output Power Setting Built-in Secondary Constant Current Applications Cell Phone /Digital Cameras Charger Small Power Adaptor General Description CR623X is a high performance offline PWM power switch for low power AC/DC charger and adaptor applications. It operates in primary-side sensing and provides constant voltage (CV) and constant current (CC) regulation without TL431 and opto-coupler. A typical output CC/CV curve is shown as in the Fig.1. Fig.1. Typical CC/CV Curve Control with Primary Side Feedback Built-in Secondary Constant Voltage Sampling Controller Program Cable Drop Compensation Rich Protections For System Reliability including VDD Under Voltage Lockout with Hysteresis (UVLO) Cycle-by-Cycle Current Limiting and Peak Current Protection (OCP) Over Temperature Protection (OTP) VDD Over Voltage Protection (OVP) VDD Clamp Lead-free SOP-8L & DIP-8L Auxiliary Power for PC, TV etc. Linear Regulator/RCC Replacement In CC mode, the current point and maximum output power setting can be adjusted by the sense resistor RS at CS pin. In...