Description

This highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology enables most simplified circuit design especially for battery charger applications. A low-cost, smaller, and lighter charger results when compared to a conventional design or a linear transformer. The startup current is only 10μA, which allows large startup resistance for further power saving.

Features

● Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry

● Green-Mode Function: PWM Frequency Linearly Decreasing

● Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problems

● Cable Compensation in CV mode

● Low Startup Current: 10μA

● Low Operating Current: 3.5mA

● Peak-Current-Mode Control in CV Mode

● Cycle-by-Cycle Current Limiting

● VDD Over-Voltage Protection (OVP) with Auto-Restart

● VDD Under-Voltage Lockout (UVLO)

● Fixed Over-Temperature Protection (OTP) with Latch

● DIP-8 Package Available

Applications

● Battery Chargers for Cellular Phones, Cordless Phones, PDA, Digital Cameras, Power Tools

● Best Choice to Replace Linear Transformer and RCC SMPS