Description

This highly integrated PWM controller, FAN100, provides several features to enhance the performance of low-power flyback converters. The proprietary topology enables simplified circuit design 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 use of large startup resistance for further power saving.

Features

• Constant-Voltage (CV) and Constant-current (CC) Control without Secondary-feedback Circuitry

• Green Mode PWM Frequency Linearly Decreasing

• Fixed PWM Frequency at 42kHz with Frequency Hopping to Solve EMI Problem

• 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 with Auto-Restart

• VDD Under-Voltage Lockout (UVLO)

• Gate Output Maximum Voltage Clamped at 18V

• Fixed Over-temperature Protection with Latch

• SOP-8 Package Available

Applications

• Battery chargers for cellular phones, cordless phones, PDA, digital cameras, power tools

• Replaces linear transformer and RCC SMPS