Description
This highly integrated PWM controller, FSEZ1216, provides several features to enhance the performance of low-power flyback converters. The proprietary topology of FSEZ1216 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 Function: PWM Frequency Linearly Decreasing
■ Fixed PWM Frequency at 42kHz with Frequency Hopping to Solve EMI Problem
■ 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 with Auto-Restart
■ VDD Under-Voltage Lockout (UVLO)
■ Fixed Over-Temperature Protection with Latch
■ DIP-8 Package Available

APPLICATIONs
■ Battery chargers for cellular phones, cordless phones, PDA, digital cameras, power tools
■ Replaces linear transformer and RCC SMPS