Description

This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT® , of FSEZ1317A enables precise CC regulation and simplified circuit design for battery charger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer.

Features

Low Standby Power Under 30mW

High-Voltage Startup

Fewest External Component Counts

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

Green-Mode: Linearly Decreasing PWM Frequenc

Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem

Cable Compensation in CV Mode

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 15V

Fixed Over-Temperature Protection with Auto Restart

Available in the 7-Lead SOP Package

Applications

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

Replaces linear transformers and RCC SMPS