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