FSEZ1317 Datasheet | Fairchild Semiconductor

Features - Low Standby Power Under 30m W - High-Voltage Startup - Fewest External ponent Counts - Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry - Green-Mode: Linearly Decreasing PWM Frequency - Fixed PWM Frequency at 50k Hz with Frequency Hopping to Solve EMI Problem - Cable pensation 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 and DIP Packages 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 FSEZ1317 enables precise CC regulation and simplified circuit design for batterycharger applications. A low-cost, smaller, and lighter charger results, as pared to a conventional design or a linear transformer. To minimize standby power consumption, the proprietary green mode provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green mode assists the power supply in meeting power conservation requirements. By using the FSEZ1317, a charger can be implemented with few external ponents and minimized cost. A typical output CV/CC characteristic envelope is shown in Figure 1. Applications - Battery chargers for cellular phones, cordless phones, PDA, digital cameras, power tools, etc. - Replaces linear transformers and RCC SMPS Figure 1. Typical Output V-I Characteristic Ordering Information Part Number FSEZ1317MY FSEZ1317NY Operating Temperature Range -40°C to +105°C -40°C to +105°C Package 7-Lead, Small Outline Package (SOP-7) 7-Lead, Dual Inline Package (DIP-7) Packing Method Tape & Reel Tube © 2010 Fairchild Semiconductor Corporation FSEZ1317 - Rev. 2,...