FSEZ1317AMY_F116

Features

● Low Standby Power Under 30mW

● High-Voltage Startup

● FewestExtemal Component Counts

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

● Green-Mode:Linearly Decreasing PWMFrequency

● Fixed PWMFrequency 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-VoltageLockout (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

Description

This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flybackconverters.The_. proprietary_topology. TRUECURREN, ofFSEZ1317A 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.

To minimizestandbypowerconsumption, th eproprietary green mode provides off-time modulation to iinearly decrease PwM frequency under light-load conditions. Green mode assists the power supply in meeting power conservation requirements. By using the FSEZ1317A,a charger can be implemented with few external components and minimized cost.A typical output cvicc characteristic envelope is shown in Figure 1.

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