FLS6617

FLS6617 Primary-Side Regulation PWM with Power MOSFET Integrated 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 TRUECURRENT® technology of FLS6617 enables precise CC regulation and simplified circuit design for battery−charger applications leading to lower−cost, smaller, and lighter chargers, compared 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 FLS6617, a charger can be implemented with few external components and minimized cost. A typical output CV/CC characteristic envelope is shown in Figure 1. Features Low Standby Power under 30 mW High−Voltage Startup Fewest External Component Counts Constant−Voltage (CV) and Constant−Current (CC) Control without Secondary−Feedback Circuitry Green−Mode: Linearly Decreasing PWM Frequency with Cycle Skipping Fixed PWM Frequency at 50 kHz with Proprietary Frequency Hopping to Solve EMI Problem 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 15 V Fixed Over−Temperature Prot...