FSEZ1216

FSEZ1216 — Primary-Side-Regulation PWM Integrated Power MOSFET April 2009 FSEZ1216 — Primary-Side-Regulation PWM Integrated Power MOSFET Features ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry Green Mode: Frequency Reduction at Light-Load Fixed PWM Frequency at 42kHz with Frequency Hopping to Reduce EMI Cable Voltage Drop Compensation in CV Mode Low Startup Current: 10μA Low Operating Current: 3.5mA 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 18V Fixed Over-Temperature Protection with Latch DIP-8 Package Available Description The primary-side PWM integrated Power MOSFET, FSEZ1216, significantly simplifies power supply design that requires CV and CC regulation capabilities. FSEZ1216 controls the output voltage and current precisely only with the information in the primary side of the power supply, not only removing the output current sensing loss, but also eliminating all secondary feedback circuitry. The green-mode function with a low startup current (10µA) maximizes the light load efficiency so the power supply can meet stringent standby power regulations. Compared with conventional secondary side regulation approach, the FSEZ1216 can reduce total cost, component count, size, and weight, while simultaneously increasing efficiency, productivity, and system relia...