The Series STR-F6600 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters. The series incorporates a primary control and drive circuit with discrete avalanche-rated power MOSFETs.

Covering the power range from below 25 watts up to 300 watts for 100/115/230 VAC inputs, and up to 150 watts for 85 to 265 VAC universal input, these devices can be used in a range of applications, from battery chargers and set top boxes, to televisions, monitors, and industrial power supply units.

Cycle-by-cycle current limiting, under-voltage lockout with hysteresis, over-voltage protection, and thermal shutdown protects the power supply during the normal overload and fault conditions. Over-voltage protection and thermal shutdown are latched after a short delay. The latch may be reset by cycling the input supply. Low-current startup and a low-power standby mode selected from the secondary circuit completes a comprehensive suite of features. The series is provided in a five-pin overmolded TO-3P style package, affording dielectric isolation without compromising thermal characteristics.

FEATURES

■ Flyback Operation with Quasi-Resonant Soft Switching

for Low Power Dissipation and EMI

■ Rugged Avalanche-Rated MOSFET

■ Choice of MOSFET Voltage and rDS(on)

■ Full Over-Current Protection (no blanking)

■ Under-Voltage Lockout with Hysteresis

■ Over-Voltage Protection

■ Direct Voltage Feedback

■ Low Start-up Current (<400 µA)

■ Low-Frequency, Low-Power Standby Operation

■ Overmolded 5-Pin Package