STR-G8626_STR-G5653_STR-F6654 _ POWER SWITCHING REGULATORS _ DETAILS

     The Series STR-G 8626/5653/F6654 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters. The series incorporates a high-precise error amplifying control and drive circuit with discrete avalanche-rated power MOSFET, featuring fewer external components, small-size and standard power supply.  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.  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 SIP 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
• Soft drive circuit MOSFET
• Adjustable MOSFET switching speed
• 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 (100 Amax)
• Low-Frequency, Low-Power Standby Operation
• Overmolded 5-Pin Package

CIRCUIT BLOCK DIAGRAM

PIN CONFUGURATION [STR-G5653 _ G-8626]

Pin number	Symbol	Function Description
1	D	MOSFET drain
2	S	MOSFET source
3	GROUND	GROUND
4	Vin	Supply voltage input for control circuit
5	OCP/FB	Over-current protection detection signal/ voltage-limiting signal input

PIN CONFUGURATION [STR-F6654]

Pin number	Symbol	Function Description
1	OCP/FB	Over-current protection detection signal/ voltage-limiting signal input
2	S	MOSFET source
3	D	MOSFET drain
4	Vin	Supply voltage input for control circuit
5	GROUND	GROUND