Description

The STRF6238S is an IC chip belonging to the series STR-F6600. It is designed to meet the increasing demand for integration and reliability of off-line quasi-resonant flyback converters. It integrates a primary control and drive circuit with discrete avalanche-rated power MOSFETs. The device can handle a 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. It is widely used in battery chargers, set-top boxes, televisions, monitors, and industrial power supply units.

Specifications and features

The key features of the STRF6238S IC chip are:

• 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

Application Scenarios

The STRF6238S is ideal for use in a variety of applications, including but not limited to:

• Battery chargers
• Set-top boxes
• Televisions
• Monitors
• Industrial power supply units

Comparison

• Low power dissipation and EMI
• Rugged and reliable design
• Wide range of power handling capabilities
• Full over-current protection with no blanking

• The device may not be suitable for applications requiring more than 300 watts for 100/115/230 VAC inputs or more than 150 watts for 85 to 265 VAC universal input.
• The overmolded 5-pin package may not be suitable for all applications.