The SG6741 is a highly integrated green-mode PWM controller with features including high-voltage startup, low operating current, linearly decreasing PWM frequency, reduced EMI emission, peak-current-mode control, etc.
The Fairchild SG6741 is a highly integrated PWM controller designed to enhance the performance of flyback power converters. Key features include a proprietary green-mode function that linearly decreases switching frequency at light loads to meet international power conservation requirements, while maintaining a minimum frequency above 22kHz to avoid acoustic noise. The device utilizes BiCMOS technology for an operating current as low as 4mA and includes internal high-voltage startup circuitry.
| Operating Supply Current (Typical) | 4mA |
|---|---|
| Minimum PWM Frequency | 22kHz |
| Gate Output Maximum Voltage Clamp | 18V |
| Operating Junction Temperature Range | -40 to +125 °C |
The device features a low operating current of only 4mA.
Yes, it provides an internal open-loop protection circuit to ensure safety during such failures.