SG6742ML/MR is a highly integrated green-mode PWM controller with features including high-voltage startup, low operating current, linearly decreasing PWM frequency, frequency hopping to reduce EMI emission, fixed PWM frequency, peak-current-mode control, etc.
The SG6742ML/MR is a highly integrated PWM controller designed to enhance the performance of flyback power converters. It features proprietary green-mode functionality that linearly decreases switching frequency at light loads to minimize standby power consumption, while maintaining a minimum frequency above 22kHz to avoid acoustic noise.
The device includes several protection mechanisms such as cycle-by-cycle current limiting, internal open-loop protection, and over-temperature protection with an internal latch circuit. It is available in an 8-pin SOP package and operates across a wide AC input voltage range from 90Vac to 264Vac.
| Operating Supply Current | 2.7mA |
|---|---|
| Minimum PWM Frequency (Green-Mode) | 22KHz |
| Fixed PWM Frequency | 65KHz |
| Gate Output Maximum Voltage Clamp | 18V |
| Operating Junction Temperature Range | -40 to +125 °C |
| Package Type | 8-pin SOP |
The device has a low operating current of 2.7mA.
It integrates a frequency-hopping function that helps reduce EMI emission, especially with minimum line filters.
The controller ensures constant output power over an AC input voltage range from 90Vac to 264Vac.