SG6846B is a highly integrated green-mode PWM controller with features such as low startup current, low operating current, peak-current mode operation, cycle-by-cycle current limiting, burst mode at light loads, VDD over voltage protection, AC input brownout protection, etc.
The SG6846B is a highly integrated PWM controller designed for general-purpose switch-mode power supplies and flyback power converters. It features a proprietary green-mode function that continuously decreases the switching frequency under light-load conditions and enters burst mode at zero-load to minimize standby power consumption. The device incorporates peak-current mode operation with cycle-by-cycle current limiting and a two-level over-current protection (OCP) delay of 200ms.
| Low Startup Current | 8uA |
|---|---|
| Low Operating Current | 3.7mA |
| OCP Delay Time | 200ms |
| Operating Junction Temperature | -40 to +150 °C |
| Package Type | 8-Pin Small Outline Package (SOP) |
It is a highly integrated PWM controller designed for flyback converters to enhance performance and minimize standby power consumption.
Under light-load conditions, the switching frequency continuously decreases, and under zero-load conditions, the power supply enters burst mode.
The controller stops the gate immediately and latches itself (BLSY version) or restarts after the voltage charges up to 16.5V (BCSY version).