SG6105 is a integrated circuit produced by System General Corporation. It is a controller for switching power supply, which can realize monitoring and control of power supply output, and has remote switch, power good circuit, overvoltage protection and over-power protection functions.
The SG6105 is a controller designed for switching mode power supplies in desktop PCs, such as ATX, NLX, and SFX. It provides comprehensive monitoring and control functions, including over-voltage and under-voltage protection for 3.3V, 5V, 12V, and negative rails, as well as over-power and short-circuit protection. The device features a high level of integration with few external components, utilizing on-chip oscillators, error amplifiers, and two precision shunt regulators for 3.3V and 5V standby regulation.
| Supply Voltage (VCC) | 4.5V to 5.5V |
|---|---|
| Operating Ambient Temperature | -25 to +85°C |
| PWM Frequency | 60 to 70 kHz |
| Soft-Start Charge Current | 6 to 9.3 uA |
| Power Good Delay | 200 to 400 ms |
| Maximum Duty Cycle | 93% |
The PSON pin is a logic input for remote On/Off control, enabling or disabling the PWM output after a specific delay.
The UVAC pin detects main AC voltage under-voltage and/or failure to trigger protection.
The OPP pin is an analog input for over-power sense, connected to a driver transformer or current transformer output.