The SG6841 provides several special enhancements that satisfy the increased need for low-standby power compatible controllers with stronger protection functions. In standby mode, the PWM frequency is linearly reduced to cut power consumption, while supplying a stable output voltage.
The BiCMOS fabrication process enables reduction of the start-up current down to 30uA, and the operating current down to 3mA. The advantage of this is improved power conversion efficiency. During normal operation, it acts as a fixed frequency PWM controller. The SG6841's PWM frequency can be easily configured by changing an external resistor. Under reduced- load conditions, its patented Green-mode function will decrease the PWM frequency. This Green-mode function dramatically reduces power usage under zero-load and light-load conditions.
Proprietary Synchronized Slope Compensation ensures the stability of the current loop under continuous-mode operation. Built-in line-voltage compensation maintains a constant output power limit supporting a wide range of AC input.
The BiCMOS fabrication process enables reduction of the start-up current down to 30uA, and the operating current down to 3mA. The advantage of this is improved power conversion efficiency. During normal operation, it acts as a fixed frequency PWM controller. The SG6841's PWM frequency can be easily configured by changing an external resistor. Under reduced- load conditions, its patented Green-mode function will decrease the PWM frequency. This Green-mode function dramatically reduces power usage under zero-load and light-load conditions.
Proprietary Synchronized Slope Compensation ensures the stability of the current loop under continuous-mode operation. Built-in line-voltage compensation maintains a constant output power limit supporting a wide range of AC input.
Features
- Green-mode PWM supports the "Blue Angel" standard.
- Low startup current of 30uA; low operating current of 3mA.
- Leading-edge blanking.
- Built-in synchronized slope compensation.
- Constant output power limit.
- Cycle-by-cycle current limiting.
- Under Voltage Lockout (UVLO).
- Programmable PWM frequency.
- GATE output maximum voltage clamped at 18V.
- Totem pole output w/ soft driving for better EMI.
- Build-in limited-power control compliant with the latest safety requirements.
- Short circuit protection.
| Part No. | Pin Configuration | Package Type |
|---|---|---|
| SG6841D | 8 Pin | DIP Plastic |
| SG6841S | 8 Pin | SOP Plastic |
Main Products
Multimedia, Power Management & Control, Wireless Communication ICs, General purpose mixed-signal ICs, Scanner ICs, IP development, Manual Device Programmers, Automated Device Programming, Testing Systems