SG5841J

SG5841J — Highly Integrated Green-Mode PWM Controller SG5841J — Highly Integrated Green-Mode PWM Controller Features ƒ Green-Mode PWM Controller ƒ Low Startup Current : 14µA ƒ Low Operating Current: 4mA ƒ Programmable PWM Frequency with Hopping ƒ Peak-Current-Mode Control ƒ Cycle-by-Cycle Current Limiting ƒ Synchronized Slope Compensation ƒ Leading-Edge Blanking (LEB) ƒ Constant Output Power Limit ƒ Totem Pole Output with Soft Driving ƒ VDD Over-Voltage Clamping ƒ Programmable Over-Temperature Protection (OTP) ƒ Internal Open-Loop Protection ƒ VDD Under-Voltage Lockout (UVLO) ƒ GATE Output Maximum Voltage Clamp:18V Applications General-purpose, switch-mode, power supplies and flyback power converters, including: ƒ Power Adapters ƒ Open-Frame SMPS Description The highly integrated SG5841/J series of PWM controllers provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency at lightload conditions. This green-mode function enables the power supply to meet international power conservation requirements. To further reduce power consumption, SG5841/J is manufactured using the BiCMOS process. This allows a low startup current, around 14µA, and an operating current of only 4mA. As a result, a large startup resistance can be used. The built-in synchronized slope compensation achieves stable peak-current-mode control....