FEATURES
Linearly decreasing PWM frequency Burst-mode at light load and zero load Low start-up current (20uA) Low operating current (4mA) Internal latch circuit for OTP, OVP Leading-edge blanking Built-in synchronized slope compensation Totem pole output with soft driving Improved EMI Constant power limit over a universal AC input range Current mode operation Cycle-by-cycle current limiting Under Voltage Lockout (UVLO) Programmable PWM frequency GATE output maximum voltage clamped at 18V VDD Over Voltage Protection (OVP) Programmable Over Temperature Protection (OTP) Very few external components are required APPLICATIONS
General-purpose switch mode power supplies and flyback power converters, including: Power adapters Open-frame SMPS Battery Charger Adapter DESCRIPTION
The highly integrated SG6842 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 linearly decrease the switching frequency under light-load conditions.
System General
