HT7A3942 Datasheet | Holtek Semiconductor

.DataSheet.co.kr HT7A3942 High Performance Current Mode PWM Controller Feature - High performance, low cost current mode PWM controller especially designed for energy star 2.0 - High-Voltage CMOS process with excellent ESD protection (>3KV) - Very low startup current (<20μA) and operating current - ±5% trimmed oscillator for precise frequency control - Non-audible-noise Green Mode control - LEB (Leading-Edge Blanking) on CS pin - Internal slope pensation - Programmable switching frequency - Internally trimmed reference with UVLO (Under Voltage Lockout) - Cycle-by-Cycle Current Limiting - Build-in Short-Circuit-Protection(SCP) for Short-Circuit and Over-Load condition - 8-Pin SOP package General Description The HT7A3942 is a high performance, low cost Current Mode PWM controller for providing necessary feature to implement Off-Line application. By Optimizing for the Energy Star 2.0 spec., the Power Supply Unit (PSU) implemented using the HT7A3942 can satisfy the “Energy Star No-Load Mode” Stand-by Power standard, which is less than 0.3W within all Nameplate Output Power Range of 0~250W. Internally implemented circuits include a trimmed Oscillator for precise frequency control, a temperature-pensated Voltage Reference, Slope pensation, Leading-Edge Blanking, and a patented Non-Audible Noise Green Mode Control Scheme. The HT7A3942 Features a range of various protection functions such Short-Circuit Protection (SCP, which can also be used for Over-Load Protection, OLP), Cycle-by-Cycle Current Limiting and Under Voltage Lock-Out (UVLO). Applications - Switching AC-DC adaptor - Open frames switching power supply - LCD TV Application Circuits EMI Filter Flyback Converter VOUT GND Current Sense 10k RT GD CS VCC P VREF 0.1uF...