台湾合泰HT7A3942原装正品转换芯片IC

HT7A3942 -- High Performance Current Mode PWM Controller

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-compensated Voltage Reference, Slope Compensation, 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).

The HT7A3942 is fully pin-to-pin compatible with the UC3842. Features High Performance, Low Cost Current Mode PWM Controller especially designed for Energy Star 2.0 Fully Pin-to-Pin Compatible with UC3842 High-Voltage CMOS Process with Excellent ESD protection (>3KV) Very Low Startup Current (