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由美国功率集成公司(POWER Integration Inc)开发的TOP Switch 系列新型智能集成芯片内含自启动电路、功率开关管、PWM 控制电路及保护电路等。1.TOP249Y 引脚功能和内部结构①TOP249Y 的引脚功能TOP249Y 采用 TO-220-7C 封装形式,共六个引脚.第①脚为控制端 C,第②脚为检测端 L、第③脚为电源设定端 X、第④脚为内部 MOSFET 原极 S、第⑤脚为开关频率选择端 F、第⑥脚为内部 MOSFET 漏极 D。各引脚的具体功能如下。
The TOP Switch family of new intelligent integrated chips developed by POWER Integration Inc includes a self-starting circuit, a power switch, a PWM control circuit and a protection circuit. 1.TOP249Y pin function and internal structure ① TOP249Y pin function TOP249Y TO-220-7C package, a total of six pins. The first pin for the control terminal C, the first two feet for the detection of L, the third pin The power setting end X, the fourth pin is the internal MOSFET original S, the fifth pin is the switching frequency selection F, the sixth pin is the internal MOSFET drain D. The specific function of each pin is as follows.