PM8841参考设计电路|低侧栅极驱动器应用电路

PM8841低侧栅极驱动器，是一款高频率单通道低侧MOSFET驱动器，专门搭配数字式功率转换微控制器使用.此篇主要介绍了PM8841特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

PM8841特性：低侧MOSFET驱动器1A的灌电流和0.8A的拉电流；针对输入阈值的外部基准；电源电压范围宽（10V至18V）；输入和输出下拉电阻器；传播延迟短

PM8841典型应用范围：SMPS；数字光源；无线电池充电器；数控MOSFET

PM8841参考设计应用电路：

图1PM8841内部结构框图

PM8841 is a high frequency single channel low-side MOSFET driver specifically designed to work with digital power conversion microcontrollers, such as the STMicroelectronics STLUX™ family of products.

图2PM8841参考设计图

The PM8841 driver is intended to drive power MOSFETs used in power conversion topologies at high speed. The accurate supply voltage definition guarantees an effective driving in every condition. The voltage present at the IN_TH pin is used for the threshold definition. It could be the same voltage used to supply the device providing the signal applied to the IN pin, or it can be derived by the VCC pin, eventually using a voltage divider.It is mainly suggested to provide IN_TH voltage starting from VCC voltage.

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