LM5175参考设计电路|同步降压-升压控制器应用电路
LM5175特性:VOUT短路保护;高效降压-升压转换;可调整开关频率;可选频率同步和抖动
LM5175典型应用范围:汽车起停系统;备用电池和超级电容充电;工业PC电源;USB功率传输;LED照明
LM5175参考设计应用电路:
图1LM5175内部结构图
The LM5175 is a wide input voltage four-switch buck-boost controller IC with integrated drivers for N-channel MOSFETs. It operates in the buck mode when VIN is greater than VOUT and in the boost mode when VIN is less than VOUT. When VIN is close to VOUT, the device operates in a proprietary transition buck or boost mode.
图2LM5175参考设计图
The LM5175 integrates four N-Channel MOSFET drivers including two low-side drivers and two high-side drivers, eliminating the need for external drivers or floating bias supplies. The internal VCC regulator supplies internal bias rails as well as the MOSFET gate drivers. The VCC regulator is powered either from the input voltage through the VIN pin or from the output or an external supply through the BIAS pin for improved efficiency. .
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