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电路设计->电源电路图->其他电源电路图->LM5175参考设计电路|同步降压-升压控制器应用电路

LM5175参考设计电路|同步降压-升压控制器应用电路

作者:沉默的offer时间:2018-07-31

LM5175四开关同步降压-升压控制器能够对等于、高于或低于输入电压的输出电压进行调节。此篇主要介绍了LM5175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。

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. .

LM5175中文数据手册:点击下载

更多原理图及源代码热门应用电路:立刻点击


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