基于 同步降压转换器设计开关电源

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中图分类号： 文献标识码： 文章编号：1003-8639（2025）05-0101-03

【Abstract】Because the traditional asynchronous voltageconverter has low efficiencyand high thermal load，the higher priceof synchronous voltage converter ismore favored in many electronic products.Synchronous voltagereduction converterasa form of eficient Buck switch power in switching power design has greater development prospects，this paper discusses the L6983CQTR in DC-DCconverter has broader input voltage range and the highest upto 3 aoutput curent，thelightloadconditionscan maintain higheficiency，andthechip internal integrated high sideand low side MOSFET switch，can savea lot of external components，the design is more simple and practical.This article mainly introduces thepin role of L6983CQTR，analyzes how to use thechip to PWM signal and Buck DC-DC circuit， discuses how to simplyuse ST eDesignSuite to design the switch power supply，and selects the appropriate external components through calculation.

【Key words】 L6983CQTR；PWM；Buck type DC-DC conversion circuit；selection of external components

0 引言

对于现代电子设备，直流电源的稳定性、小型化越来越重要，通过高集成电路 芯片外搭少数元器件实现电压转换功能得到了广泛的关注。（剩余3601字）