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[原创]TI LM604x0系列36V 4A超小型同步降压转换器解决方案

关键词:电源管理 DC/DC转换器 TI LM604x0

时间:2020-10-16 11:23:48       来源:中电网

TI公司的LM604x0系列是3.8V-36V 3A和4A超小型同步降压DC/DC转换器.该器件容易使用,为工业应用提供业界最好的效率.LM60430提供多达3A负载电流,而LM60440则是业界最小的4A降压转换器.器件具有低EMI和开关噪音,满足CISPR22 class 5标准,开关频率400kHz和1MHz,输出电压从1V到24V,所有负载下的功率转换高效率,峰值效率大于95%,10-mA, 12 VIN, 5 VOUT时的PFM效率为90%.工作结温–40C 到 +150C.工作静态电流25 μA.主要用在工业PC和CPU(PLC控制器),伺服驱动和AC驱动控制模块和医疗与仪表应用.本文介绍了LM604x0系列主要特性,功能框图,应用电路以及评估模块LM60440AQEVM主要特性,电路图,材料清单和PCB设计图.

 

The LM604x0 regulator is an easy-to-use,synchronous, step-down DC/DC converter that

delivers best-in-class efficiency for rugged industrialapplications. The LM60430 drives up to 3-A of loadcurrent, and the LM60440 is industrys smallest 4Astep-down converter.

The LM604x0 is available in an ultra-miniature WQFNpackage with wettable flanks and a standard QFNpin-out with a thermal pad to enhance thermalperformance. This enhanced QFN package featuresextremely small parasitic inductance and resistance,

enabling very high efficiency while minimizing switchnode ringing and dramatically reducing EMI.

The LM604x0 uses peak-current-mode control toautomatically fold back frequency at light load toensure exceptional efficiency across the entire loadrange. The low power dissip..

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