[原创] TI TPS63802高效2A大电流降压－升压转换器解决方案

TI公司的TPS63802高效大电流降压-升压转换器,其输入电压可高于,等于或低于输出电压.输出电流在很宽电压范围内高达2A.器件在升压模式峰值电流在4.5A,在降压模式为3.5A,输出电压可编程调整.能根据输入电压自动从降压变换到升压模式,当输入电压大约等于输出电压时器件维持3个周期的降压-升压模式.输入电压范围1.3V-5.5V,输出电压范围1.8V-5V(可调整).主要用在系统预稳压(智能手机,平板电脑,EFT终端和远程通信系统),点负载稳压(有线传感器,端口/线缆适配器和加密狗),指纹,面部ID,照相机传感器(智能手机,电子智能锁,IP网络照相机),RF放大器电源(智能传感器),热电设备(TCE/TEM)电源(数据通信,关模块,制冷/加热).本文介绍了TPS63802主要特性,功能框图和应用电路,以及评估模块TPS63802EVM主要特性,电路图,材料清单和PCB设计图.

The TPS63802 is a high efficiency, high outputcurrent buck-boost converter. It is used when theinput voltage is higher, equal, or lower than the outputvoltage. Output currents up to 2 A are supported overa wide voltage range. The device limits the peakcurrent at 4.5 A in Boost-Mode and 3.5 A in Buck-Mode. The device is adjusted to the programmed output voltage. It automatically changes from buck toboost operation based on the input voltage. Itremains in a 3-cycle buck-boost mode when the inputvoltage is approximately equal to the output voltage.

The transitions happen seamlessly and avoidsunwanted toggling within the modes. The TPS63802comes in a 2 mm x 3 mm package. The device workswith tiny passive components to keep the overallsolution size small.

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