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【原创】+一款带有USB接口的LED触摸台灯

Other Parts Discussed in Thread: MSP430G2252, LM3414, TPS5405

 

先讲一下该LED台灯规格:

输入:24V,1A适配器。

输出:1路LED,18V,0.4A;另一路给USB设备充电用,5V,2A。

其它:采用电容式触摸按键,带有调光功能;按键下有一个小指示灯。

以下全部采用TI的MCU和电源IC方案来实施:

电容式触摸:采用msp430g2252实现。

LED恒流电路:采用LM3414实现24V到18V的DC-DC转换。

USB充电:采用TPS5405实现5V,2A输出。

调光功能:msp430g2252输出一路PWM,实现100%,50%,0的调光功能。

 

TI台灯.pdf