飞控短路了，BEC部分不工作。
可能是通电瞬间，有短路，导致BEC回路烧毁，但测量电感，电容特性正常，TPS54302表面无异常，估计是线路烧毁，USB供电STM32工作正常，说明3.3V部分正常，TPS54302输出和5V端子通路无异常，其FB回路，boot引脚都正常，再说两个BEC回路同时烧毁概率很小，遂查公共部分，输入引脚有电压，唯独GND和电池-不通，测量S1 S2的GND之间不通，必然是不对的，于是怀疑短路瞬间GND间线路烧毁，跨接一根黑线，搞定。抢救回来140元钱。http://image.rcfans.com/pic/20240818/1723942060414353_687.jpg?x-oss-process=image/watermark,image_cGljLzIwMjExMDA2L29zc18xNjMzNTM0ODIxOTgzXzg2NF81MzNfNTYucG5n,t_50,g_se,x_20,y_20
http://image.rcfans.com/pic/20240818/1723942060419211_439.jpg?x-oss-process=image/watermark,image_cGljLzIwMjExMDA2L29zc18xNjMzNTM0ODIxOTgzXzg2NF81MzNfNTYucG5n,t_50,g_se,x_20,y_20
http://image.rcfans.com/pic/20240818/1723942060420856_132.jpg?x-oss-process=image/watermark,image_cGljLzIwMjExMDA2L29zc18xNjMzNTM0ODIxOTgzXzg2NF81MzNfNTYucG5n,t_50,g_se,x_20,y_20
http://image.rcfans.com/pic/20240818/1723942060420786_36.jpg?x-oss-process=image/watermark,image_cGljLzIwMjExMDA2L29zc18xNjMzNTM0ODIxOTgzXzg2NF81MzNfNTYucG5n,t_50,g_se,x_20,y_20
页:
[1]