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大神们请问一下这样子连接tps28225的驱动电路为什么没有输出？自举电容用了1u的，VIN用了24V驱动mos，VCC是5V，VDD是7.5V。后面的L1和C7是低通滤波。最主要是1脚UGATE和5脚LGATE没有输出，一直是0。
PWM信号有没有符合要求，有没有和芯片共地
