根据手册建议
Gate drive output: connect to the external MOSFET’s gate. A charge-pump driven constant current source (24 µA typical) charges the GATE pin. An internal zener clamps the GATE pin at typically 16.8 V above the OUT pin. The ΔV/Δt of the output voltage can be reduced by connecting a capacitor from the GATE pin to ground. |
在G级上加了一个对地电容,想较少电源上升的斜率,但设计回来发现,G级上有电容,后级电压就无输出。去掉G级电容,后级电压输出正常。
电容尝试过0.1U和1U的,现象依旧
Johnsin Tao:
Hi测试一下,有无电容时的驱动波形差异,同时看一下焊接的电容是否有短路?1uF肯定是大了,加0.01uF甚至更小看看?
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Johnsin Tao:
Hi测试一下,有无电容时的驱动波形差异,同时看一下焊接的电容是否有短路?1uF肯定是大了,加0.01uF甚至更小看看?