电路图跟评估板一致,阻性负载开机时,通过调节MOSFET的GATE对GND的电容,使7A负载时可以正常开机。
但在容性负载下(电子负载CC模式下),负载电流0.2A时,开机起不来,MOSFET开机一直振荡,估计是保护了。
想问下:
1. 在容性负载情况下,哪些参数可以调试使电路正常开机?
2. 评估板有调试过容性负载(电子负载恒流模式CC)开机的情况吗?
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Hi
容性负载应该会造成过载。
没有做过容性的测试,因为这个芯片一般都是用于阻性负载。
RESTART AFTER OVER-CURRENT FAULT EVENT
When a VDS fault condition has occurred and the TIMER pinvoltage has reached 2V, the LM5060 latches off the externalMOSFET. In order to initiate a restart, either the EN pin, theVINpin, or the UVLO pin must be toggled low and then high.
过流保护后重新启动,需要EN、VIN或UVLO管脚先触发低,然后再触发高。
其中VIN、UVLO都有一个阈值,比较好理解,EN有高和低两个阈值,触发低和触发高是否分别对应低和高的阈值?
能否对上面故障后的恢复条件具体说明下?