Hi Expert,
I have encountered a mistake:FAULT Status Register = 0x84(charge-pump undervoltage). I don't know how to correct it and I want to know some of the possibilities that led to it.( The input voltage is 12V.)
BR,
Huan Yin
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Hi Expert,
I have encountered a mistake:FAULT Status Register = 0x84(charge-pump undervoltage). I don't know how to correct it and I want to know some of the possibilities that led to it.( The input voltage is 12V.)
BR,
Huan Yin
Hi Team,
The following is additional information regarding customer issues:
The input voltage is 12V, and the status of each register is:
Write_MainControl_State2 0x101C // LOCK = 011 , IN1/PH = 1 , IN2/PH = 0 , CLR_FLT = 0 IN1 is enabled, IN2 is not enabled
Write_IDRIVE_WDControl_State1 0x18C7 // TDEAD = 11 , WD_EN = 0 , WD_DLY = 0 , IDRIVE = 111 Dead time 960ns, watchdog turned off
Write_VDSControl_State1 0x207F // Turn off VDS current limiting
Write_ConfigControl_State1 0x2803 // Magnification = 80
The input PWM frequency is 500HZ, and the duty cycle is 50%; the power supply current limit is 2A, and the normal operating current value during the previous debugging process was about 0.2A.
Regards,
Annie
Hi Annie,
Was there any external load connected to the VCP pin? Were the capacitor values suggested used correctly?
IDRIVE = b111 is the highest gate current drive setting which is usually not required. Please refer to page-50 section 8.2.2.2 IDRIVE Configuration to calculate the required IDRIVE setting for the FETs used by the customer. Usually it should be a much lower IDRIVE setting that will not be demanding on the VCP, CP output voltage specifically required for HS-FET drive.
If the fault persists it would be useful to capture the VM voltage, VCP voltage when nFAULT going LOW with this fault. When does this fault happen? Detailed description of sequence of events that resulted with this fault will be helpful to debug. Thanks.
Regards, Murugavel