Hello Phil,
Thank you for the advice. I believe removing R1000 removed the fault. Now nFAULT is high (good!). Now in between the bridges is approximately 10V.
However when I try to drive the MOSFETs by applying 3.3V from the microcontroller to both the R1006 (INHB) and R1008 (INHC). Only GH_B responds based on INHB input and I recieve no reaction from GH_C based on INHC.
HW implementation:
EN_Gate: 3.3V
nFAULT: 3.3V
PWRGD: 3.3V
SW Implementation: I made sure to program via SPI 6 channel control via the Gate Drive Control register.
uint16 HS_Control=0x2D56;//HS Gate Driver Control Address = 0x5
uint16 LS_Control=0x3556;//LS Gate Driver Control Address = 0x6
uint16 Gate_Drive_Control=0x3C72;//Gate Drive Control Address = 0x7
uint16 IC_Control=0x4C99;//IC Operation Control Address = 0x9
uint16 Shunt_Amplifier_Control=0x52A0;//Shunt Amplifier Control Address = 0xA
uint16 Voltage_Reg_Control=0x5802;//Voltage Regulator Control Address = 0xB
uint16 VDS_Sense_Control=0x80A0;//VDS Sense Control Address = 0xC
Regards,
Robert Liu