Formula for Over voltage protection threshold for STSPIN32G4?

[Garey]

Hi, Why is DAC_OVP_Threshold = 23830 ?  
@GMA  Thx :)

[GMA]

Hello @Garey,

As displayed on the Workbench interface, VBUS is not compared to a DAC-generated value using an internal comparator, as is the case for Over current protection on Current Sensing. Instead, the comparison is performed by firmware.

The DAC_OVP_THRESHOLD parameter is set to a default value.

[Garey]

Hi @GMA ，Thanks for your reply ：）

Are you saying that 'DAC_OVP_Threshold = 23830' actually has no effect?

[GMA]

Hello @Garey,

The overvoltage protection is managed by the firmware in the r_divider_bus_voltage_sensor.c file.
The overvoltage protection with DAC comparison feature is not available.

[Garey]

Hi @GMA ,

But (DAC_OVP_Threshold = 23830) was generated by the MCSDK tool.

I see there is related initialization configuration for DAC_OVP_Threshold,

combined with your reply, which means DAC_OVP_Threshold actually doesn't take effect, right?

[GMA · Accepted solution]

Hello @Garey,

DAC_OVP_Threshold is defined but not used.
Bus Voltage sensor thresholds are defined in drive_parameters.h file

/**************************    FIRMWARE PROTECTIONS SECTION   *****************/
#define OV_VOLTAGE_THRESHOLD_V              29 /*!< Over-voltage threshold */
#define UD_VOLTAGE_THRESHOLD_V              10 /*!< Under-voltage threshold */