TIDM-1000: VIENNA_V_MAX_SENSE_VOLTS

Steven MacDonald1

Prodigy 200 points

Part Number: TIDM-1000

Hello, Can you tell me what VIENNA_V_MAX_SENSE_VOLTS is? I am having trouble getting my bus voltage to be 800Vdc

Thanks

Steve

over 5 years ago

0 Chen Jiang ti over 5 years ago

TI__Genius 15935 points

Hi Steve,

VIENNA_V_MAX_SENSE_VOLTS is the max sense voltage in this reference design. This is also used to do per unit calculation. You have to setup the parameter below through main.syscfg if you are using the latest reference code in digital power sdk.

#define VIENNA_VBUS_REF_SET_VOLTS ((float32_t)600)

Note that the Max voltage the design was tested upto was 800V with 230 Vrms /400 VL-L input. So you have to be careful about the DC output.

Regards,

Chen

0 Steven MacDonald1 over 5 years ago in reply to Chen Jiang ti

Prodigy 200 points

Hi Chen

But in the reference design wasn't the values:

#define VIENNA_VAC_MAX_SENSE_VOLTS ((float32_t)454)
#define VIENNA_VDCBUS_MAX_SENSE_VOLTS ((float32_t)xxx??) can't recall
#define VIENNA_V_MAX_SENSE_VOLTS ((float32_t)454)

// is VIENNA_V_MAX_SENSE_VOLTS 1/2 the pfc bus max???

VIENNA_VBUS_REF_SET_VOLTS ((float32_t)600)

0 Chen Jiang ti over 5 years ago in reply to Steven MacDonald1

TI__Genius 15935 points

Hi Steve,

You could refer to the calculation.xlsx inside solution folder for details. Also the thread below should also help.

The bus voltage is sensed separately(VbusPM and Vbus MN).

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/813190?TIDM-1000-What-does-ADC-PU-SCALE-FACTOR-represent-

C2000™︎ microcontrollers

C2000 microcontrollers forum

TIDM-1000: VIENNA_V_MAX_SENSE_VOLTS