SLVSHR0 May 2025 TPS2HCS08-Q1
PRODUCTION DATA
The TPS2HCS08-Q1 provides a VBB voltage measurement through the 10-bit ADC.
The VBB voltage measurement is disabled by default. The VBB voltage sense function can be enabled through the ADC_VBB_DIS bit in the ADC_CONFIG register.
The conversion equation for the VBB voltage measurement is detailed in Equation 13. The ADC measurement result will be available in the ADC_RESULT_VBB register. The VBB_RDY bit is set to 1 if a new ADC conversion result exists since the register was last read. If any of the channels are in the I2T loop (I2T_MOD_CHx = 1), the VBB voltage measurement, if enabled, will be disabled and the VBB_RDY bit will be 0. Once the channel(s) exit the I2T loop (I2T_MOD_CHx = 0), then the VBB voltage measurement will be automatically re-enabled if previously enabled before the I2T event.
The VBB voltage measurement is referenced to the device ground so if there is a ground network used for reverse battery then there can be an offset in the voltage measurement.