SLVSHR0 May 2025 TPS2HCS08-Q1
PRODUCTION DATA
When the channel output is enabled and the FET is on, the VOUT short-to-battery and open-load conditions can be measured with the current sense feature. In both cases, the load current is measured using the current sense circuit and the ADC (available in the ADC_RESULT_CHx_I registers). The current sense accuracy can be increased at low current levels by changing the current sense ratio from a nominal value of 5000 to a nominal lower value of 1400. This is accomplished by setting the OL_ON_EN_CHx bit to 1 in the individual CHx_CONFIG register. However, the load current must be below IENTRY_OL_ON for this bit to take effect. In addition, the voltage input to the ADC can be scaled by 8x by setting the ISNS_SCALE_CHx bit in the same CHx_CONFIG register. This enables the ADC to measure the low load current with higher accuracy.
It is recommended to only use OL_ON_EN_CHx = 1 mode and/or ISNS_SCALE_CHx = 1 with I2T disabled (I2T_EN = 0). If OL_ON_EN_CHx = 1 and/or ISNS_SCALE_CHx = 1 is used with I2T enabled (I2T_EN = 1) this could cause the channel to turn off at unintended lower I2T thresholds.