SLVSFZ4A December 2020 – February 2021 TPS929121-Q1
PRODUCTION DATA
The TPS929121-Q1 uses its internal ADC to monitor supply voltage V(SUPPLY). If the supply is below allowable working threshold, the output voltage may not be sufficient to keep the LED operating with desired brightness output as expected. The ADC output is automatically compared with threshold set by register CONF_ADCLOWSUPTH as described in Register Maps. When the supply voltage is below threshold, the device sets warning flag register FLAG_ADCLOWSUP to 1 in the status register. CLR_FAULT is able to clear the FLAG_ADCLOWSUP as well as other fault registers. In addition, the LED open-circuit and single LED short-circuit detection is disabled if the supply voltage is below threshold to avoid LED open circuit and to prevent the single LED short-circuit fault from being mis-triggered. The 4-bit register CONF_ADCLOWSUPTH has total 15 options covering from 5 V to 20 V.