JAJSH97A April 2019 – September 2019 TPS3840-Q1
PRODUCTION DATA.
The initial power stage in automotive applications starts with the 12 V battery. Variation of the battery voltage is common between 9 V and 16 V. Furthermore, If cold-cranking and load dump conditions are considered, voltage transients can occur as low as 3 V and as high as 42V. In this design example, we are highlighting the ability for low power , direct off-battery voltage supervision. Figure 49 illustrates an example of how the TPS3840-Q1 is monitoring the battery voltage while being powered by it as well. For more information, read this application report on how to achieve nano-amp IQ voltage supervision in automotive, wide-vin applications.