ZHCSJN4C February 2018 – February 2020 TPS2HB16-Q1
PRODUCTION DATA.
The following faults will be communicated through the SNS output:
Open-load and short-to-battery are not indicated while the switch is enabled, although these conditions can still be detected through the sense current. Hence, if there is a fault indication corresponding to an enabled channel, then it must be either due to an overcurrent or overtemperature event.
The SNS pin will only indicate the fault if the SELx pins are selecting the relevant channel. When the device is set to measure temperature, the pin will be measuring the temperature of whichever channel is at a higher temperature.
| INPUTS | OUTPUTS | |||
|---|---|---|---|---|
| DIA_EN | SEL1 | SEL2 | FAULT DETECT(1) | SNS |
| 0 | X | X | X | High-Z |
| 1 | 0 | 0 | 0 | CH1 current |
| 1 | 0 | 1 | 0 | CH2 current |
| 1 | 1 | 0 | 0 | Device temperature |
| 1 | 1 | 1 | 0 | N/A |
| 1 | 0 | 0 | 1 | ISNSFH |
| 1 | 0 | 1 | 1 | ISNSFH |
| 1 | 1 | 0 | 1 | Device temperature |
| 1 | 1 | 1 | 1 | N/A |
Version F of the device has a different fault table due to the lack of SEL1 pin functionality and the addition of the FLT1 and FLT2 pins. In all cases, SEL1 should be tied to ground for device version F. The table below shows the FLT mux for Version F of the device. The FLT1 and a FLT2 pin which will each trigger independently. If the fault detect flag corresponds to channel 1 over-current, over-temperature, or open load, FLT1 will trigger, while if the fault detect flag corresponds to channel 2 over-current, over-temperature, or open load, FLT2 will trigger.
| INPUTS | OUTPUTS | |||
|---|---|---|---|---|
| DIA_EN | SEL2 | FAULT DETECT(1) | FLTx | SNS |
| 0 | X | X | High-Z | High-Z |
| 1 | 0 | 0 | High-Z | CH1 current |
| 1 | 1 | 0 | High-Z | CH2 current |
| 1 | 0 | 1 | Open-Drain | ISNSFH |
| 1 | 1 | 1 | Open-Drain | ISNSFH |