ZHCSON0A August 2022 – September 2023 TPSM8D6B24
PRODUCTION DATA
| CMD Address | 55h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11 per CAPABILITY |
| Phased: | No |
| NVM Backup: | EEPROM |
| Updates: | On-the-fly |
The (55h) VIN_OV_FAULT_LIMIT command sets the PVIN voltage, in volts, when a VIN_OV_FAULT is declared. The response to a detected VIN_OV_FAULT is determined by the settings of (56h) VIN_OV_FAULT_RESPONSE. (55h) VIN_OV_FAULT_LIMIT is typically used to stop switching in the event of excessive input voltage, which can result in over-stress damage to the power FETs due to ringing on the SW node.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VINOVF_EXP | VINOVF_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VINOVF_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:11 | VINOVF_ EXP | RW | 11110b | Linear format two’s complement exponent |
| 10:0 | VINOVF_ MAN | RW | NVM | Linear format two’s complement mantissa |
Attempts to write (55h) VIN_OV_FAULT_LIMIT beyond the supported range are considered invalid or unsupported data and cause the TPSM8D6B24 to respond by flagging the appropriate status bits and notifying the host according to the PMBus 1.3.1 Part II specification section 10.9.3. (55h) VIN_OV_FAULT_LIMIT supports values from 4 V to 20 V in 0.25-V steps. Following a power cycle or STORE/RESTORE, (55h) VIN_OV_FAULT_LIMIT is restored to the nearest supported value.