SLVSH95 July 2024 TPS546C25
ADVANCE INFORMATION
| CMD Address | 43h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | ULINEAR16, Relative, per (20h) VOUT_MODE |
| NVM Backup: | EEPROM |
| Updates: | On-the-fly |
The VOUT_UV_WARN_LIMIT command sets the value of the output voltage sensed at the (VOSNS − GOSNS) pins that causes an output voltage low warning. This value is typically less negative than the output undervoltage fault threshold.
When the sensed output voltage falls below the VOUT Tracking UVW threshold, the UVW bit in the STATUS_VOUT register is set.
Return to Supported PMBus Commands.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| R | R | R | R | R | R | RW | RW |
| Reserved | VOUT_UV_WARN_LIMIT | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VOUT_UV_WARN_LIMIT | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:10 | Reserved | R | 000000b | Not used and always set to 0. |
| 10:0 | VOUT_OV_WARN_LIMIT | R/W | NVM | Sets the undervoltage warn threshold. |
Every mantissa binary value in the writable bits is writeable and readable. However, the actual divider is set to the nearest supported value. Additionally, that mantissa value restored from EEPROM is fixed for each setting supported in hardware.
| VOUT_UV_WARN_LIMIT [10:0] | VOUT_UVW (V) | |
|---|---|---|
| Greater than or equal to | Less than | |
| 480d | 1024d | -4% |
| 464d | 480d | -8% |
| 440d | 464d | -12% |
| 416d | 440d | -16% |
| 400d | 416d | -20% |
| 384d | 400d | -24% |
| 360d | 384d | -28% |
| 360d | -32% | |