ZHCSQY3 march 2023 TPS546D24S
PRODUCTION DATA
| CMD Address | 4Fh |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11 per CAPABILITY |
| Phased: | Yes |
| NVM Back-up: | EEPROM |
| Updates: | On-the-fly |
The OT_FAULT_LIMIT command sets the value of the temperature limit, in degrees Celsius, that causes an overtemperature fault condition.
The converter response to an overtemperature event is described in OT_FAULT_RESPONSE.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| OTF_EXP | OTF_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| OTF_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:11 | OTF_ EXP | RW | 00000b | Linear format two’s complement exponent |
| 10:0 | OTF_ MAN | RW | NVM | Linear format two’s complement mantissa. Refer to the following text. |
Attempts to write (4Fh) OT_FAULT_LIMIT to any value outside those specified as valid will be considered invalid/unsupported data and cause the TPS546D24S 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.
Command Resolution and NVM Store/Restore Behavior
The (4Fh) OT_FAULT_LIMIT command is implemented using the TPS546D24S internal telemetry system. As a result, the value of this command can be programmed with very high resolution using the linear format. However, the TPS546D24S provides only limited NVM-backed options for this command. Following a power-cycle or NVM Store/Restore operation, the value will be restored to the nearest NVM supported value. The NVM supports values from 0°C to 160°C in 1°C steps. Programming a value of 255°C will disable Programmable Overtemperature Fault Limit without disabling the on-die Bandgap thermal shutdown.