JAJSP25 November 2023 TPS546A24S
PRODUCTION DATA
| CMD Address | 35h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11, per CAPABILITY |
| Phased: | No |
| NVM Back-up: | EEPROM |
| Updates: | On-the-fly |
VIN_ON command sets the value of the input voltage, in Volts, at which the unit must start power conversion.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VON_EXP | VON_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VON_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
15:11 | VON_ EXP | RW | 11110b | Linear format two’s complement exponent, -2 |
10:0 | VON_ MAN | RW | NVM | Linear format two’s complement mantissa. Refer to the following text for more information. |
Attempts to write (35h) VIN_ON to any value outside those specified as valid will be considered invalid/unsupported data and cause the TPS546A24S 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
(35h) VIN_ON and (36h) VIN_OFF have limited hardware range and resolution as well as limited NVM allocation. While the command will accept any binary value within the valid range, values not exactly represented by the hardware resolution will be rounded down to the next lower supported threshold for implementation or upon restore from NVM during Power-On Reset or (16h) RESTORE_USER_ALL. (35h) VIN_ON hardware supports all values from 2.50 V to 15.75 V in 0.25-V steps.
Note that the LOW_VIN fault condition is masked until the sensed input voltage exceeds the VIN_ON threshold for the first time following a power-on reset. Control/Enable pin toggles and EEPROM store/restore operations do not reset this masking.