ZHCSQY3 march 2023 TPS546D24S
PRODUCTION DATA
| CMD Address | 36h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11, per CAPABILITY |
| Phased: | No |
| NVM Back-up: | EEPROM |
| Updates: | On-the-fly |
(36h) VIN_OFF command sets the value of the PVIN input voltage, in Volts, at which the unit must stop power conversion. If the Power Conversion Enable conditions as defined by (02h) ON_OFF_CONFIG are met and PVIN is less than (36h) VIN_OFF, the output off due to low VIN bit in (7Ch) STATUS_INPUT is set.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | R | RW | RW | RW |
| VOFF_EXP | VOFF_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VOFF_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:11 | VOFF_ EXP | RW | 11110b | Linear format two’s complement exponent |
| 10:0 | VOFF_ MAN | RW | NVM | Linear format two’s complement mantissa. Refer to the following text. |
Attempts to write (36h) VIN_OFF 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
(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 restoration from NVM during Power-On Reset or (16h) RESTORE_USER_ALL. (36h) VIN_OFF hardware supports all values from 2.25 V to 18.25 in 0.25-V steps.
While it is possible to set (36h) VIN_OFF equal to or greater than (35h) VIN_ON, it is not advisable and can produce rapid enabling and disabling of conversion and undesirable operation.