JAJSP25 November 2023 TPS546A24S
PRODUCTION DATA
| CMD Address | 61h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11 per CAPABILITY |
| Phased: | No |
| NVM Back-up: | EEPROM or Pin Detection |
| Updates: | On-the-fly |
The TON_RISE command sets the time, in milliseconds, from when the output starts to rise until the voltage has entered the regulation band. This effectively sets the slew rate of the reference DAC during the soft-start period. Note that the rise time is equal to TON_RISE regardless of the value of the target output voltage or VOUT_SCALE_LOOP.
Due to hardware limitations in the resolution of the reference DAC slew-rate control, longer TON_RISE times with higher VOUT_COMMAND voltages can result in some quantization error in the programmed TON_RISE times with several TON_RISE times producing the same VOUT slope and TON_RISE time even with different TON_RISE settings or different TON_RISE times for the same TON_RISE setting and different VOUT_COMMAND voltages.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| TONR_EXP | TONR_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| TONR_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:11 | TONR_ EXP | RW | 11110b | Linear format two’s complement exponent |
| 10:0 | TONR_ MAN | RW | NVM | Linear format two’s complement mantissa |
Attempts to write (61h) TON_RISE beyond the supported range 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. TON_RISE will support the range from 0ms to 31.75 ms in 0.25-ms steps. Values less than 0.5 ms are supported as 0.5 ms.