ZHCSR16 September 2022 TPS544C26
ADVANCE INFORMATION
| CMD Address | 65h |
| Write Transaction: | Write Byte |
| Read Transaction: | Read Byte |
| Format: | Unsigned Binary (1 byte) |
| NVM Backup: | EEPROM |
| Updates: | On-the-fly |
The TOFF_FALL command sets the time, in milliseconds, from the end of the turn-off delay time until the reference DAC is commanded to 0 mV. This command is used with the TPS544C26 device whose output can sink enough current to cause the output voltage to decrease at a controlled rate, which effectively sets the slew rate of the reference DAC during the soft-off period. The VOUT fall time is actually not equal to TOFF_FALL value since the device stops SW switching once the output voltage is discharged to 200 mV, and the fall time is more for setting the reference DAC slew rate. See Shutdown and Table 7-8 for more details.
Return to Supported I2C and Default Values.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| R | R | R | R | R | R | R/W | R/W |
| Reserved | TOFF_FALL | ||||||
| LEGEND: R/W = Read/Write; R = Read only |
|
Bit |
Field |
Access |
Reset |
Description |
|---|---|---|---|---|
| 7:2 | Reserved | R | 000000b | Not used and always set to 0. |
|
1:0 |
TOFF_FALL |
R/W |
NVM | These bits select the soft-stop time option before disabling the SW
switching and tri-state the power FETs. 00b: TOFF_FALL time = 0.5 ms 01b: TOFF_FALL time = 1 ms 10b: TOFF_FALL time = 2 ms 11b: TOFF_FALL time = 4 ms |