ZHCSNL3A December 2021 – November 2023 TPSM8D6C24
PRODUCTION DATA
| CMD Address | 62h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11 per CAPABILITY |
| Phased: | No |
| NVM Backup: | EEPROM |
| Updates: | On-the-fly |
The TON_MAX_FAULT_LIMIT command sets an upper limit, in milliseconds, on how long the unit can attempt to power up the output without reaching the target voltage.
The TON_MAX time is defined as the maximum allowable amount of time from the end of TON_DELAY, until the output voltage reaches 85% of the programmed output voltage, as sensed by the READ_VOUT telemetry at VOSNS – GOSNS.
The TPSM8D6C24 undervoltage fault limit is enabled at the end of TON_RISE. As a consequence, unless VOUT_UV_FAULT_RESPONSE is set to ignore, in the case of a “real” TON_MAX fault (for example, output voltage did not rise quickly enough), UV faults and the associated response always precede TON_MAX.
The converter response to a TON_MAX fault event is described in TON_MAX_FAULT_RESPONSE.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| TONMAXF_EXP | TONMAXF_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| TONMAXF_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:11 | TONMAXF_ EXP | RW | 11111b | Linear format two’s complement exponent |
| 10:0 | TONMAXF_ MAN | RW | NVM | Linear format two’s complement mantissa |
Attempts to write (62h) TON_MAX_FAULT_LIMIT are considered an invalid or unsupported command and cause the TPSM8D6C24 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_MAX_FAULT_LIMIT supports values from 0 ms to 127 ms in 0.5-ms steps.
*Note: programming TON_MAX_FAULT to 0 ms disables the TON_MAX functionality.