JAJSFL9C July 2016 – June 2018 TPS546C20A
PRODUCTION DATA.
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The TON_MAX_FAULT_LIMIT command sets an UPPER limt in milliseconds, on how long the unit can attempt to power up the output without reaching the output undervoltage fault limit. The time begins counting as soon as the device enters the soft-start state begins to ramp the output. In other words, the TON_MAX_FAULT_LIMIT timer starts at the beginning of the TON_RISE state.
For loop slave device, this command cannot be accessed. Any writes to this command will be ignored. An attempt to read or write this command will result in a NACK’d command, the reporting of an IVC fault, and triggering of SMB_ALERT.
When TON_MAX_FAULT_LIMIT is set to 0, the TON_MAX_FAULT timer is disabled, which means that there is no limit and that the unit can attempt to bring up the output voltage indefinitely.
The device does not prohibit setting TON_MAX_FAULT_LIMIT < TON_RISE, however, in this configuration, the device will trigger a TON_MAX_FAULT if the VOUT has not risen above the UVF threshold by 4 seconds after the TON_DELAY and TON_RISE times expire.
The TON_MAX_FAULT_LIMIT command is formatted as a linear mode two’s complement binary integer.
| COMMAND | TON_MAX_FAULT_LIMIT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Format | Linear, two's complement binary | |||||||||||||||
| Bit Position | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Access | r | r | r | r | r | r | r | r | r | r/w | r/w | r/w | r/w | r/w | r/w | r/w |
| Function | Exponent | Mantissa | ||||||||||||||
| Default Value | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |