SLUSEJ1 December 2021 TPSM8D6C24
|Write Transaction:||Write Byte|
|Read Transaction:||Read Byte|
|Format:||Unsigned Binary (1 byte)|
The OT_FAULT_RESPONSE command instructs the device on what action to take in response to an Overtemperature Fault. Upon triggering the overtemperature fault, the converter responds per the data byte below, and the following actions are taken:
Note: the OT Fault hysteresis is set by the Section 7.6.44. When Section 7.6.66 falls below Section 7.6.44, the overtemperature fault condition will be released and restart will be allowed if selected by Section 7.6.43. If Section 7.6.44 is programmed higher than Section 7.6.42, a default hysteresis of 20°C will be used instead.
|LEGEND: R/W = Read/Write; R = Read only|
|7:6||OTF_RESP||RW||NVM||Overtemperature fault response|
00b: Ignore. Continue operating without interruption.
01b: Delayed Shutdown Continue Operating for 10ms x OT_DELAY. If OT_FAULT is still present, shut down and restart according to OT_RETRY.
10b: Immediate Shutdown. Shut down and restart according to OT_RETRY.
11b: Shutdown until Temperature is below OT_WARN_LIMIT, then restart according to OT_RETRY*.
0d: Do not attempt to restart (latch off).
1d-6d: After shutting down, wait one HICCUP period, and attempt to restart up to 1 - 6 times. After 1 - 6 failed restart attempts, do not attempt to restart (latch off). Restart attempts that occur while temperature is above OT_WARN_LIMIT will not be observable but will be counted.
7d: After shutting down, wait one HICCUP period, and attempt to restart indefinitely, until commanded OFF or a successful start-up occurs.
|2:0||OT_DELAY||RW||NVM||Overtemperature delay time for respond after delay and HICCUP|
0d: Shutdown delay of 10 ms, HICCUP equal to TON_RISE, HICCUP delay equal to TON_RISE
1d - 7d: Shutdown delay of 1-7 ms, HICCUP equal to 2-4 times TON_RISE
Attempts to write Section 7.6.43 to any value outside those specified as valid will be considered invalid/unsupported data 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.
*When Section 7.6.43 OTF_RESP (Bits 7:6) are set to 11b - shut down until temperature is below Section 7.6.44, issuing a Section 7.6.4 command while the temperature is between Section 7.6.42 and Section 7.6.44 can result in the TPSM8D6C24 remaining in the OT FAULT state until the temperature rises above Section 7.6.42 or disabled and enabled according to Section 7.6.3.