ZHCSRQ4 august 2023 TPSM8S6C24
PRODUCTION DATA
For the response on OC fault, OT fault, and thermal shutdown for multi-phase stack, the shutdown response has the highest priority, followed by restart response. Continue operating without interruption response has the lowest priority.
When multiple faults occur in rapid succession, it is possible for the first fault to occur to mask the second fault. If the first fault to be detected is configured to continue operating without interruption, and the second fault is configured to shutdown and restart, the second fault will shutdown but can fail to restart as programmed.
| FAULT OR WARNING | PROGRAMMING | FAULT RESPONSE SETTING | FET BEHAVIOR | ACTIVE DURING tON_RISE | SMB_ALRT | MASKABLE | PGOOD LOGIC |
|---|---|---|---|---|---|---|---|
| Internal OT fault | (4Fh) OT_FAULT_LIMIT | Shutdown | Both FETs off | Yes | Y | Y | Low |
| Restart | Both FETs off, restart | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| Internal OT warning | (51h) OT_WARN_LIMIT | Shutdown or restart on Fault | FETS still controlled by PWM | Yes | Y | Y | High |
| Ignore fault | |||||||
| TSD | Threshold fixed internally | Shutdown | Both FETs off | Yes | Y | Y | Low |
| Restart | Both FETs off, restart | ||||||
| Ignore | FETS still controlled by PWM | ||||||
| High | |||||||
| Low Side OC fault | (46h) IOUT_OC_FAULT_LIMIT | Shutdown | 3 PWM counts, then both FETs off | Yes | Y | Y | Low |
| Restart | 3 PWM counts, then both FETs off, restart after [DELAY] × tON_RISE | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| Low Side OC warning | (4Ah) IOUT_OC_WARN_LIMIT | Shutdown or restart on Fault | FETS still controlled by PWM | Yes | Y | Y | High |
| Ignore fault | |||||||
| Negative OC fault (lower priority than OVF) | N/A | Enable | Turn off LS FET | Yes | Y | Y | Low |
| Disable | FETS still controlled by PWM | High | |||||
| High side OC fault | (46h) IOUT_OC_FAULT_LIMIT | Shutdown | Three cycles of pulse-by-pulse current limiting followed by both FETs off | Yes | Y | Y | Low |
| Restart | 3 cycles of pulse-by-pulse current limiting followed by both FETs off, restart after [DELAY] × tON_RISE | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| Vout OV fault | (40h) VOUT_OV_FAULT_LIMIT | Shutdown | LS FET latched ON or turned on till VOUTreaches 200 mV/VOUT_SCALE_LOOP; HS FET OFF | No | Y | Y | Low |
| Restart | LS FET latched ON or turned on till VOUTreaches 200 mV/VOUT_SCALE_LOOP; HS FET OFF, restart after [DELAY] × tON_RISE | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| VOUT OVF fix | (40h) VOUT_OV_FAULT_LIMIT | Shutdown | LS FET latched ON or turned on till VOUTreaches 200 mV/VOUT_SCALE_LOOP; HS FET OFF | Yes | Y | Y | Low |
| Restart | LS FET latched ON or turned on till VOUTreaches 200 mV/VOUT_SCALE_LOOP; HS FET OFF, restart after [DELAY] × tON_RISE | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| Vout OV warning | (42h) VOUT_OV_WARN_LIMIT | Shutdown or restart on Fault | FETS still controlled by PWM | No | Y | Y | High |
| Ignore fault | |||||||
| Vout UV fault | (44h) VOUT_UV_FAULT_LIMIT | Shutdown | Both FETs off | No | Y | Y | Low |
| Restart | Both FETs off, restart after [DELAY] × tON_RISE | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| Vout UV warning | (43h) VOUT_UV_WARN_LIMIT | Shutdown or restart on Fault | FETS still controlled by PWM | No | Y | Y | Low |
| Ignore fault | |||||||
| tON MAX rault | (62h) TON_MAX_FAULT_LIMIT | Shutdown | Both FETs off | Yes | Y | Y | Low |
| Restart | Both FETs off, restart after [DELAY] × tON_RISE | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| PVin UVLO | (35h) VIN_ON, (36h) VIN_OFF | Shutdown | Both FETs off | Yes | Y | Y | Low |
| PVIN OV FAULT | (55h) VIN_OV_FAULT_LIMIT | Shutdown | Both FETs off | Yes | Y | Y | Low |
| Restart | Both FETs off, restart | ||||||
| Ignore | FETS still controlled by PWM | High | |||||
| BCX_fault | N/A | N/A | FETS still controlled by PWM | Yes | Y | Y | High |
| Pin_Strap_NonConverge | N/A | VSEL | Both FETs off, pull low VSHARE | No (active before tON_RISE) | N | N/A | Low |
| MSEL1 | |||||||
| MSEL2 | |||||||
| ADRSEL | |||||||
| SYNC_Fault | N/A | Loop controller or standalone device | FETS still controlled by PWM | Yes | N | N/A | High |
| Loop follower device | Both FETs off, pull low VSHARE | ||||||
| Low | |||||||
| SYNC_High/Low | N/A | Loop controller or standalone device | FETS still controlled by PWM | Yes | N | N/A | High |
| Loop follower device | Both FETs off, pull low VSHARE | ||||||
| Low |