ZHCSP56 September 2023 TPS1HTC30-Q1
PRODUCTION DATA
Current Sensing is active when DIAG_EN enabled. When DIAG_EN is low, current sense is disabled. The SNS output is in high-impedance mode.
| DIAG_EN | EN Condition | Protections and Diagnostics |
|---|---|---|
| HIGH |
HIGH |
See Fault Table |
| LOW | ||
| LOW | HIGH | Diagnostics disabled, FAULT and SNS output set to high impedance. Protection is normal. |
| LOW |
| Conditions | EN | VOUT | FAULT | SNS | Behavior | Recovery |
|---|---|---|---|---|---|---|
| Normal | L | L | Hi-Z | 0 | Normal | |
| H | H | Hi-Z | ILoad / KSNS | Normal | ||
| Overcurrent | H | VS - ILIM*RLOAD | L | VSNSFH | Holds the current at the current limit until thermal shutdown | |
| Overvoltage | H | H →L | L | VSNSFH | Channel turns off if VS > VS,OVPR, turns back on if VS < VS,OVPRF | |
| STG, Relative Thermal Shutdown, Absolute Thermal Shutdown | H | H→L | L | VSNSFH | Shuts down when devices hits relative or absolute thermal shutdown | Auto retries when THYS is met and time has been longer than tRETRY amount of time |
| Open load | H | H | Hi-Z | ILoad / KSNS = approximately 0 | Normal behavior, user can judge if it is an open load or not | |
| L | H | L | VSNSFH | Internal pullup resistor is active. If VS – VOUT < VOL then fault active | Clears when fault goes away | |
| Reverse Polarity | x | x | x | x | Channel turns on to lower power dissipation. Current into ground pin is limited by external ground network |