ZHCSQL7F May 2010 – May 2022 DRV8312 , DRV8332
PRODUCTION DATA
The FAULT and OTW pins are both active-low, open-drain outputs. Their function is for protection-mode signaling to a PWM controller or other system-control device.
Any fault resulting in device shutdown, such as overtemperatue shut down, overcurrent shut-down, or undervoltage protection, is signaled by the FAULT pin going low. Likewise, OTW goes low when the device junction temperature exceeds 125°C (see Table 7-1).
| FAULT | OTW | DESCRIPTION |
|---|---|---|
| 0 | 0 | Overtemperature warning and (overtemperature shut down or overcurrent shut down or undervoltage protection) occurred |
| 0 | 1 | Overcurrent shut-down or GVDD undervoltage protection occurred |
| 1 | 0 | Overtemperature warning |
| 1 | 1 | Device under normal operation |
TI recommends monitoring the OTW signal using the system microcontroller and responding to an OTW signal by reducing the load current to prevent further heating of the device resulting in device overtemperature shutdown (OTSD).
To reduce external component count, an internal pullup resistor to internal VREG (3.3 V) is provided on both FAULT and OTW outputs. Level compliance for 5-V logic can be obtained by adding external pullup resistors to 5 V (see the Electrical Characteristics section of this data sheet for further specifications).