SLVSGV9 august 2023 DRV8213
PRODUCTION DATA
The principle of this stall detection scheme relies on the fact that motor current increases during stall conditions as shown in Figure 9-5. The DRV8213 compares the voltage on the IPROPI pin to the voltage on the VREF pin to determine whether a stall condition has occurred. The capacitor on the TINRUSH pin sets the timing, tINRUSH, so the DRV8213 ignores the inrush current at motor startup. The SMODE pin configures how the DRV8213 responds to a stall condition. The IMODE pin configures whether the device regulates current during inrush and stall currents. When a stall condition occures, nSTALL pulls low to indicate the stall event to the microcontroller. Section 8.4.3 provides full details for configuring the stall detection feature.
Table 9-2 summarizes stall detection configuration.
nSTALL | TINRUSH | SMODE | Description |
---|---|---|---|
GND | Z | X | Stall detection disabled. Float TINRUSH. If IMODE = Z, current regulation occurs at all times when VIPROPI ≥ VVREF. |
Pull-up resistor to VCC | GND | X | TI does not recommend this configuration. tINRUSH corresponds to approximately 6.7s. Device continuously sources 10 uA out of TINRUSH pin into GND. If IMODE = Z, current regulation occurs when VIPROPI ≥ VVREF. |
Capacitor to GND | 0 | Latched disable with indication: the OUTx pins disable and the nSTALL pin pulls low after tINRUSH when VIPROPI ≥ VVREF. | |
1 / Z | Indication only: the OUTx pins remain active and the nSTALL pin pulls low after tINRUSH when VIPROPI ≥ VVREF. | ||
Z | X | TI does not recommend this
configuration. Floating TINRUSH pin effectively sets
tINRUSH = 0 seconds. The device responds according to the settings of SMODE and IMODE at all times when VIPROPI ≥ VVREF. | |
VCC | X | TI does not recommend this configuration. Tying TINRUSH to a voltage higher than 1 V effectively sets tINRUSH = 0 seconds. The device draws excessive current from the voltage source due to the TINRUSH discharge path being on. |