SLVSE65C July 2018 – December 2023 DRV8847
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
OLD circuit consists of four main components i.e. current source (and current sink), series sequencing switches (sequenced by the digital core), resistors and comparators. For ground (GND) connected load, the current source (IOL_PU) pulls up the OUTx node to internal regulator voltage (AVDD) and allows the current to flow from internal regulator voltage (AVDD) to ground via the connected load as shown in Figure 8-18. Moreover, for the supply (VM) connected load, the current sink (IOL_PD) pulls down the current from supply voltage (VM) to ground via the connected load as shown in Figure 8-20. The resistance of the load connected at the OUTx terminal will change the source / sink current and indirectly the voltage drop across two resistors (12-kΩ and 15-kΩ). This voltage drop across resistors is compared with the reference voltage (VOL_HS and VOL_LS) by the internal comparators to give the output as OL1_HS and OL1_LS. This comparator output is fed to the open load digital circuit to determine the open load condition.
Following are the values of various parameter shown above: AVDD voltage = 4.2-V, IOL_PU = 200-µA, IOL_PD = 230-µA, VOL_HS = 2.3-V, VOL_LS = 1.2-V.
Note that the values taken above are at the typical condition of supply voltage and temperature. Refer to "Typical Characteristics" section in Section 6 for detailed specifications.