JAJSFZ9B October 2017 – January 2021 DRV8873-Q1
PRODUCTION DATA
The device is an integrated, 4.5-V to 38-V motor driver for automotive brushed-motor applications. The device is capable of high output-current drive using low-RDS(ON) integrated MOSFETs.
A standard 4-wire serial peripheral interface (SPI) decreases the device pin count by allowing the various device settings and fault reporting to be managed through an external controller. Alternatively a hardware interface option device is available for easy configuration with less detailed control of all device functions.
The device integrates a current mirror which provides an output current proportional to the current through the high-side FETs. This feature allows the system to monitor the motor current without the need for a large high-power resistor for current sensing. The device has a built-in current regulation feature with a fixed off-time current-chopping scheme. The current-chopping level is selected through SPI in the SPI version of the device and in the hardware version of the device is it a fixed value.
In addition to the high level of driver integration, the device provides a broad range of integrated protection features. These features include power-supply undervoltage lockout (UVLO), charge-pump undervoltage lockout, overcurrent faults, open-load detection, output short to battery and short to ground protection, and thermal shutdown. Device faults are indicated by the nFAULT pin with detailed information available in the device registers.
The device integrates a spread spectrum clocking feature for both the internal digital oscillator and internal charge pump. This feature combined with output slew rate control minimizes the radiated emissions from the device.
The device is available in a 24-pin HTSSOP package with a thermal pad.