SLVSDS7B August 2019 – November 2019 DRV8876
In the primary application example, the device is configured to drive a bidirectional current through an external load (such as a brushed DC motor) using an H-bridge configuration. The H-bridge polarity and duty cycle are controlled with a PWM and IO resource from the external controller to the EN/IN1 and PH/IN2 pins. The device is configured for the PH/EN control mode by tying the PMODE pin to GND. The current limit threshold (ITRIP) is generated with an external resistor divider from the control logic supply voltage (VCC). The device is configured for the fixed off-time current regulation scheme by tying the IMODE pin to GND. The load current is monitored with an ADC from the controller to detect the voltage across RIPROPI.