The DRV89xx-Q1 is a pin-to-pin compatible family of integrated multi-channel half-bridge drivers with 4 to 12 half-bridges, primarily targeted for automotive applications such as control of air-conditioning (HVAC) flap DC motor. Alternatively, this device also finds relevance in automotive-body applications such as side-mirrors and LEDs. The DRV8906-Q1 in specific contains 6 half-bridge outputs.

Each of the high-side and low-side drivers can drive RMS currents up to 1 A. The device can drive the brushed-DC (BDC) motors or stepper motors in independent, sequential, or parallel mode. The half-bridges are fully controllable to achieve a forward, reverse, coasting and braking operation of motor. With its wide voltage range, the device can support high fluctuation in battery voltage because of crank-start and load dump conditions.

A standard 16-bit, 5-MHz serial peripheral interface (SPI) with daisy chain capability provides a simple method for configuring the various device settings and reading fault diagnostic information through an external controller. Internal PWM generators are also supported, which allows current limiting during motor operation and can be used for the dimming control of LEDs. The device has four PWM generators which are programmable for four different PWM frequencies and individual 8-bit duty control. Any half-bridge can be mapped to any internal PWM generator for realizing a parallel operation.

The device supports numerous protection and diagnostic features. Open load detection (OLD) feature allows an easy monitoring of the load connected to the half-bridge. The device is fully-protected from short-circuit conditions (short to OUTx, short to supply and short to ground) with OCP protection. Moreover, OTW and OTSD ensures the device thermal protection in scenario of over-heating.

Figure 2-2 DRV8906-Q1 Block Diagram