Automotive 40-V, 21-A H-Bridge driver with integrated current sensing and feedback

The DRV824x-Q1 family of devices is a fully integrated H-bridge driver intended for a

wide range of automotive

applications. The device can be configured as a single full-bridge driver or as two

independent half-bridge drivers. Designed in a BiCMOS high power process technology node, this

monolithic family of devices in a power package offer excellent power handling and thermal

capability while providing compact package size, ease of layout, EMI control, accurate

current sense, robustness, and diagnostic capability. This family provides an identical pin

function with scalable RON (current capability) to support different loads.

The devices integrate a N-channel H-bridge, charge pump regulator, high-side current sensing with regulation, current

proportional output, and protection circuitry. A low-power sleep mode is provided to achieve

low quiescent current. The devices offer voltage monitoring and load diagnostics as well as

protection features against over current and over temperature. Fault conditions are

indicated on nFAULT pin. The devices are available in three variants - hardwired interface:

HW (H) and two SPI interface variants: SPI(P) and SPI(S), with SPI (P) for externally

supplied logic supply and SPI (S) for internally generated logic supply. The SPI interface

variants offer more flexibility in device configuration and fault observability.