Description:

The DRV824x-Q1 device family is a fully integrated H-bridge driver designed 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. This monolithic power package device system, designed using a BiCMOS high-power process technology node, provides excellent power handling and thermal performance, with a small package size, ease of layout, and robust EMI control, precise current sensing, and diagnostic capabilities. The family offers identical pin functions and scalable RON (current capability) to support different loads. These devices integrate N-channel H-bridges, charge pump regulators, high-side current sensing and regulation, current proportional outputs, and protection circuits. A low-power sleep mode is also provided to achieve low quiescent current. The devices offer voltage monitoring and load diagnostics, as well as overcurrent and overtemperature protection. Fault conditions are indicated on the nFAULT pin. The devices are available in three variants — Hardware interface: HW (H), and two SPI variants: SPI (P) and SPI (S), where SPI (P) is for an externally supplied logic supply and SPI (S) is for an internally generated logic supply. The SPI variants enable more flexible device configuration and fault monitoring.

Features:

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• Functional safety capable

– Documentation available to aid in the design of functional safety systems

• 4.5V to 35V (absolute maximum 40V) operating voltage range

• VQFN-HR package: RON_LS + RON_HS: 32mΩ

• HTSSOP package: RON_LS + RON_HS: 40mΩ

• IOUT maximum = 32A

• PWM operation up to 25KHz with automatic dead-time assertion

• Configurable slew rate and spread-spectrum clocking for low EMI

• Integrated current sensing (no shunt resistor required)

• Proportional load current output on IPROPI pin

• Configurable current regulation

• Protection and diagnostic features with configurable fault response (latch or retry)

– Load diagnostics in both off-state and on-state to detect open load and short circuits

– Voltage monitoring on power supply (VM)

– Overcurrent protection

– Overtemperature protection

– Fault indication on nFAULT pin

• Supports 3.3V and 5V logic inputs

• Low sleep current: 1µA typical at 25°C

• 3 variants: HW (H), SPI (S), or SPI (P)

• Configurable control modes:

– Single full-bridge using PWM or PH/EN mode

– Two half-bridges using independent mode

• Device family comparison table

Applications:

• Automotive brushed DC motors and solenoids

• Door modules, wiper modules, trunk and seat modules

• Body Control Modules (BCM)

• Electronic shifters

• Steering systems

• Gasoline engine systems

• On-board chargers