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Texas Instruments DRV8243-Q1 Automotive H-Bridge Driver

Texas Instruments DRV8243-Q1 Automotive H-Bridge Driver is a fully integrated device designed for a wide range of automotive applications. The flexible DRV8243-Q1 can be configured as a single full-bridge driver or as two independent half-bridge drivers. The device utilizes a BiCMOS high power process technology node allowing excellent power handling and thermal capability while providing compact package size, ease of layout, EMI control, accuracy, current sense, robustness, and diagnostic ability.

The TI DRV8243-Q1 Automotive H-Bridge Driver offers an identical pin function with scalable RON (current capability) to support different loads. The DRV8243-Q1 includes an N-channel H-bridge, charge pump regulator, high-side current sensing and regulation, current proportional output, and protection circuitry. Low quiescent current is achieved through the low-power sleep mode. Additional features on the DRV8243-Q1 are voltage monitoring, load diagnostics, and protections against over current and over temperature. Fault conditions are indicated on the nFAULT pin.

The DRV8243-Q1 Driver is 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 deliver more flexibility in device configuration and fault observability.

Features

AEC-Q100 qualified for automotive applications
- –40°C to +125°C, T_A Temperature grade 1
Functional safety-capable
- Documentation available to aid functional safety system design
4.5V to 35V (40V abs. max) operating range
VQFN-HR package: R_{ON_LS} + R_{ON_HS}: 84mΩ
HVSSOP package: R_{ON_LS} + R_{ON_HS}: 98mΩ
I_OUT Max = 12A
PWM frequency operation up to 25KHz with automatic dead time assertion
Configurable slew rate and spread spectrum clocking for low electromagnetic interference (EMI)
Integrated current sense (eliminates shunt resistor)
Proportional load current output on IPROPI pin
Configurable current regulation

Protection and diagnostic features with configurable fault reaction (latched or retry)
- Load diagnostics in both the off-state and on-state to detect open load and short circuit
- Voltage monitoring on supply (VM)
- Over-current protection
- Over-temperature protection
Fault indication on nFAULT pin
Supports 3.3V, 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, solenoids
Door modules, mirror modules, and seat modules
Body control module (BCM)

E-Shifter
Gas engine systems
Onboard charger

Texas Instruments DRV8243-Q1 Automotive H-Bridge Driver

Features

Applications

Simplified Schematic

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