Description

The VNH9045AQ is a full bridge motor driver intended for a wide range of automotive applications. The device

incorporates a dual monolithic high-side driver and two low-side switches. All switches are designed using

STMicroelectronics well known and proven proprietary VIPower technology that allows to efficiently integrate on

the same die a true Power MOSFET with an intelligent signal/protection circuitry. The three dices are assembled

in a QFN 6x6 triple pad 26+2L package equipped with three exposed islands for optimized dissipation

performances. This package is specifically designed for the harsh automotive environment and offers improved

thermal performance thanks to exposed die pads. The input signals INA and INB can directly interface the

microcontroller to select the motor direction and the brake to VCC condition. Two selection pins (SEL0 and SEL1)

to address the information are available on the multisense to the microcontroller. The multisense pin allows

monitoring the motor current by delivering a current proportional to the motor current value and provides the

diagnostic feedback and Case temperature according to the implemented truth table. The PH_OUT pin provides

feedback on the OUTA and OUTB state for safety-relevant functions. The PWM, up to 25 kHz, allows controlling

the speed of the motor in all possible conditions or selecting the brake to GND condition. In all cases, a low-level

state on the PWM pin turns off both the LSA and LSB switches.

VNH9045AQ

DS14535 - Rev 6

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