VNH9045AQTR [STMicroelectronics]

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.

• AEC-Q100 qualified
• ISO 26262 ready
• 3 V CMOS compatible inputs
• Undervoltage shutdown
• Overvoltage clamp
• Thermal shutdown
• Cross-conduction protection
• Current and power limitation
• Very low standby power consumption
• Protection against loss of ground and loss of V_CC
• PWM operation up to 25 kHz
• Multisense monitoring functions
  • Analog motor current feedback
  • Chip temperature monitoring
• Multisense diagnostic functions
  • Output short to ground detection
  • Thermal shutdown indication
  • OFF-state open-load detection
  • High-side power limitation indication
  • Low-side overcurrent shutdown indication
  • Output short to V_CC detection
• Output protected against short to ground and short to V_CC
• Standby mode
• Half bridge operation