TDA5142T Bipolar Integrated Circuit

General Description

The TDA5142T is a bipolar integrated circuit used to drive 3-phase brushless DC motors in full-wave mode. The device is sensorless (saving of 3 hall-sensors) using the back-EMF sensing technique to sense the rotor position. It includes a brake function and 6 pre-drivers able to control FETs or bipolar external transistors. It is ideally suited for high-power applications such as high-end hard disk drives, automotive and other applications.

Features

• Full-wave commutation without position sensors
• Built-in start-up circuitry
• Six outputs that can drive three external transistor pairs:
  • output current 0.2 A (typ.)
  • low saturation voltage
  • built-in current limiter
• Thermal protection
• Tacho output without extra sensor
• Transconductance amplifier for an external control transistor
• Motor brake facility.