TDA5143T - NXP

TDA5143T Brushless DC motor drive circuit

The TDA5143T 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. A special circuit is built-in to reduce the EMI (soft switching output stages). It is ideally suited as a drive circuit for hard disk dr.

Features

• Full-wave commutation (using push/pull drivers at the output stages) without position sensors
• Built-in start-up circuitry
• Three push-pull outputs:
  – output current 0.85 A (typ.)
  – low saturation voltage
  – built-in current limiter
  – soft-switching outputs for low Electromagnetic Interference (EMI)
• Thermal protection
• Flyback diodes
• Tacho output without extra sensor
• Transconductance amplifier for an external control transistor. QUICK REFERENCE DATA Measured over full voltage and temperature range. SYMBOL VP VVMOT VDO ILIM Notes 1. An unstabilized supply can be used. 2. VVMOT = VP; +.