TDA5145

IC MOTOR DRIVER PAR 24SSOP

GENERAL DESCRIPTION

The 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 bidirectional control, brake function and has a special circuit built-in to reduce the EMI soft switching

output stages.

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 2.0 A typ.

  – built-in current limiter

  – soft-switching outputs for low Electromagnetic Interference EMI

• Thermal protection

• Flyback diodes

• Tacho output without extra sensor

• Motor brake facility

• Direction control input

• Reset function

• Transconductance amplifier for an external control transistor.

APPLICATIONS

• General purpose spindle driver e.g.:

  – Hard disk drive

  – Tape drive

  – Optical disk drive.