March 2014

DocID025336 Rev 1

1/23

AN4370

Application note

L99ASC03 PMBLDC sensorless 3-phase motor driver

G. Celeste; G.Maimone

Introduction

The L99ASC03 is a 3-phase BLDC driver IC. The device can drive six external MOSFETs in

BLDC drive systems and detect back EMF zero-crossing events, thus allowing sensorless

rotor position detection.

This application note is intended to provide guidance to users on specific application-related

topics.

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