The L6228 is a fully-integrated stepper motor driver IC specifically developed to drive a wide range of two-phase (bipolar) stepper motors. This IC is a one-chip, cost-effective solution that includes several unique circuit design features. These features, including a decoding logic that can generate three different stepping sequences, allow the device to be used in many applications, including microstepping. The principal aim of this development project was to produce an easy-to-use, fully-protected power IC. In addition, several key functions, such as protection circuitry and PWM current control, drastically reduce the number of external components to meet requirements for many different applications. The L6228 is a highly-integrated, mixed-signal power IC that allows the user to easily design a complete motor control system for two-phase bipolar stepper motors.
This document is an application note for the L6228, a fully-integrated mixed-signal power IC designed to drive two-phase (bipolar) stepper motors. It details the internal architecture, including eight Power DMOSs and a centralized logic circuit for phase generation and PWM current control. The note aims to help users design complete motor control systems by explaining key functions such as protection circuitry and current chopping techniques.
| Maximum output current (per OUT pin) | 1.4 Arms |
|---|---|
| Maximum peak current (per OUT pin) | 2.8 A |
| Total maximum output current | 2.8 Arms |
| Supply voltage operating range | 8 to 52 V |
| Undervoltage lockout shutdown threshold | 5.5 V |
| Undervoltage lockout resume threshold | 6.3 V |
| DMOS drain-source breakdown voltage | 60 V |
The L6228 is specifically developed to drive a wide range of two-phase (bipolar) stepper motors.
Yes, the IC includes decoding logic that can generate three different stepping sequences, allowing it to be used in microstepping applications.
The OCD provides protection against short-circuits between the outputs and between an output and ground.
An undervoltage lockout (UVLO) circuit shuts down the device until the supply voltage exceeds 6.3 V.