EVAL6205N;中文规格书,Datasheet资料

AN1762

APPLICATION NOTE

L6205, L6206, L6207 DUAL FULL BRIDGE DRIVERS

by Vincenzo Marano

Modern motion control applications need more flexibility that can be addressed only with specialized ICproducts. The L6205, L6206, L6207 are dual full bridge drivers ICs specifically developed to drive a widerange of motors. These ICs are one-chip cost effective solutions that include several unique circuit designfeatures. These features allow the devices to be used in many applications including DC and stepper motordriving. The principal aim of this development project was to produce easy to use, fully protected power ICs.In addition several key functions such as protection circuit and PWM current control drastically reduce exter-nal components count to meet requirements for many different applications.

1INTRODUCTION

The L6205, L6206, L6207 are highly integrated, mixed-signal power ICs that allow the user to easily design acontrol system for two-phase bipolar stepper motors, multiple DC motors and a wide range of inductive loadsFigure 1 to Figure 3 show the L6205, L6206, L6207 block diagrams. Each IC integrates eight Power DMOS plusother added features for safe operation and flexibility. The L6207 also features a constant tOFF PWM currencontrol technique (Synchronous mode) for each of the two full bridges. Figure 1. L6205 block diagram.

December 20031/53

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