Analog Integrated Circuit Device Data

14

Freescale Semiconductor

17559

TYPICAL APPLICATIONS

INTRODUCTION

CEMF SNUBBING TECHNIQUES

Care must be taken to protect the IC from potentially

damaging CEMF spikes induced when commutating currents

in inductive loads. Typical practice is to provide snubbing of

voltage transients by placing a capacitor or zener at the motor

supply voltage terminal (VM).

PCB LAYOUT

When designing the printed circuit board (PCB), connect

sufficient capacitance between power supply and ground

terminals to ensure proper filtering against transients. For all

high-current paths, use wide copper traces and the shortest

possible distances.