Analog Integrated Circuit Device Data

12

Freescale Semiconductor

17550

TYPICAL APPLICATIONS

INTRODUCTION

CEMF SNUBBING TECHNIQUES

Care must be taken to protect the IC from potentially

damaging CEMF spikes induced when commuting 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) (see Figure 8).

Figure 8. CEMF Snubbing Techniques

175XX

5.0 V

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

VM

VDD

OUT

OUT

175XX

5.0 V

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

VM

VDD

OUT

OUT