Analog Integrated Circuit Device Data

10

Freescale Semiconductor

17517

TYPICAL APPLICATIONS

INTRODUCTION

TYPICAL APPLICATIONS

INTRODUCTION

V

Figure 7. 17517 Typical Application Diagram

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

supply pin (VM) (see Figure 8).

Figure 8. CEMF Snubbing Techniques

PCB LAYOUT

When designing the printed circuit board (pcb), connect

sufficient capacitance between power supply and ground

pins to ensure proper filtering from transients. For all high-

current paths, use wide copper traces and shortest possible

distances.

MCU

17517

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

EN1

EN2

IN1

IN1

VM

VDD

0.01

µF

NC

NC

NC

NC

NC = No Connect

OUTA

OUTB

OUTC

17517

5.0 V

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

VM

VDD

OUT

OUT

17517

5.0 V

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

VM

V

DD

OUT

OUT