MPC17517 datasheet(10/12 Pages) FREESCALE

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17517

MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

APPLICATIONS

Typical Application

Figure 5 shows a typical application for the 17517. When

applying the gate voltage to the CRES terminal from an external

source, be sure to connect it via a resistor equal to, or greater

than, RG =

CRES/0.02 Ω.

Figure 5. 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

terminal (VM) (see Figure 6).

Figure 6. CEMF Snubbing Techniques

PCB Layout

When designing the printed circuit board (pcb), connect

sufficient capacitance between power supply and ground

terminals 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

VDD

OUTB

OUTC

RES < 14 V

0.01

µF

OUTA

RG >

RES/0.02 Ω

NC = No Connect

17517

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

VDD

OUT

17517

5.0 V

GND

C1L

C1H

C2L

C2H

CRES

VDD

OUT

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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