KIT17C724EPEVBE【PDF 9/15 页】KIT FOR 17C7242CH HBRIDGE PWR IC

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TYPICAL APPLICATIONS

FUNCTIONAL PIN DESCRIPTION

TYPICAL APPLICATIONS

Figure 6 shows a typical application for the 17C724.

3.0 V

17C724

VDD

VM

OUT1A

OUT1B

IN1A

IN1B

OUT2A

MCU

IN2A

IN2B

PSAVE

OUT2B

GND

Figure 6. 17C724 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 zener or capacitor at the

supply pin (VM) (see Figure 7 ).

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

distance.

3.0 V

3.0 V

3.0 V

3.0 V

APPLICATION NOTES

17C724

V DD VM

OUT

OUT

OUT

OUT

GND

17C724

V DD VM

OUT

OUT

OUT

OUT

GND

Although VM1 and VM2 are connected internally, they

must be connected externally to attain sufficient power

distribution.

Take precautions to guard against electrostatic discharge

when handling the device, especially when mounting and

demounting the device to a PCB.

Figure 7. CEMF Snubbing Techniques

17C724

Analog Integrated Circuit Device Data

Freescale Semiconductor

9

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