17517 데이터 시트보기 (PDF) - Freescale Semiconductor
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17517 Datasheet PDF : 14 Pages
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TYPICAL APPLICATIONS
INTRODUCTION
TYPICAL APPLICATIONS
INTRODUCTION
Figure 7 shows a typical application for the
be sure to connect it via a resistor equal to, or
17517. When
greater than,
applying the gate
RG = VCRES / 0.02
voltage
Ω.
to
the
CRES
pin
from
an
external
source,
VCRES < 14 V
NC
NC
NC
RG > VCRES/0.02 Ω
NC
RG
0.01 µF
5.0 V
17517
C1L
C1H
C2L
C2H
CRES
VDD VM
OUTA
OUTB
MCU
NC = No Connect
EN1
EN2
IN1
OUTC
IN1
GND
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).
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.
5.0 V 5.0 V
17517
VDD VM
C1L
C1H
C2L
OUT
C2H
CRES
OUT
GND
5.0 V 5.0 V
17517
VDD VM
C1L
C1H
C2L
OUT
C2H
CRES
OUT
GND
Figure 8. CEMF Snubbing Techniques
17517
10
Analog Integrated Circuit Device Data
Freescale Semiconductor
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