Analog Integrated Circuit Device Data
10 Freescale Semiconductor
17517
TYPICAL APPLICATIONS
INTRODUCTION
TYPICAL APPLICATIONS
INTRODUCTION
Figure 7 shows a typical application for the 17517. When applying the gate voltage to the C
RES
pin from an external source,
be sure to connect it via a resistor equal to, or greater than, R
G
=
V
C
RES
/ 0.02 Ω.
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
V
C
RES
< 14 V
0.01 µF
NC
NC
NC
NC
R
G
>
V
C
RES
/0.02Ω
R
G
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
