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Número de pieza
componentes Descripción
SP4425QCU Ver la hoja de datos (PDF) - Signal Processing Technologies
Número de pieza
componentes Descripción
Fabricante
SP4425QCU
Electroluminescent Lamp Driver for Low Noise Applications
Signal Processing Technologies
SP4425QCU Datasheet PDF : 12 Pages
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Handset Application
HON=V
DD
=ON
HON=0V=OFF
V
IN
=3.0V
+
–
C
OSC
=180pF
IN4148
NOTE:
Keep coil as close to
SP4425Q as possible
C
INT
=820pF
C
OSC
V
SS
Coil
HON
V
DD
EL1
D1
EL2
SP4425Q
Figure 5. Typical SP4425Q Application Circuit
0.1
µ
F Low ESR
Decoupling
Capacitor
QR1 = 5k
Ω
QR2 = 5k
Ω
EL Lamp 5Ftl
1.5 sq.in.
4nF
NOTE:
Keep high voltage traces
short and away from V
DD
and clock lines
HON=V
DD
=ON
HON=0V=OFF
V
IN
=3V
C
OSC
=180pF
+
–
IN4148
NOTE:
Keep coil as close to
SP4425 as possible
C
INT
=820pF
C
OSC
V
SS
Coil
HON
V
DD
EL1
D1
EL2
SP4425Q
Figure 6. SP4425Q 3V Test Circuit
0.1
µ
F Low ESR
Decoupling
Capacitor
QR1 = 15k
Ω
700k
Ω
3.9nF
QR2 = 15k
Ω
Test Load
NOTE:
Keep high voltage traces
short and away from V
DD
and clock lines
SP4425QDS/12
SP4425Q Electroluminescent Lamp Driver
7
© Copyright 1998 Sipex Corporation
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