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SP4438 Datasheet(PDF) 5 Page - Sipex Corporation

Part # SP4438
Description  Ultra-Quiet Electroluminescent Lamp Driver For Cellular Phone Applications
PDF  19 Pages
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP4438 Datasheet(HTML) 5 Page - Sipex Corporation

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5
Rev.11/13/00
SP4438 Ultra-Quiet Electroluminescent Lamp Driver
© Copyright 2000 Sipex Corporation
FF7
Q
Q
VBATT
L1
820
µH/14Ω
EL Lamp
87
4
VSS
CINT
COIL
EL2
EL1
CINT
47nF
ELEN
D1
1N4148
VDD
3
2
5
6
1
DMOS
DMOS
PMOS
PMOS
BRIDGE
CONTROL
C1
0.1
µF
ROSC
714k
Ω
C2
1nF
ROSC
SP4438
OSC
Figure 2: Internal Block Diagram of the SP4438
Figure 3: EL Differential Output Waveform of the EL1 and EL2 Outputs of the SP4438



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