SP4491 Datasheet, PDF (4/13 Pages) Sipex Corporation – Two Panel Electroluminscent Lamp Driver

VBATT
VDD
2
560kΩ
C1
C2*
0.1µF
1nF
ROSC 3 ^OSC
* optional device
1
ELEN1
0
4
1
ELEN2
SP4491
FF7
5
VSS
fCOIL
fLAMP1
SCR1
fLAMPCOM
fLAMP2
10
EL1
EL Lamp
SCR2
VBATT
6 COIL
9 CAP
L1
2.2mH
D1
1N4148
CINT
1000pF
SCR3
8
9
ELcommon
EL2
EL Lamp
Figure 1: Internal Block Diagram of SP4491
ELEN1 ELEN2 EL1 Output
0
0
OFF
0
1
OFF
1
0
ON
1
1
ON
Table 1: Control Line Logic Table
EL2 Output
OFF
ON
OFF
ON
Rev. 12/19/00
SP4490 Two Panel Electroluminescent Lamp Driver
4
© Copyright 2000 Sipex Corporation