SM8144B
NIPPON PRECISION CIRCUITS INC.
EL Sheet Driver
OVERVIEW
The SM8144B is a transformer-less electroluminescent (EL) driver IC, capable of driving displays up to 80
cm
2
in size. It is a high-efficiency driver that features revised coil switching transistor ON resistance and output
circuit configuration to reduce loss, all in a compact package.
A microcontroller interface pin (ENA) is provided, which can be used to control the EL driver ON/OFF func-
tion. The device is available in 8-pin VSOP packages.
FEATURES
s
s
s
PINOUT
(Top view)
ina
CHV
1
2
3
4
LDR
VSS
s
s
s
s
s
Dedicated EL driver
1.6 to 5.5 V supply voltage
100mA maximum operating current
(V
DD
= 3.0V, Ta
≤
70
°
C)
3.5
Ω
typical output resistance
200 Vp-p maximum EL driver voltage*
31 to 1500 Hz EL drive frequency range*
High voltage CMOS Process
8-pin VSOP plastic package
OSC
*: Adjustable with external resistance.
s
s
s
Hand held PC, Palm size PC
Mobile IT equipment
White EL
lim
P ackag e
8-pin V S O P
APPLICATIONS
PACKAGE DIMENSIONS
(Unit : mm)
0 to 10
ORDERING INFORMATION
D e vice
SM8144BV
4.4
± 0.2
6.4
±
0.3
0.575 typ
3.1
±
0.3
1.15
± 0.05
0.15
−0
.05
+0
.1
pre
0.10
0.22
± 0.1
0.1
± 0.05
0.65
0.12
M
NIPPON PRECISION CIRCUITS—1
0.5
± 0.2
ry
8
7
6
5
OUT1
OUT2
VDD
ENA
8144BV
NPC [ NIPPON PRECISION CIRCUITS INC ]
