SM8141
NIPPON PRECISION CIRCUITS--1
NIPPON PRECISION CIRCUITS INC.
EL Sheet Driver
OVERVIEW
The SM8141 is a transformer-less electrolumines-
cent (EL) sheet lamp driver, capable of driving sheets
up to 50cm
2
in size. It employs built-in high with-
stand voltage output MOS transistors and requires
few external components, making it ideal for com-
pact driver units in portable equipment.
FEATURES
s
Dedicated EL driver
s
50cm
2
maximum EL sheet drive capability
s
Noise-less smooth drive waveform
s
Two oscillators (EL and coil)(SM8141A)
s
Stand-by function (SM8141B)
s
High-efficiency MOS transistor driver
s
Dual supply operation possible
(See TYPICAL APPLICATIONS)
s
2.0 to 5.5V supply operation
s
200Vp-p maximum drive voltage
s
250Hz standard drive frequency
s
8-pinVSOP package
s
Chip form
ORDERING INFORMATION
PINOUT
8pin VSOP (TOP VIEW)
PACKAGE DIMENSIONS
(Unit : mm)
D E V I C E
PA C K A G E
S M 8 1 4 1 AV
8pin V S O P
S M 8 1 4 1 B V
8pin V S O P
C F 8 1 4 1 A
Chip form
C F 8 1 4 1 B
Chip form
1
CHV
2
LDR
3
VSS
4
OCL
5
OCE
6
VDD
7
OUT2
8
OUT1
8141A
1
CHV
2
LDR
3
VSS
4
OSC
5
ENA
6
VDD
7
OUT2
8
OUT1
8141B
0.575 typ
3.1
0.3
1.15
0.05
4.4
0.2
6.4
0.3
0.5
0.2
0.1
0.05
0.22
0.1
0.65
0.12
M
0.10
0 to 10
0.15
+
0.1
-
0.05
SM8141
NIPPON PRECISION CIRCUITS--2
PAD DIMENSIONS
(Unit : mm)
PIN DESCRIPTION
SM8141A
SM8141B
Chip size : 1.80
1.30 (mm)
Chip thickness : 300 (
m )
Chip base : V
S S
Pin
n u m b e r
P ad
n u m b e r
N a m e
P a d d i m e n s i o n s
I / O
Function
X (m)
Y (m)
1
6
C H V
6 3 5
1 1 5 0
I
High-voltage DC input
2
7
L D R
4 3 5
1 1 5 0
O
Booster coil driver output
3
8
V S S
1 8 0
4 2 0
G r o u n d
4
1
O C L
1 8 0
1 8 0
I
Coil driver oscillator (oscillator frequency determined by external variable resistor)
5
2
O C E
1 6 2 0
1 8 0
I
EL driver oscillator (oscillator frequency determined by external variable resistor)
6
3
V D D
1 6 2 0
4 2 0
Supply
7
4
O U T 2
1 6 5 0
1 1 2 0
O
Output 2
8
5
O U T 1
1 1 1 0
1 1 2 0
O
Output 1
Pin
n u m b e r
P ad
n u m b e r
N a m e
P a d d i m e n s i o n s
I / O
Function
X (m)
Y (m)
1
6
C H V
6 3 5
1 1 5 0
I
High-voltage DC input
2
7
L D R
4 3 5
1 1 5 0
O
Booster coil driver output
3
8
V S S
1 8 0
4 2 0
G r o u n d
4
1
O S C
1 8 0
1 8 0
I
Coil and EL driver oscillator
(oscillator frequency determined by external variable resistor)
5
2
E N A
1 6 2 0
1 8 0
I
E n a b le input (built-in pull-down resistor)
6
3
V D D
1 6 2 0
4 2 0
Supply
7
4
O U T 2
1 6 5 0
1 1 2 0
O
Output 2
8
5
O U T 1
1 1 1 0
1 1 2 0
O
Output 1
1
2
3
4
5
6
7
8
(0,0)
(1800,1300)
Y
X
NPC
SA8141
SM8141
NIPPON PRECISION CIRCUITS--3
BLOCK DIAGRAM
SM8141A
SM8141B
Oscillation Circuit
for Voltage Booster
Divider
Oscillasion Circuit
for output
Divider
High Voltage
Switching Circuit
OUT2
VDD
CHV
OUT1
LDR
VSS
OCE
OCL
Oscillation Circuit for
boosting voltage and EL drive
Divider
Divider
High Voltage
Switching Circuit
OUT2
VDD
CHV
OUT1
LDR
VSS
ENA
OSC
SM8141
NIPPON PRECISION CIRCUITS--4
SPECIFICATIONS
Absolute Maximum Ratings
V
SS
= 0 V
Recommended Operating Conditions
V
SS
= 0 V
P arameter
S y m b o l
Condition
Rating
Unit
Supply voltage ra n g e
V
D D
-
0.3 to 7.0
V
Input voltage ra n g e
V
IN
All Input pins
V
S S
-
0.3 to V
D D
+ 0.3
V
Output voltage
V
C H V
CHV pin
0.5 to 120
V
V
L D R
LDR pin
0.5 to 120
V
V
O U T 1 / 2
OUT1 , OUT2 pin
0.5 to 120
V
Storage temperature ra n g e
T
S T G
-
55 to 125
C
P ow er dissipation
P
D
T
a
85
C
1 0 0
m W
Soldering temperature
T
S L D
2 5 5
C
Soldering time
t
S L D
1 0
s
P arameter
S y m b o l
Condition
Rating
Unit
m i n
typ
m a x
Supply voltage
V
D D
2.0
3.0
5.5
V
O p e rating temperature
T
O P R
-
4 0
8 5
C
O p e rating current
1
1. Max value is as same as Absolute Maximum Ratings.
I
D D 2
Including coil current, V
D D
=
3.0V
6 0
m A
Including coil current, V
D D
=
5.0V
3 6
Coil inductance
L
L D R 2
f
L D R
= 64 kHz
0.47
m H
SM8141
NIPPON PRECISION CIRCUITS--5
DC Characteristics
T
a
= 25
C, V
SS
= 0 V, V
DD
= 3.0 V unless otherwise noted
P arameter
V er.
S y m b o l
Condition
Rating
Unit
m i n
typ
m a x
Supply voltage
A / B
V
D D
2.0
3.0
5.5
V
CHV output voltage
A / B
V
C H V
0.5
1 0 0
V
O U T 1 , O U T 2 H I G H - l evel output voltage
A / B
V
O U T H
1 0 0
V
O U T 1 , O U T 2 L OW -level output voltage
A / B
V
O U T L
0.5
V
LDR output resistance
A / B
R
L D R
I
L D R
= 50 mA
8.0
12.0
OCE oscillator frequency
A
f
O C E 1
R
O C E
= 200 k
2 0 5
2 5 6
3 0 7
k H z
OCE oscillator frequency ra n g e
f
O C E 2
3 2
1 0 2 4
OCL oscillator frequency
A
f
O C L 1
R
O C L
= 200 k
2 0 5
2 5 6
3 0 7
k H z
OCL oscillator frequency ra n g e
f
O C L 2
3 2
1 0 2 4
OSC oscillator frequency
B
f
O S C 1
R
O S C
= 200 k
2 0 5
2 5 6
3 0 7
k H z
OSC oscillator frequency ra n g e
f
O S C 2
3 2
1 0 2 4
OUT1, OUT2 output frequency
A / B
f
O U T 1
R
O C E
/R
O S C
= 200 k
2 0 0
2 5 0
3 0 0
H z
OUT1, OUT2 output frequency ra n g e
f
O U T 2
3 1
1 0 0 0
LDR inductance driver frequency
A / B
f
L D R 1
R
O C L
/R
O S C
= 200 k
5 1
6 4
7 7
k H z
LDR inductance driver frequency ra n g e
f
L D R 2
8
2 5 6
E N A H I G H - l evel input voltage
B
V
E N A H
ENA = "H", V
D D
= 2.0 to 5.5V
V
D D
-
0.5
V
D D
+
0.3
V
E N A L O W -level input voltage
V
E N A L
ENA = "L", V
D D
= 2.0 to 5.5V
V
S S
-
0.3
V
S S
+
0.5
ENA input current
B
I
E N A H
V
E N A H
= 3.0V, V
D D
= 3.0V
2.0
4.0
6.0
A
O p e rating current
A / B
I
D D 1
Excluding coil current
1
m A
Stand-by current
B
I
S T B
ENA = "L"
1
A
ENA r ise time
B
t
E N A
V
E N A L
V
E N A H
1 0 0
m s
Rise time
t
ENA
V
SS
V
DD
V
DD
0.5
-
V
SS
0.5
+
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