SM8141
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.
PINOUT
8pin VSOP (TOP VIEW)
CHV
LDR
VSS
1
2
3
4
8
7
OUT1
OUT2
VDD
OCE
FEATURES
s
s
s
s
s
s
s
8141A
6
5
OCL
s
s
s
s
s
Dedicated EL driver
50cm
2
maximum EL sheet drive capability
Noise-less smooth drive waveform
Two oscillators (EL and coil)(SM8141A)
Stand-by function (SM8141B)
High-efficiency MOS transistor driver
Dual supply operation possible
(See TYPICAL APPLICATIONS)
2.0 to 5.5V supply operation
200Vp-p maximum drive voltage
250Hz standard drive frequency
8-pinVSOP package
Chip form
CHV
LDR
VSS
OSC
1
2
3
4
8
7
OUT1
OUT2
VDD
ENA
8141B
6
5
PACKAGE DIMENSIONS
(Unit : mm)
ORDERING INFORMATION
DEVICE
S M 8 1 4 1 AV
SM8141BV
CF8141A
CF8141B
PA C K A G E
8pin V S O P
8pin V S O P
Chip form
Chip form
0 to 10
4.4
± 0.2
6.4
±
0.3
0.575 typ
3.1
±
0.3
0.15
−0
.05
+0
.1
0.10
0.22
± 0.1
0.1
± 0.05
0.65
1.15
± 0.05
0.12
M
NIPPON PRECISION CIRCUITS—1
0.5
± 0.2
SM8141
PAD DIMENSIONS
(Unit : mm)
(1800,1300)
7
6
5
4
Y
8
1
NPC
SA8141
3
2
(0,0)
X
Chip size : 1.80
×
1.30 (mm)
Chip thickness : 300 (µm )
Chip base : V
S S
PIN DESCRIPTION
• SM8141A
Pin
number
1
2
3
4
5
6
7
8
P ad
number
6
7
8
1
2
3
4
5
P ad dimensions
Name
X (µm)
CHV
LDR
VSS
OCL
OCE
VDD
OUT2
OUT1
635
435
180
180
1620
1620
1650
1110
Y (µm)
1150
1150
420
180
180
420
1120
1120
I
O
–
I
I
–
O
O
High-voltage DC input
Booster coil driver output
Ground
Coil driver oscillator (oscillator frequency determined by external variable resistor)
EL driver oscillator (oscillator frequency determined by external variable resistor)
Supply
Output 2
Output 1
I/O
Function
• SM8141B
Pin
number
1
2
3
4
5
6
7
8
P ad
number
6
7
8
1
2
3
4
5
P ad dimensions
Name
X (µm)
CHV
LDR
VSS
OSC
ENA
VDD
OUT2
OUT1
635
435
180
180
1620
1620
1650
1110
Y (µm)
1150
1150
420
180
180
420
1120
1120
I
O
–
I
I
–
O
O
High-voltage DC input
Booster coil driver output
Ground
Coil and EL driver oscillator
(oscillator frequency determined by external variable resistor)
E n a ble input (built-in pull-down resistor)
Supply
Output 2
Output 1
I/O
Function
NIPPON PRECISION CIRCUITS—2
SM8141
BLOCK DIAGRAM
• SM8141A
OUT1
OUT2
Divider
VDD
CHV
LDR
High Voltage
Switching Circuit
Divider
Oscillation Circuit
for Voltage Booster
Oscillasion Circuit
for output
• SM8141B
OUT1
OUT2
Divider
VDD
OCL
CHV
LDR
High Voltage
Switching Circuit
Divider
Oscillation Circuit for
boosting voltage and EL drive
OSC
NIPPON PRECISION CIRCUITS—3
ENA
VSS
OCE
VSS
SM8141
SPECIFICATIONS
Absolute Maximum Ratings
V
SS
= 0 V
P arameter
Supply voltage range
Input voltage range
Symbol
V
DD
V
IN
V
CHV
Output voltage
V
LDR
V
OUT1/2
Storage temperature range
Pow er dissipation
Soldering temperature
Soldering time
T
STG
P
D
T
SLD
t
S L D
T
a
≤
85
°C
All Input pins
CHV pin
LDR pin
OUT1 , OUT2 pin
Condition
Rating
−
0.3 to 7.0
V
S S
−
0.3 to V
D D
+ 0.3
0.5 to 120
0.5 to 120
0.5 to 120
−
55 to 125
100
255
10
Unit
V
V
V
V
V
°C
mW
°C
s
Recommended Operating Conditions
V
SS
= 0 V
Rating
P arameter
Supply voltage
Operating temperature
Operating current
1
Coil inductance
Symbol
V
DD
T
O P R
I
D D 2
L
LDR2
Including coil current, V
D D
=
3.0V
Including coil current, V
D D
=
5.0V
f
L D R
= 64 kHz
Condition
min
2.0
−
40
–
–
–
typ
3.0
–
–
–
0.47
max
5.5
85
60
mA
36
–
mH
V
°C
Unit
1. Max value is as same as Absolute Maximum Ratings.
NIPPON PRECISION CIRCUITS—4
SM8141
DC Characteristics
T
a
= 25
°C,
V
SS
= 0 V, V
DD
= 3.0 V unless otherwise noted
Rating
P arameter
Supply voltage
CHV output voltage
OUT1, OUT2 HIGH-level output voltage
O U T 1 , O U T 2 L OW -level output voltage
LDR output resistance
OCE oscillator frequency
A
OCE oscillator frequency range
OCL oscillator frequency
A
OCL oscillator frequency range
OSC oscillator frequency
B
OSC oscillator frequency range
OUT1, OUT2 output frequency
A/B
OUT1, OUT2 output frequency range
LDR inductance driver frequency
A/B
LDR inductance driver frequency range
ENA HIGH-level input voltage
B
E N A L OW -level input voltage
ENA input current
Operating current
Stand-by current
ENA r ise time
B
A/B
B
B
Ver.
A/B
A/B
A/B
A/B
A/B
Symbol
V
DD
V
CHV
V
OUTH
V
OUTL
R
LDR
f
O C E 1
f
O C E 2
f
O C L 1
f
O C L 2
f
O S C 1
f
O S C 2
f
O U T 1
f
O U T 2
f
L D R 1
f
L D R 2
V
ENAH
V
ENAL
I
E N A H
I
D D 1
I
S T B
t
E N A
ENA = “H”, V
D D
= 2.0 to 5.5V
ENA = “L”, V
D D
= 2.0 to 5.5V
V
E N A H
= 3.0V, V
D D
= 3.0V
Excluding coil current
ENA = “L”
V
ENAL
→
V
ENAH
R
O C L
/R
O S C
= 200 kΩ
R
O C E
/R
O S C
= 200 kΩ
R
O S C
= 200 kΩ
R
O C L
= 200 kΩ
I
L D R
= 50 mA
R
O C E
= 200 kΩ
Condition
min
2.0
0.5
–
–
–
205
32
205
32
205
32
200
31
51
8
V
D D
−
0.5
V
S S
−
0.3
2.0
–
–
–
typ
3.0
–
–
–
8.0
256
–
256
–
256
–
250
–
64
–
–
–
4.0
–
–
–
max
5.5
100
100
0.5
12.0
307
kHz
1024
307
kHz
1024
307
kHz
1024
300
Hz
1000
77
kHz
256
V
D D
+
0.3
V
S S
+
0.5
6.0
1
1
100
V
µA
mA
µA
ms
V
V
V
V
Ω
Unit
V
DD
−
0.5
V
SS
V
SS
+
0.5
V
DD
t
ENA
Rise time
NIPPON PRECISION CIRCUITS—5
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