SM8140A
NIPPON PRECISION CIRCUITS INC.
EL Driver IC
OVERVIEW
The SM8140A is designed for using as EL (Elec-
tronic Luminescence) sheet driver require very low
external parts counts, this result that very compact
and thin EL driver units can be made.
Also this device has the features to use in wider
range of applications demanding low quiescent cur-
rent, low supply voltages, low operating supply cur-
rents, simple brightness control and low EMI
(Electro-Magnetic Interference) emission due to the
inherent smooth driver wave forms.
PIN OUT
( Top View )
14pin SSOP
CHV
LDR
VSS1
OCL2
OCL1
OCE2
OCEl
7
1
14
OUT1
OUT2
CP2
CP1
CPO
VDD
SM8140AM
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
1.80MAX
1.50
Specially providing EL driver functions
Non-transformer for compact outline
Bipolar driving for high power efficiency
Very low noise smooth driver wave forms
Brightness control with driving frequency change
(An external resistance determines the driving fre-
quency)
Low power consumption by quiescent current
control
ON-chip high voltage output MOS transistor
Large EL sheet (Exceeding 100 cm
2
) drivable
supply voltage
V
DD
=
2.4V to 3.6V or 5.0V
1.5V and 3V power applicable
(Refer to APPLICATION HINTS)
Maximum output driver voltage:200V
P
−
P
Typical driver frequency:250Hz
14 pin SSOP
chip form
8
ENA
PIN OUT
( Unit : mm )
4.40
6.40 0.30
8.00
8.20
0.17 0.20
0 10
ORDERING INFOMATION
Device
SM8140AM
CF8140A
Package
14pin SSOP
Chip in tray
0.35 0.10
1.00
0.10 0.10
0.625 0.20
NIPPON PRECISION CIRCUITS—1
SM8140A
PAD DIMENSIONS
( UNIT:µm )
PAD COORDINATES
No.
1
13 12 11 10 9
(2500, 2700)
2
3
4
5
NAME
OCE2
OCE1
ENA
VSS2
VDD
CPO
CP1
CP2
OUT2
OUT1
CHV
MONG
LDR
VSS1
OCL2
OCL1
X
360
900
1440
2080
2310
2310
2310
2310
2300
2100
1900
1700
1500
190
190
190
Y
190
190
190
190
320
560
1100
1640
2530
2530
2530
2530
2530
1600
1040
500
14
15
Y
16
(0, 0)
8
7
6
5
1
X
2
3
4
6
7
8
9
10
11
12
13
14
15
Chip size : 2.50
×
2.70mm
Chip thickness : 4000
±
30µm
Pad size : 100
×
100µm
Chip reverse side : V
SS
16
Note : MONG is test pin.
MONG and VSS2 are not bonding.
NIPPON PRECISION CIRCUITS—2
SM8140A
BLOCK DIAGRAM
(MONG)
OUT1
CHV
LDR
ENA
Enable Circuit
High Voltage
Switching Circuit
CPO
CP1
CP2
Charge Pump
Circuit
Level Shifter
Divider
Divider
Oscillation Circuit
for Voltage Booster
Oscillasion Circuit
for output
VSS1
VSS2
OCE1
PIN DESCRIPTION
SSOP
1
−
2
3
−
4
5
6
7
8
9
10
11
12
13
14
chip
11
12
13
14
4
15
16
1
2
3
5
6
7
8
9
10
Pin Name
CHV
MONG
LDR
VSS1
VSS2
OCL2
OCL1
OCE2
OCE1
ENA
VDD
CPO
CP1
CP2
OUT2
OUT1
i/o
i
o
o
−
−
o
i
i
o
ip
1
−
o
o
o
o
o
DC high voltage pin
Monitor gate
Step
−
up inductor driver output
GND
GND
CR oscillator pin for step
−
up inductor and charge pump.
External resistor at this pin determines oscillator frequency.
CR oscillator pin for output
External resistor at this pin determines oscillator frequency
Output control pin. Output from OUT1 and OUT2 pins are stopped When "L".
Power supply pin
Charge pump output (Voltage output for driving high voltage MOS)
Charge pump external capacitor pin
Charge pump external capacitor pin
Output for EL
Output for EL
Function
1. "ip" defines input pin with pull down internal resistor
OCL2
NIPPON PRECISION CIRCUITS—3
OCE2
OCL1
OUT2
VDD
SM8140A
ABSOLUTE MAXIMUM RATINGS
V
SS
=
0V, Unless otherwise noted
Parameter
Supply voltage range
Input voltage range
Symbol
V
DD
V
IN
V
CHV
Output voltage
V
LDR
V
OUT1
V
OUT2
Power dissipation
Storage temperature range
Soldering temperature
Soldering time
P
D
T
STG
T
SLD
t
SLD
Package only
Package only
All input pins
CHV pins
LDR pins
OUT1 pins
OUT2 pins
Ta
≤
70
°C
Condition
Rating
−
0.3 to
+
8.0
V
SS
−
0.3 to V
DD
+
0.3
0.5 to 120
0.5 to 120
0.5 to 120
0.5 to 120
200
−
55 to 125
255
10
mW
°C
°C
sec
V
unit
V
V
RECOMMENDED OPERATING CONDITIONS
V
SS
=
0V, Unless otherwise noted
Parameter
Symbol
V
DD1
V
DD2
T
OPR
I
DD2
I
DD3
L
LDR1
L
LDR2
Including inductor current, V
DD
=
3.0V
Including inductor current, V
DD
=
5.0V
f
LDR
=
32kHz, V
DD
=
3.0V
f
LDR
=
32kHz, V
DD
=
5.0V
CPO
=
V
DD
1
Condition
Rating
min
2.4
4.5
−
30
−
−
−
−
typ
−
−
−
20
25
1.0
1.5
max
3.6
5.5
70
100
100
−
−
unit
V
V
°C
mA
mA
mH
mH
Supply voltage range
Operating temperature range
Operating current
2
Using inductor
1. 5V Application hints is different from 3V ones (Refer to APPLICATION HINTS)
2. Max value is as same as Absolute Maximum Ratings
ELECTRICAL CHARACTERISTICS
Ta
=
25
°C,
V
SS
=
0V, V
DD
=
3.0V, unless otherwise noted
Parameter
Supply voltage range
Pin
VDD
CPO
Output voltage
CHV
OUT1/2
OUT1/2
Output resistance
Oscillation frequency
Driving frequency
Output frequency
Input voltage
Input current
Operating current
Stand
−
by current
LDR
OCE1/2
OCL1/2
OUT1/2
LDR
ENA
ENA
VDD
VDD
Symbol
V
DD
V
CPO
V
CHV
V
OUTH
V
OUTL
R
LDR
f
OCE
f
OCL
f
OUT
f
LDR
V
ENAH
V
ENAL
I
ENAH
I
DD1
I
STB
V
CPO
=
6.0V
R
OCE
=
3.9MΩ
R
OCL
=
100kΩ
1
R
OCE
=
3.9MΩ
2
R
OCL
=
100kΩ
ENA
=
"H"
ENA
=
"L"
V
ENAH
=
3.0V
Excluding inductor current
ENA
=
"L"
V
CPO
≤
2
×
V
DD
Condition
Rating
min
2.4
4.5
0.5
−
−
−
5.6
179
175
22.4
V
DD
+
1.0
V
SS
−
0.3
0.45
−
−
typ
−
5.5
−
−
−
5.0
8.0
256
250
32
−
−
0.75
−
−
max
3.6
−
100
100
0.5
10.0
10.4
332
325
41.6
V
DD
+
0.3
V
SS
+
1.0
1.05
1
1
Ω
kHz
Hz
kHz
V
µA
mA
µA
V
unit
V
1. R
OSC
determines EL driver frequency 20k to 100kHz
2. R
OSC
determines EL driver frequency 200 to 500Hz
NIPPON PRECISION CIRCUITS—4
SM8140A
APPLICATION HINTS
+
0.1µF
100V
1.0kΩ
CHV
LDR
VSS1
OCL2
OUT1
OUT2
CP2
CP1
CPO
VDD
ENA
510Ω
EL sheet
+
470pF
EL sheet : SPI ULTRA−THIN TYPE
EL sheet size : 10 to 20cm
2
Current consumption : 20mA (typ.)
SM8140AM
1.0mH
100kΩ
OCL1
OCE2
OCEl
0.01µF
+
3.9MΩ
3.0V
Diode : TOSHIBA 1SS250
Coil : MURATA LQH4N102K04M00
+
0.1µF
100V
1.0kΩ
CHV
LDR
VSS1
OCL2
OUT1
OUT2
CP2
CP1
CPO
VDD
ENA
510Ω
EL sheet
+
470pF
EL sheet : SPI ULTRA−THIN TYPE
EL sheet size : 20 to 40cm
2
Current consumption : 40mA (typ.)
SM8140AM
0.47mH
100kΩ
OCL1
OCE2
OCEl
0.01µF
+
3.9MΩ
3.0V
Diode : TOSHIBA 1SS250
Coil : MURATA LQH4N471K04M00
+
0.1µF
100V
1.0kΩ
CHV
LDR
VSS1
OUT1
OUT2
CP2
CP1
CPO
VDD
ENA
510Ω
EL sheet
+
EL sheet : SPI ULTRA−THIN TYPE
EL sheet size : 10 to 20cm
SM8140AM
0.47mH
OCL2
OCL1
OCE2
OCEl
470pF
Current consumption : 20mA (typ.)
100kΩ
0.01µF
+
1.5V
3.9MΩ
3.0V
Diode : TOSHIBA 1SS250
Coil : MURATA LQH4N471K04M00
NIPPON PRECISION CIRCUITS—5
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