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SM8142
NIPPON PRECISION CIRCUITS INC.
EL Sheet Driver
OVERVIEW
The SM8142 is a transformer-less electroluminescent (EL) sheet lamp driver, capable of driving sheets up to
2
30 cm
in size. It employs a high-efficiency driver output circuit configuration to control power dissipation. It
is available in ultra-small 8-pin SON (Small Outline Non-leaded) packages*, making possible the construction
of small, thin, low-power driver units.
* : SM8142 × D
FEATURES
■
Dedicated EL driver
■
Noise-less smooth drive waveform
■
High-efficiency output circuit
■
Two oscillator circuits built-in (SM8142A)
■
Stand-by function (SM8142B)
■
Stable temperature characteristics
■
Ultra-small package
■
1.6 to 5.5 V supply voltage
■
0.3 mA typ. (V
(excluding coil current)
■
200 Vp-p maximum EL driver voltage
■
31 to 1000 Hz EL drive frequency range
■
0.22 mH minimum coil inductance
= 3.0 V) current consumption
DD
ORDERING INFORMATION
De vice Pack ag e
SM8142AD 8-pin SON
SM8142BD 8-pin SON
SM8142AV 8-pin VSOP
SM8142BV 8-pin VSOP
NIPPON PRECISION CIRCUITS—1
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SM8142
PINOUT
■
8-pin SON
(Top View)
SM8142AD
1
VSS
OCL
2
3
OCE
4VDD OUT2
SM8142BD
1
VSS
OSC
2
3
ENA
4VDD OUT2
8
LDR
4A
7
6
5
8
CHV
OUT1
LDR
2
4B
7
6
5
CHV
OUT1
2
PACKAGE DIMENSIONS
■
8-pin SON
2.90 ± 0.1
2.80 ± 0.1
0.48typ
0.125 ± 0.05
0.65
0.30
+ 0.1
− 0.05
+ 0.1
0.05
0.05
0.20 ± 0.08
(Unit : mm)
3.00 ± 0.1
− 0.05
0.80
M
0.20 ± 0.08
■
8-pin VSOP
SM8142AV
1CHV
2LDR
3VSS
8142A
4OCL 5 OCE
8 OUT1
7 OUT2
6 VDD
SM8142BV
1CHV
2LDR
3VSS
8142B
4OSC 5 ENA
8 OUT1
7 OUT2
6 VDD
8-pin VSOP
■
0.575 typ
0.65
3.1 ± 0.3
0.22 ± 0.1
4.4 ± 0.2
1.15 ± 0.05
0.1 ± 0.05
6.4 ± 0.3
0.15
0.5 ± 0.2
0.1
+
0.05
−
NIPPON PRECISION CIRCUITS—2
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BLOCK DIAGRAM
SM8142
■
SM8142A
EL sheet
VDD CHVLDR OUT2OUT1
High Voltage
Switching Circuit
Dividing Circuit
Oscillator for
Boosting Voltage
VSS OCL
Dividing Circuit
Oscillator for
EL Driving
OCE
■
SM8142B
EL sheet
VDD CHVLDR OUT2OUT1
High Voltage
Switching Circuit
Dividing Circuit
Boosting Voltage and EL Driving
VSS OSC
Dividing Circuit
Oscillator for
ENA
PIN DESCRIPTION
Pin number
VSOP-8 SON-8
1 7 A/B C H V I High-voltage DC input
2 8 A/ B LD R O Booster coil driver output
3 1 A/B VS S – Ground
42
53
6 4 A/B VD D – Supply
7 5 A/B OU T 2 O Output 2
8 6 A/B OU T 1 O Output 1
1. Built-in pull-down resistor
Ver. Na me I / O Function
A O CL I Coil driver oscillator (oscillator frequency determined by external resistor)
B OSC I
Coil and EL driver oscillator
(oscillator frequency determined by external resistor)
A OCE I E L d r iver oscillator (oscillator frequency determined by external resistor)
B ENA Ip
1
En a ble input (HIGH: enable, LOW: disable)
NIPPON PRECISION CIRCUITS—3
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C
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Sym bol Condition Rating Unit
Supply voltage range V
Input voltage range V
Output voltage
Po w er dissipation P
Storage temperature range T
Recommended Operating Conditions
DD
IN
V
CHV
V
LDR
V
OUT1/2
stg
All Input pins V
CHV pin 0.5 to 120 V
LDR pin 0.5 to 120 V
OUT1 , OUT2 pin 0.5 to 120 V
T
≤
85
°
D
C 100 m W
a
SM8142
−
0.3 to 7.0 V
−
SS
0.3 to V
−
+ 0.3 V
DD
55 to 125
°
Parameter Sym bol Condition
Supply voltage range V
Ope rating temperature T
Op e rating current
1
Coil inductance L
DD2
OPR
I
DD2
LDR2
Including coil current, V
Including coil current, V
f
LDR
1. Max value is as same as Absolute Maximum Ratings.
Rating
Unit
min typ ma x
1.6 3.0 5.5 V
−
40 – 85
=
3.0V – – 60
DD
=
5.0V – – 36
DD
°
mA
= 64 kHz – 0.47 – mH
C
NIPPON PRECISION CIRCUITS—4
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DC Characteristics
V
= 3.0 V, T
DD
= 25 ° C unless otherwise noted.
a
SM8142
Parameter Ver. Symbol Condition
Supply voltage A/B V
CHV output voltage A/B V
OUT1, OUT2 HIGH-level output voltage A/ B V
OUT1, OUT2 LOW-level output voltage A/B V
LDR output resistance A/B R
OCE oscillator frequency
A
OCE oscillator frequency range f
OCL oscillator frequency
A
OCL oscillator frequency range f
OSC oscillator frequency
B
OSC oscillator frequency range f
OUT1, OUT2 output frequency
A/B
OUT1, OUT2 output frequency range f
LDR inductance driver frequency
A/B
LDR inductance driver frequency range f
ENA HIGH-level input voltage
V
B
ENA LOW-level input voltage V
ENA input current B I
Op e rating current A/ B I
Stand-by current B I
DD
CHV
OUTH
OUTL
LDR
f
OCE1
OCE2
f
OCL1
OCL2
f
OSC1
OSC2
f
OUT1
OUT2
f
LDR1
LDR2
ENAH
ENAL
ENAH
DD1
STB
Rating
Unit
min typ ma x
1.6 3.0 5.5 V
0.5 – 100 V
– – 100 V
– – 0.5 V
I
= 50 mA – 8.0 12.0
LDR
R
= 180 k
OCE
Ω
205 256 307
kHz
32 – 1024
R
= 180 k
OCL
Ω
205 256 307
kHz
32 – 1024
R
= 180 k
OSC
Ω
205 256 307
kHz
32 – 1024
R
/R
= 180 k
OCE
OSC
Ω
200 250 300
Hz
31 – 1000
R
/R
= 180 k
OCL
OSC
Ω
51 64 77
kHz
8 – 256
ENA = “H”, V
ENA = “L”, V
V
ENAH
= 1.6 to 5.5V V
DD
= 1.6 to 5.5V V
DD
= V
= 3.0V 2.0 4.0 6.0
DD
– 0.5 – V
DD
– 0.3 – V
SS
DD
SS
+ 0.3
+ 0.5
µ
Excluding coil current – – 0. 5 mA
ENA = “L” – – 1.0
µ
Ω
V
A
A
NIPPON PRECISION CIRCUITS—5
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TYPICAL APPLICATIONS
■
SM8142AD
100kΩ
180kΩ
3.0V
VSS
OCL
OCE
VDD
LDR
CHV
OUT1
OUT2
SM8142
0.47mH
EL sheet
C
bypass
0.01µF
EL sheet size:5cm to 10cm
Current Consumption:15mA
0.1µF
22
100V
Diode:TOSHIBA 1SS370
Coil:RIVER ELETEC FLC32PC
1.5V
3.0V
3.0V
180kΩ
180kΩ
360kΩ
180kΩ
VSS
OCL
OCE
VDD
VSS
OCL
OCE
VDD
LDR
CHV
OUT1
OUT2
LDR
CHV
OUT1
OUT2
0.47mH
EL sheet
0.47mH
EL sheet
C
bypass
0.01µF
EL sheet size:20cm to 30cm
Current Consumption:20mA
0.1µF
100V
C
bypass
0.01µF
EL sheet size:10cm to 15cm
Current Consumption:20mA
2 2
Diode:TOSHIBA 1SS370
Coil:MURATA LQH4N471K04M00
0.1µF
100V
Diode:TOSHIBA 1SS370
Coil:MURATA LQH4N471K04M00
2 2
C
bypass
0.01µF
EL sheet size:30cm to 50cm
Current Consumption:40mA
EL sheet
2 2
0.1µF
100V
Diode:TOSHIBA 1SS370
Coil:MURATA LQH4N471K04M00
2
.
3.0V
VSS
OCL
360kΩ
OCE
180kΩ
VDD
* : Connect a 1k
Ω
0.47mH
LDR
CHV
OUT1
1kΩ*
OUT2
resistor to protect IC when the size of EL sheet is over 30cm
Note: Do not operate the SM8142 with the EL sheet NOT connected (no load to OUT1/OUT2) since the IC will be damaged.
NIPPON PRECISION CIRCUITS—6
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SM8142BD
■
3.0V
3.0V
100kΩ
180kΩ
VSS
OSC
ENA
VDD
VSS
OSC
ENA
VDD
LDR
CHV
OUT1
OUT2
LDR
CHV
OUT1
OUT2
SM8142
0.47mH
EL sheet
0.47mH
EL sheet
C
bypass
0.01µF
EL sheet size:5cm to 10cm
Current Consumption:15mA
0.1µF
100V
Diode:TOSHIBA 1SS370
Coil:RIVER ELETEC FLC32PC
C
bypass
0.01µF
EL sheet size:20cm to 30cm
Current Consumption:20mA
0.1µF
100V
2 2
Diode:TOSHIBA 1SS370
Coil:MURATA LQH4N471K04M00
22
1.5V
3.0V
180kΩ
3.0V
180kΩ
* : Connect a 1k
C
0.22mH
VSS
OSC
ENA
VDD
LDR
CHV
OUT1
OUT2
EL sheet
0.22mH
VSS
OSC
ENA
VDD
LDR
CHV
OUT1
OUT2
Ω
resistor to protect IC when the size of EL sheet is over 30cm
EL sheet
1kΩ*
bypass
0.01µF
EL sheet size:10cm to 15cm
Current Consumption:20mA
0.1µF
100V
Diode:TOSHIBA 1SS370
Coil:MURATA LQH4N221K04M00
C
bypass
0.01µF
EL sheet size:30cm to 50cm
Current Consumption:40mA
2 2
0.1µF
100V
Diode:TOSHIBA 1SS370
Coil:MURATA LQH4N221K04M00
2 2
2
.
Note: Do not operate the SM8142 with the EL sheet NOT connected (no load to OUT1/OUT2) since the IC will be damaged.
NIPPON PRECISION CIRCUITS—7
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SM8142
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to
improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for
the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits
are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision
Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or
malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,
including compliance with export controls on the distribution or dissemination of the products. Customers shall not expor t, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome
Koto-ku, To kyo 135-8430, Japan
NIPPON PRECISION CIRCUITS INC.
Telephone: 03-3642-6661
Facsimile: 03-3642-6698
NC9810HE 2000.08
NIPPON PRECISION CIRCUITS—8
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