SM8143A
SEIKO NPC CORPORATION —1
EL Driver
OVERVIEW
The SM8143A is a transformer-less electroluminescent (EL) driver IC, capable of driving displays up to
80cm
2
(SM8143AV) or 70cm
2
(SM8143AD) in size. It is a high-efficiency driver that features revised coil
switching transistor ON resistance and output circuit configuration to reduce loss. The EL drive frequency and
coil drive frequency can be controlled independently, making the driver circuit optimizable to match applica-
tion requirements. A microcontroller interface pin (ENA) is provided, which can be used to control the EL
driver ON/OFF function.
FEATURES
■
Dedicated EL driver
■
1.6 to 5.5V supply voltage
■
Maximum operating current
• SM8143AV: 150mA max.
(V
DD
= 3.0V, Ta
≤
70
°
C)
• SM8143AD: 100mA max.
(V
DD
= 3.0V, Ta
≤
70
°
C)
■
3.5
Ω
typical output resistance
■
200Vp-p maximum EL driver voltage*
■
31 to 1500Hz EL drive frequency range*
■
High voltage CMOS Process
■
Package: VSOP-16, SON-10
*: Adjustable with external resistance.
APPLICATIONS
■
Cellular phone
■
Mobile equipment
■
PDA
ORDERING INFORMATION
PINOUT
(Top view)
■
VSOP-16
■
SON-10
Device Package
SM8143AV VSOP-16
SM8143AD SON-10
NC 1
CHV
NC
LDR
16 NC
OUT1
NC
OUT2
NC
VSS
NC
OCL 8
NC
VDD
ENA
9OCE
CHV
LDR
NC
OUT1
OUT2
VSS
OCL
OCE
ENA
VDD 6
1
2
3
4
5
10
9
8
7
6
SM8143A
SEIKO NPC CORPORATION —2
PACKAGE DIMENSIONS
(Unit: mm)
■
VSOP-16
■
SON-10
6.4 ± 0.2
4.4 ± 0.2
0.275TYP
5.1 ± 0.2
0.65
0.12
0.10
M
0.22 − 0.05
+ 0.1
1.15 ± 0.1
0.10 ± 0.05
0.15 − 0.05
+ 0.1
0.5 ± 0.2
0 to 10 °
TOP VIEW
10 6
51
3.10 ± 0.1
2.85 ± 0.1
0.75 ± 0.05
0.05
0.05 ± 0.02
0.1 ± 0.03
BOTTOM VIEW
0.15 ± 0.08
0.4 ± 0.1
1.6 ± 0.08
0.3 ± 0.080.1 ± 0.08
0.3 ± 0.05
0.15 ± 0.08
R0.075
0.65 ± 0.1
0.35 ± 0.08
SM8143A
SEIKO NPC CORPORATION —3
BLOCK DIAGRAM
PIN DESCRIPTION
Note: Brightness and operating current are adjusted with R
OCL
.
EL driving frequency is adjusted with R
OCE
.
Pin number
Name I/O Function
VSOP-16 SON-10
1 8 NC – No connection (must be open)
2 10 CHV I High-voltage DC input
3 – NC – No connection (must be open)
4 9 LDR O Booster coil driver output
5 – NC – No connection (must be open)
6 1 VSS – Ground
7 – NC – No connection (must be open)
8 2 OCL I Coil driver oscillator (oscillator frequency determined by external resistor)
9 3 OCE I EL driver oscillator (oscillator frequency determined by external resistor)
10 4 ENA I Enable input (built-in pull-down resistor)
11 5 VDD – Supply
12 – NC – No connection (must be open)
13 6 OUT2 O Output 2
14 – NC – No connection (must be open)
15 7 OUT1 O Output 1
16 – NC – No connection (must be open)
VSS OCL OCE
VDD CHVLDR OUT2OUT1
Oscillator for
Boosting
Switching Circuit
Dividing Circuit
1/4
Oscillator for
EL driving
Dividing Circuit
1/1024
ENA
Boosting Block
ENA from microcontroller
When ENA is logical "H", SM8143A is active.
ROCL ROCE
Oscillation Block
EL sheet
80cm2
<
SM8143A
SEIKO NPC CORPORATION —4
SPECIFICATIONS
Absolute Maximum Ratings
Recommended Operating Conditions
Parameter Symbol Condition Rating Unit
Supply voltage range V
DD
−
0.3 to 7.0 V
Input voltage range V
IN
All input pins V
SS
−
0.3 to V
DD
+ 0.3 V
Output voltage
V
CHV
CHV pin 0.5 to 120 V
V
LDR
LDR pin 0.5 to 120 V
V
OUT1/2
OUT1, OUT2 pin 0.5 to 120 V
Power dissipation P
D
SM8143AV (VSOP-16)
Ta
≤
70
°
C 200 mW
Ta
≤
85
°
C 140 mW
SM8143AD (SON-10)
Ta
≤
70
°
C 140 mW
Ta
≤
85
°
C 100 mW
Storage temperature range T
STG
−
55 to 125
°
C
Parameter Symbol Condition
Rating
Unit
min typ max
Supply voltage range V
DD2
1.6 3.0 5.5 V
Operating temperature T
OPR
−
40 – 85
°
C
Operating current
1
1. Max value is as same as Absolute Maximum Ratings.
I
DD2
SM8143AV
(VSOP-16)
Including coil
current
V
DD
=
3V
Ta
≤
70
°
C – – 150 mA
Ta
≤
85
°
C – – 105 mA
V
DD
=
5V
Ta
≤
70
°
C – – 100 mA
Ta
≤
85
°
C– – 70 mA
SM8143AD
(SON-10)
Including coil
current
V
DD
=
3V
Ta
≤
70
°
C – – 100 mA
Ta
≤
85
°
C– – 70 mA
V
DD
=
5V
Ta
≤
70
°
C– – 60 mA
Ta
≤
85
°
C– – 42 mA
Coil inductance L
LDR
f
LDR
= 64kHz – 0.47 – mH
SM8143A
SEIKO NPC CORPORATION —5
DC Characteristics
V
DD
= 3.0V, Ta = 25
°
C unless otherwise noted.
Parameter Symbol Condition
Rating
Unit
min typ max
Supply voltage V
DD
1.6 3.0 5.5 V
CHV output voltage V
CHV
0.5 – 100 V
OUT1, OUT2 HIGH-level output voltage V
OUTH
– – 100 V
OUT1, OUT2 LOW-level output voltage V
OUTL
– – 0.5 V
LDR output resistance R
LDR
I
LDR
= 50mA – 3.5 5.25
Ω
OCE oscillator frequency f
OCE1
R
OCE
= 180k
Ω
205 256 307
kHz
OCE oscillator frequency range f
OCE2
32 – 1536
OCL oscillator frequency f
OCL1
R
OCL
= 180k
Ω
205 256 307
kHz
OCL oscillator frequency range f
OCL2
32 – 1536
OUT1, OUT2 output frequency f
OUT1
R
OCE
= 180k
Ω
200 250 300
Hz
OUT1, OUT2 output frequency range f
OUT2
31 – 1500
LDR inductance driver frequency f
LDR1
R
OCL
= 180k
Ω
51 64 77
kHz
LDR inductance driver frequency range f
LDR2
8 – 384
ENA HIGH-level input voltage V
ENAH
ENA = HIGH, V
DD
= 1.6 to 5.5V V
DD
– 0.5 – V
DD
+ 0.3
V
ENA LOW-level input voltage V
ENAL
ENA = LOW, V
DD
= 1.6 to 5.5V V
SS
– 0.3 – V
SS
+ 0.5
ENA input current I
ENAH
V
ENAH
= V
DD
= 3.0V 2.0 4.0 6.0
µ
A
ENA rise time
1
1.
t
ENA
– – 100
µ
s
Operating current I
DD1
Excluding coil current – – 1.0 mA
Stand-by current I
STB
ENA = LOW – – 1.0
µ
A
tENA
VSS
VDD
VDD − 0.5
VSS + 0.5
ENA
SM8143A
SEIKO NPC CORPORATION —6
TYPICAL APPLICATIONS
■
EL sheet size: 20 to 30cm
2
, Current consumption: 20mA
■
EL sheet size: 30 to 50cm
2
, Current consumption: 40mA
■
EL sheet size: 50 to 100cm
2
, Current consumption: 80mA
Note: Do not operate the SM8143A with the EL sheet NOT connected (no load to OUT1/OUT2) since the IC will be damaged.
NC
VDD
NC
470µH
180kΩ
EL sheet
0.1µF
100V
3.0V
CHV
NC
LDR
NC
VSS
NC
OCL
OUT1
NC
OUT2
NC
ENA
OCE
0.01µF
180kΩ
Diode: TOSHIBA 1SS403
Coil: MURATA LQH43MN471J03
470µH
180kΩ
0.1µF
100V
3.0V
0.01µF
EL sheet
NC
VDD
NC
CHV
NC
LDR
NC
VSS
NC
OCL
OUT1
NC
OUT2
NC
ENA
OCE
360kΩ
Diode: TOSHIBA 1SS403
Coil: MURATA LQH43MN471J03
330µH
180kΩ
0.1µF
100V
3.0V
0.01µF
EL sheet
NC
VDD
NC
CHV
NC
LDR
NC
VSS
NC
OCL
OUT1
NC
OUT2
NC
ENA
OCE
510kΩ
Diode: TOSHIBA 1SS403
Coil: TOKO D73LC (817CE331M)
SM8143A
SEIKO NPC CORPORATION —7
FOOTPRINT
The optimum footprint varies depending on the board material, soldering paste, soldering method, and equip-
ment accuracy, all of which need to be considered to meet design specifications.
(Unit: mm)
■VSOP-16
■SON-10
• Footprint pattern • Metalmask pattern
Package b2 L2 e el
VSOP-16 0.55 0.95 0.65 5.90
eb2
L2 L2
b2
e1
1.60
2.25
3.25
0.50
0.35
3.30
0.65
ç
3.15
2.35
1.60
0.65 0.35
0.40
0.90
3.30
1.151.15
SM8143A
SEIKO NPC CORPORATION —8
NC9923CE 2006.06
Please pay your attention to the following points at time of using the products shown in this document.
The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on
human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such
use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and
harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right
to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that
the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties.
Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document.
Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products,
and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or
modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in
compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested
appropriately take steps to obtain required permissions or approvals from appropriate government agencies.
SEIKO NPC CORPORATION
15-6, Nihombashi-kabutocho, Chuo-ku,
Tokyo 103-0026, Japan
Telephone: +81-3-6667-6601
Facsimile: +81-3-6667-6611
http://www.npc.co.jp/
Email: sales@npc.co.jp
