sm8143a Seiko NPC Corp., sm8143a Datasheet - Page 3

• Manufacturer Part Number: sm8143a
• Description: El Driver Ic Up To 80cm2
• Manufacturer: Seiko NPC Corp.

BLOCK DIAGRAM
PIN DESCRIPTION
VSOP-16
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Pin number
SON-10
10
8
–
9
–
1
–
2
3
4
5
–
6
–
7
–
Name
OUT2
OUT1
CHV
OCE
VDD
LDR
VSS
OCL
ENA
NC
NC
NC
NC
NC
NC
NC
Note: Brightness and operating current are adjusted with R
Boosting Block
I/O
EL driving frequency is adjusted with R
VDD
VSS
O
O
O
–
–
–
–
–
–
–
–
–
I
I
I
I
ENA
No connection (must be open)
High-voltage DC input
No connection (must be open)
Booster coil driver output
No connection (must be open)
Ground
No connection (must be open)
Coil driver oscillator (oscillator frequency determined by external resistor)
EL driver oscillator (oscillator frequency determined by external resistor)
Enable input (built-in pull-down resistor)
Supply
No connection (must be open)
Output 2
No connection (must be open)
Output 1
No connection (must be open)
Dividing Circuit
SM8143A
Oscillator for
R
ENA from microcontroller
When ENA is logical "H", SM8143A is active.
OCL
LDR
Boosting
1/4
OCL
Oscillation Block
CHV
OCE
Switching Circuit
Dividing Circuit
Oscillator for
EL driving
.
EL sheet
OUT1
<
1/1024
80cm
Function
OCE
R
OCE
2
OCL
OUT2
.
SEIKO NPC CORPORATION —3