SM8143 데이터 시트보기 (PDF) - Nippon Precision Circuits
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SM8143 Datasheet PDF : 8 Pages
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BLOCK DIAGRAM
SM8143A
EL sheet
< 80cm2
VDD
LDR
CHV
OUT1 OUT2
Boosting Block
Switching Circuit
Dividing Circuit
1/4
Dividing Circuit
1/1024
VSS ENA
Oscillator for
Boosting
Oscillator for
EL driving
OCL
Oscillation Block
ROCL
OCE
ROCE
ENA from microcontroller
When ENA is logical "H", SM8143A is active.
Note: Brightness and operating current are adjusted with ROCL .
EL driving frequency is adjusted with ROCE .
PIN DESCRIPTION
Pin number
VSOP-16 SON-10
1
8
2
10
3
–
4
9
5
–
6
1
7
–
8
2
9
3
10
4
11
5
12
–
13
6
14
–
15
7
16
–
Name
NC
CHV
NC
LDR
NC
VSS
NC
OCL
OCE
ENA
VDD
NC
OUT2
NC
OUT1
NC
I/O
Function
–
No connection (must be open)
I
High-voltage DC input
–
No connection (must be open)
O
Booster coil driver output
–
No connection (must be open)
–
Ground
–
No connection (must be open)
I
Coil driver oscillator (oscillator frequency determined by external resistor)
I
EL driver oscillator (oscillator frequency determined by external resistor)
I
Enable input (built-in pull-down resistor)
–
Supply
–
No connection (must be open)
O
Output 2
–
No connection (must be open)
O
Output 1
–
No connection (must be open)
SEIKO NPC CORPORATION —3
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