SM8142 Datasheet, PDF (3/8 Pages) Nippon Precision Circuits Inc – EL Sheet Driver

BLOCK DIAGRAM
I SM8142A
SM8142
EL sheet
I SM8142B
EL sheet
VDD
LDR
CHV
OUT1 OUT2
High Voltage
Switching Circuit
VDD
LDR
CHV
OUT1 OUT2
High Voltage
Switching Circuit
Dividing Circuit
Dividing Circuit
Oscillator for
Boosting Voltage
VSS
OCL
Oscillator for
EL Driving
OCE
Dividing Circuit
Dividing Circuit
Oscillator for
Boosting Voltage and EL Driving
VSS
OSC
ENA
PIN DESCRIPTION
Pin number
V e r.
Name
VSOP-8 SON-8
1
7
A/B
CHV
2
8
A/B
LDR
3
1
A/B
VSS
A
OCL
4
2
B
OSC
A
5
3
B
6
4
A/B
7
5
A/B
8
6
A/B
1. Built-in pull-down resistor
OCE
ENA
VDD
OUT2
OUT1
I/O
Function
I
High-voltage DC input
O
Booster coil driver output
–
Ground
I
Coil driver oscillator (oscillator frequency determined by external resistor)
I
Coil and EL driver oscillator
(oscillator frequency determined by external resistor)
I
EL driver oscillator (oscillator frequency determined by external resistor)
Ip¹ Enable input (HIGH: enable, LOW: disable)
–
Supply
O
Output 2
O
Output 1
NIPPON PRECISION CIRCUITS—3