
Block Diagram
LB1868
VCC
VIN
R1
R2
IN+
IN−
H
Constant
current
source
Thermal
shutdown
Control block
CT
C1
0.47 to 10μF
Application Circuit Example
(1) 12V supply voltage
VCC
12V
330Ω
2kΩ
H
10
9
8
7
6
VIN RD Z2 Z1 OUT2
LB1868
IN− IN+ CT OUT1 GND
1
2
3
4
5
0.47μF
L1
L2
OUT1
Z1
Z2
OUT2
RD
GND
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