ML4876
INPUT 5V to 18V
T3
CONTRAST
VOLTAGE
–20V MAX.
(ADJUSTABLE)
D1
C2 +
22µF
25V
C3
1.0µF
R1
750kΩ
Q1
C1 +
22µF
25V
R2
1.6MΩ
Q2
NOTE 1
5V REF
C4
10µF
16V
D2
1N4148
C12, 0.1µF
C10
39pF
1kV
T1
U2-A
L1
R12
D3
10V
+
T2
C9
0.1µF
1N5817
R3
100kΩ
Q3
C8, 0.1µF
Q4
Q5
C11
0.1µF
20
19
18
17
16
15
14
13
12
11
R16
ML4876
1
R4
200kΩ
C5
C6
0.47µF
47µF
R5
200kΩ
C7
47pF
2
3
4
5
6
7
8
9
10
R8
4.3kΩ
R6
200kΩ
R7
1.6MΩ
CONTRAST
ADJUST
LON
ON/OFF
BRIGHTNESS
ADJUST
NOTE 1
R1, D3, Q2 ARE OPTIONAL AND ALLOWS A BATTERY
VOLTAGE RANGE FROM 7V TO 28V. REMOVING THESE
COMPONENTS AND CONNECTING DIRECTLY TO THE
INPUT VOLTAGE ALLOWS 5.0 TO 18V.
Figure 1. ML4876 Typical Application Schematic
6
LAMP
U2-B