ML4876CR MICRO-LINEAR [Micro Linear Corporation], ML4876CR Datasheet - Page 6

• Manufacturer Part Number: ML4876CR
• Description: LCD Backlight Lamp Driver with Contrast
• Manufacturer: MICRO-LINEAR [Micro Linear Corporation]

ML4876
6
(ADJUSTABLE)
CONTRAST
–20V MAX.
VOLTAGE
R2
1.6M
22 F
R3
100k
25V
C11
0.1 F
C1
+
D1
INPUT 5V to 18V
T3
R12
Q1
22 F
25V
200k
C2
R4
CONTRAST
+
ADJUST
Q3
R5
200k
Figure 1. ML4876 Typical Application Schematic
0.47 F
C3
1.0 F
C5
20
1
750k
10V
D3
R1
19
2
Q2
18
3
+
LON
17
4
C4
10 F
16V
ML4876
NOTE 1
16
5
5V REF
ON/OFF
15
C9
0 1 F
C8, 0.1 F
6
14
7
1N5817
47pF
13
8
C7
1N4148
U2-A
12
9
D2
11
10
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.
47 F
T2
C6
BRIGHTNESS
U2-B
4.3k
ADJUST
R8
R7
1.6M
200k
C12, 0.1 F
R6
Q4
T1
R16
L1
Q5
C10
39pF
1kV