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Part Name
Description
MC34271FB View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
MC34271FB
Liquid Crystal Display and Backlight Integrated Controller
ON Semiconductor
MC34271FB Datasheet PDF : 12 Pages
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MC34271
Figure 12. Auxiliary Supply Configuration
SW1
32
DS1
1
EN1
ÎÎÎ
26
VDD
8 Drv1
÷
2
31 Sync
Circuit #1 Bias Supply
En
S
Q
R
÷
N
OSC
D1
7
S1
6
ELD
9
VDD
11
Mode
169 k
30 RT
Vref
27
1.25 V
2
Ref1
12 V
VB
3
FB1
4 Comp1
SS1
5
LCD
Contrast
DAC
Ref2
23
22 FB2
Comp2
21
SS2
20
10
D2
18
S
Q
S2 19
R
En
ÎÎÎ
VDD
VDD2
Circuit #2
Bias Supply
VB
17
V0
16
DS2
24
V1
15
25 EN2
VA
28
BIAS
Gnd
29
V2
14
VDD2
V3
13
VDD2
V4
12
12 V
– 27 V
VDD
5.0 V to 16 V
VB
6.0 V to 30 V
V0
V1
V2
V3
LCD
Display
V4
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