Sharp LC-32LE631E Service Manual page 85
Led lcd colour television
dvb-t/t2 / dvb-c, pal b/g, i / secam b/g, d/k, l/l’ system colour television
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Also See for LC-32LE631E:
- Information manual (57 pages) ,
- Operation manual (55 pages) ,
- Quick start manual (24 pages)
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IC Data Sheets (continued)
8.12 Diagram
DVBS supply
Block diagram
CLK1
GND
4
FB1
7
0.8 V
REF
Soft Start
1
VDD2
6 A
EN1
5
EN2
6
150 k
SEQ
10
150 k
CLK2
GND
4
FB2
8
0.8 V
REF
Soft Start
2
BP
11
150 k
ILIM2
9
150 k
B08A, TPS54283PWP (IC 7T03)
Level
Shift
Current
f(I
) + DC(ofst)
Comparator
DRAIN1
+
f(I
+
R
f(I
COMP
SLOPE1
SD1
C
COMP
TSD
6 A
Internal
Control
BP
FB1
Output
Undervoltage
Detect
FB2
Level
Shift
Current
Comparator
f(I
) + DC(ofst)
DRAIN2
+
+
R
COMP
SD2
C
COMP
5.25-V
PVDD2
Regulator
BP
Level
Select
0.8 V
References
I
MAX2
Figure 8-12 Internal block diagram and pin configuration
BP
S
Q
R
R
Q
+
)
DRAIN1
Overcurrent Comp
)
f(I
)
MAX1
CLK1
1.2 MHz
Divide
Oscilator
by 2/4
SD1
SD2
UVLO
BP
S
Q
R
R
Q
+
f(I
)
DRAIN2
Overcurrent Comp
f(I
)
f(I
)
SLOPE2
MAX2
CLK2
REF
(Set to one of two limits)
85
LC-32LE631
LC-40LE631
LC-46LE631
2
BOOT1
1
PVDD1
3
SW1
BP
Weak
Pull-Down
Anti-Cross
MOSFET
Conduction
f(I
)
SLOPE1
Ramp
Gen 1
CLK1
f(I
)
SLOPE2
Ramp
Gen 2
CLK2
13
BOOT2
14
PVDD2
FET
Switch
12
SW2
BP
Weak
Pull-Down
Anti-Cross
MOSFET
Conduction
UDG-07007
18770_305_100217.eps
100217
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