Sharp LC-40LE531E (serv.man2) Service Manual ▷ View online
25
LC-32LE511
LC-40LE511
LC-40LE531
LC-32LE511
LC-40LE511
LC-40LE531
d. Recommended Operating Conditions
e. Pin Functions
.
PIN
I/O/P
DESCRIPTION
Pin
NAME
Number
Shutdown
logic
input
for
audio
amp
(LOW
=
outputs
Hi-Z,
HIGH
=
outputs
SD
1
I
enabled).
TTL
logic
levels
with
compliance
to
AVCC.
Open
drain
output
used
to
display
short
circuit
or
dc
detect
fault
status.
Voltage
compliant
to
AVCC. Short
circuit
faults
can
be
set
to
auto-recovery
by
connecting
FAULT
2
O
FAULT pin to SD pin. Otherwise, both short circuit faults and dc detect faults must
be reset by cycling PVCC.
LINP
3
I
Positive audio input for left channel. Biased at 3V.
LINN
4
I
Negative audio input for left channel. Biased at 3V.
GAIN0
5
I
Gain select least significant bit. TTL logic levels with compliance to AVCC.
GAIN1
6
I
Gain select most significant bit. TTL logic levels with compliance to AVCC.
AVCC
7
P
Analog supply
AGND
8
Analog signal ground. Connect to the thermal pad.
High-side FET gate drive supply. Nominal voltage is 7V. Also should be used as
High-side FET gate drive supply. Nominal voltage is 7V. Also should be used as
GVDD
9
O
supply for PLIMIT function
Power limit level adjust. Connect a resistor divider from GVDD to GND to set
Power limit level adjust. Connect a resistor divider from GVDD to GND to set
PLIMIT
10
I
power limit. Connect directly to GVDD for no power limit.
RINN
11
I
Negative audio input for right channel. Biased at 3V.
RINP
12
I
Positive audio input for right channel. Biased at 3V.
NC
13
Not connected
PBTL
14
I
Parallel BTL mode switch
Power supply for right channel H-bridge. Right channel and left channel power
Power supply for right channel H-bridge. Right channel and left channel power
PVCCR
15
P
supply inputs are connect internally.
Power supply for right channel H-bridge. Right channel and left channel power
Power supply for right channel H-bridge. Right channel and left channel power
PVCCR
16
P
supply inputs are connect internally.
BSPR
17
I
Bootstrap I/O for right channel, positive high-side FET.
OUTPR
18
O
Class-D H-bridge positive output for right channel.
PGND
19
Power ground for the H-bridges.
OUTNR
20
O
Class-D H-bridge negative output for right channel.
BSNR
21
I
Bootstrap I/O for right channel, negative high-side FET.
BSNL
22
I
Bootstrap I/O for left channel, negative high-side FET.
OUTNL
23
O
Class-D H-bridge negative output for left channel.
PGND
24
Power
ground
for
the
H-bridges
.
OUTPL
25
O
Class-D H-bridge positive output for left channel.
BSPL
26
I
Bootstrap I/O for left channel, positive high-side FET.
Power supply for left channel H-bridge. Right channel and left channel power
Power supply for left channel H-bridge. Right channel and left channel power
PVCCL
27
P
supply inputs are connect internally.
Power supply for left channel H-bridge. Right channel and left channel power
Power supply for left channel H-bridge. Right channel and left channel power
PVCCL
28
P
supply
inputs
are
connect
internally.
Copyright © 2009, Texas Instruments Incorporated
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5
Product Folder Link(s) :
TPA3110D2
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LC-32LE511
LC-40LE511
LC-40LE531
9
B. LINE-OUT and HEAD-PHONE AMPLIFIER STAGE (CXA3813N)
a. Functional Block Diagram
b. Absolute Ratings
c. Recommended Operating Conditions
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LC-32LE511
LC-40LE511
LC-40LE531
LC-32LE511
LC-40LE511
LC-40LE531
10
d. Pin Functions
C. SUBWOOFER AMPLIFIER STAGE (TPA3112)
a. General Description
The TPA3112D1 is a 25-W efficient, Class-D audio power amplifier for driving a bridge tied
speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead
filters at the outputs while meeting EMC requirements. SpeakerGuard speaker protection
system includes an adjustable power limiter and a DC detection circuit. The adjustable power
limiter allows the user to set a "virtual" voltage rail lower than the chip supply to limit the
amount of current through the speaker. The DC detect circuit measures the frequency and
amplitude of the PWM signal and shuts off the output stage if the input capacitors are
damaged or shorts exist on the inputs. The TPA3112D1 can drive a mono speaker as low as
4����������������������������������������������� eliminates the need for an external heat
sink when playing music. The outputs are fully protected against shorts to GND, VCC, and
output-to-output. The short-circuit protection and thermal protection includes an auto-
recovery feature.
b. Features
• 25-W into an 8-���������������������������������������
• 20-W into an 4-�������at 10% THD+N From a12-V Supply
• 94% Efficient Class-D Operation into 8-������������������������������������
• Wide Supply Voltage Range Allows Operationfrom 8 to 26 V
• Filter-Free Operation
• SpeakerGuard™ Speaker Protection IncludesAdjustable Power Limiter plus DC Protection
• Flow Through Pin Out Facilitates Easy BoardLayout
• Robust Pin-to-Pin Short Circuit Protection andThermal Protection with Auto-Recovery
Option
• Excellent THD+N/ Pop Free Performance
• Four Selectable, Fixed Gain Settings
• Differential Inputs
28
LC-32LE511
LC-40LE511
LC-40LE531
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c. Absolute Ratings
d. Recommended Operating Conditions
e. Pin Functions
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