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TFT TV Service Manual 11/04/2006
DEEM
5
de-emphasis output for capacitor
AFD
6
AF decoupling input for capacitor
DGND
7
digital ground
AUD
8
audio output
TOP
9
tuner AGC TakeOver Point (TOP)
SDA
10
I
2
C-bus data input/output
SCL
11
I
2
C-bus clock input
SIOMA
12
sound intercarrier output and MAD select
n.c.
13
not connected
TAGC
14
tuner AGC output
REF
15
4 MHz crystal or reference input
VAGC
16
VIF-AGC for capacitor; note 1
CVBS
17
video output
AGND
18
analog ground
VPLL
19
VIF-PLL for loop filter
V
P
20
supply voltage (+5 V)
AFC
21
AFC output
OP2
22
output 2 (open-collector)
SIF1
23
SIF differential input 1
SIF2
24
SIF differential input 2
11.29. TPA3002D2
11.29.1. General
Description
The TPA3002D2 is a 9-W (per channel) efficient, Class-D audio amplifier for driving bridged-tied
stereo speakers. The TPA3002D2 can drive stereo speakers as low as 8 O. The high efficiency of the
TPA3002D2 eliminates the need for external heatsinks when playing music.
Stereo speaker volume is controlled with a dc voltage applied to the volume control terminal
offering a range of gain from -40 dB to 36 dB. Line outputs, for driving external headphone amplifier
inputs, are also dc voltage controlled with a range of gain from -56 dB to 20 dB.
An integrated 5-V regulated supply is provided for powering an external headphone amplifier.
11.29.2. Features
•
9-W/Ch into an 8-Q Load from 12-V Supply
•
Efficient, Class-D Operation Eliminates
Heatsinks and Reduces Power Supply
Requirements
•
32-Step DC Volume Control From -40 dB to
36 dB
•
Line Outputs for External Headphone
Amplifier with Volume Control
•
Regulated 5-V Supply Output for Powering
TPA6110A2
•
Space-Saving,
Thermally-Enhanced
PowerPAD™ Packaging
•
Thermal and Short-Circuit Protection
Applications
•
LCD Monitors and TVs
•
Powered
Speakers
