General Description; Features - Hitachi 32LD8700C Service Manual

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
SCL 11 I
SIOMA 12 sound intercarrier output and MAD select
n.c. 13 not connected
TAGC 14 tuner AGC output
REF 15 4MHz 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
VP 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 / TPA3004D2

11.29.1. General Description

The TPA3002D2/TPA3004D2 is a 9W/12W (per channel) efficient, Class-D audio amplifier for
driving bridged-tied stereo speakers. These devices can drive stereo speakers as low as 8 Ohm
for (TPA3002D2) / 4 Ohm for (TPA3004D2).
The high efficiency of these devices 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 5v regulated supply is provided for powering an external headphone amplifier.

11.29.2. Features

• 9W/Ch into an 8 Ohm Load from 12v Supply
12W/Ch into an 8 Ohm Load from 15v Supply
• Efficient, Class-D Operation Eliminates
• Heatsinks and Reduces Power Supply Requirements
• 32 Step DC Volume Control From -40dB to 36dB
• Line Outputs for External Headphone Amplifier with Volume Control
• Regulated 5v Supply Output for Powering TPA6110A2
• Space-Saving, Thermally-Enhanced PowerPAD™ Packaging
•
Thermal and Short-Circuit Protection
Applications
• LCD Monitors and TVs
• Powered Speakers
TFT TV Service Manual
2
C bus data input/output
2
C bus clock input
29