Sharp LC-26SB25E, Руководство по обслуживанию

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2008-03-14
LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
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1.6. U600 (TDA8932BTW HTSSOP32)
General description
The TDA8932B is a high-efficiency class D amplifier with low power dissipation.
The continuous-time output power is 2
×
15 W in a stereo half-bridge application (R
L
= 4
Ω
) or 1
×
30 W in a mono full-bridge application (R
L
=8
Ω
). Due
to the low power dissipation the device can be used without any external heat sink when playing music. Due to the implementation of thermal foldback,
even for high supply voltages and/or lower load impedances, the device remains operating with considerable music output power without the need for an
external heat sink.
The device has two full differential inputs driving two independent outputs. It can be used in a mono full-bridge configuration (Bridge-Tied Load - BTL) or a
stereo half-bridge configuration (Single-Ended - SE).
Features
·
Operating voltage from 10 V to 36 V asymmetrical or
±
5 V to
±
18 V symmetrical
·
Mono bridge-tied load (full-bridge) or stereo single-ended (half-bridge) application
·
Application without heat sink using thermally enhanced small-outline package
·
High efficiency and low-power dissipation
·
Thermally protected and thermal foldback
·
Current limiting to avoid audio holes
·
Full short-circuit proof across load and to supply lines (using advanced current protection)
·
Switchable internal or external oscillator (master-slave setting)
·
No pop noise
·
Full differential inputs
Applications
·
Flat-panel television sets
·
Flat-panel monitor sets
·
Multimedia systems
·
Wireless speakers
·
Mini/micro systems
·
Home sound sets
1.7. U603 (RC4580IPWR TSSOP8)
Features
·
Operating Voltage . . .
±
2 V to
±
18 V
·
Low Noise Voltage . . . 0.8
μ
Vrms (TYP)
·
Wide GBW . . . 12 MHz (TYP)
·
Low THD . . . 0.0005% (TYP)
·
Slew Rate . . . 5 V/
μ
s (TYP)
·
Suitable for Applications Such As Audio Preamplifier, Active Filter, Headphone Amplifier, Industrial Measurement Equipment
·
Drop-In Replacement for NJM4580
·
Pin and Function Compatible With LM833, NE5532, NJM4558/9, and NJM4560/2/5
1.8. U231 (MT5133AN QFN-48)
General Description
MT5133AN is MediaTek’s 2nd generation COFDM (Coded Orthogonal Frequency Division Multiplex) channel demodulator for DVB-T receiver. It is fully
compliant with the DVB-T specification (ETSI 300744) and Nordig Unified. MT5133AN implements the functions from tuner IF output to MPEG-2 transport
stream input. The device can support 2K, 4K or 8K mode with 6, 7, 8MHz channel. By integrating high performance A/D converters into the chip,
MT5133AN can accept first or second IF signal from conventional tuner thus eliminating the need for an external down-converter. Pure digital
synchronization, advance channel estimation and equalization guarantee the wide acquisition range of MT5133AN. User can easily access on-chip
information, including signal-to-noise ratio, Bit Error Rate (BER) before and after Viterbi decoder. Serial or parallel MPEG transport stream output can be
interfaced to all commonly available backend processor chips.
Features
·
ETSI 300 744 and Nordig Unified compliant
·
Suitable for Single Frequency Network (SFN) operation
·
Support 2K, 4K, 8K modes
·
Support QPSK,16QAM ,64QAM constellations
·
1/4,1/8,1/16,1/32 Guard interval
·
Support hierarchical & non-hierarchical modes
·
Automatic mode detection
·
Full-digital timing/frequency with wide acquisition range