Sharp LC-19LE430E Service Manual page 68

LC-19LE430E/UK, LC-22LE430E/UK, LC-26LE430E/UK, LC-32LE430E/UK
■ Wide symbol rate support: 1 to 7 Msps
■ Supporting 16-, 32-, 64-, 128-, and 256-QAM
■ Full-digital timing/frequency with wide acquisition range
■ Automatic symbol rate and modulation type detection for fast channel scan
■ Excellent narrow-band interference rejection capability
Applications
■ Set-top boxes
■ Integrated digital televisions (iDTV)
■ Network Interface Modules (NIMs)
1.4 U602 (TAS5717L 10W HTQFP-48)
FEATURES
· Audio Input/Output
–7 W Into an 8-Ω Load From a 12-V Supply
–Wide PVDD Range, From 8 V to 26 V
–Efficient Class-D Operation Eliminates Need for Heatsinks
–Requires Only 3.3 V and PVDD
–One Serial Audio Input (Two Audio Channels)
–I2C Address Selection via PIN (Chip Select)
–Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
–External Headphone-Amplifier Shutdown Signal
–Integrated CAP-Free Headphone Amplifier
–Stereo Headphone (Stereo 2-V RMS Line Driver) Outputs
· Audio/PWM Processing
–Independent Channel Volume Controls With 24-dB to Mute
–DC Blocking Filters
· General Features
–Serial Control Interface Operational Without MCLK
–Factory-Trimmed Internal Oscillator for Automatic Rate Detection
–Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
–Thermal and Short-Circuit Protection
· Benefits
–DirectPath Technology: Eliminates Bulky DC Blocking Capacitors
–Stereo Headphone/Stereo Line Drivers: Adjust Gain via External Resistors, Dedicated Active Headpone Mute Pin, High Signal-to-Noise Ratio
–Two-Band DRC: Set Two Different Thresholds for Low- and High-Frequency Content
–Volume Control: Soft Volume
DESCRIPTION
The TAS5717L is a 7-W, efficient, digital audio-power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two
discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data
and data rates.
The TAS5717L is a slave-only device receiving all clocks from external sources. The TAS5717L operates with a PWM carrier between a 384-kHz
switching rate and a 352-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat
noise floor and excellent dynamic range from 20 Hz to 20 kHz.
1.5 U601 (WM8524GEDT/R TSSOP-16 WOLFSON)
DESCRIPTION
The WM8524 is a stereo DAC with integral charge pump and hardware control interface. This provides 2Vrms line driver outputs using a single 3.3V power
supply rail.
The device features ground-referenced outputs and the use of a DC servo to eliminate the need for line driving coupling capacitors and effectively liminate
power on pops and clicks.
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