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3. AUDIO AMPLIFIER STAGES
A. MAIN AMPLIFIER (TAS5719)(6-8 W option)
a. General Description
The TAS5717/TAS5719 is a 10-W/15-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 of input data and data rates. A fully
programmable data path routes these channels to the internal speaker drivers.
The TAS5717/9 is a slave-only device receiving all clocks from external sources. The
TAS5717/TAS5719 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.
b. Features
• Audio Input/Output
•
TAS5717 Supports 2×10 W and TAS5719 Supports 2×15 W Output
•
Wide PVDD Range, From 4.5 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
•
Programmable Two-Band Dynamic Range Control
•
14 Programmable Biquads for Speaker EQ
•
Programmable Coefficients for DRC Filters
•
DC Blocking Filters
•
0.125-dB Fine Volume Support
• General Features
•
Serial Control Interface Operational Without MCLK
•
Factory-Trimmed Internal Oscillator for Automatic Rate Detec
•
Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
•
AD, BD, and Ternary PWM-Mode Support
•
Thermal and Short-Circuit Protection
23
LC-22LE250
LC-24LE250
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