TAS5711PHP Allicdata Electronics
Allicdata Part #:

296-32732-ND

Manufacturer Part#:

TAS5711PHP

Price: $ 1.00
Product Category:

Integrated Circuits (ICs)

Manufacturer: Texas Instruments
Short Description: IC AMP AUD DGTL 20W 2CH 48HTQFPAmplifier IC 2-Chan...
More Detail: N/A
DataSheet: TAS5711PHP datasheetTAS5711PHP Datasheet/PDF
Quantity: 12569
Lead Free Status / RoHS Status:
Moisture Sensitivity Level (MSL):
1 +: $ 1.00000
10 +: $ 0.97000
100 +: $ 0.95000
1000 +: $ 0.93000
10000 +: $ 0.90000
Stock 12569Can Ship Immediately
$ 1
Specifications
Series: --
Packaging: Tray 
Lead Free Status / RoHS Status: --
Part Status: Active
Moisture Sensitivity Level (MSL): --
Type: Class D
Output Type: 2-Channel (Stereo, 2.1) or 4-Channel (Quad)
Max Output Power x Channels @ Load: 21W x 2 @ 8 Ohm
Voltage - Supply: 8 V ~ 26 V
Features: Depop, Digital Inputs, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type: Surface Mount
Operating Temperature: 0°C ~ 85°C (TA)
Supplier Device Package: 48-HTQFP (7x7)
Package / Case: 48-TQFP Exposed Pad
Base Part Number: TAS5711
Description

DESCRIPTION

The TAS5711PHP is a 20-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. A fully programmable data path routes these channels to the internal speaker drivers.

The TAS5711PHP is an I2S slave-only device receiving all clocks from external sources. The TAS5711PHP operates with a PWM carrier between 384-kHz switching rate and 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.

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FEATURES

    1. Audio Input/Output

        – 20-W Into an 8-Ω Load From an 18-V Supply

        – Wide PVDD Range, From 8 V to 26 V

        – Efficient Class-D Operation Eliminates Need for Heatsinks

        – One Serial Audio Input (Two Audio Channels)

        – 2.1 Mode (2 SE + 1 BTL)

        – 2.0 Mode (2 BTL)

        – Single-Filter PBTL Mode Support

        – I2C Address Selection Pin (Chip Select) 

        – Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)

    2. Audio/PWM Processing

        – Independent Channel Volume Controls With 24-dB to Mute

        – Separate Dynamic Range Control for Satellite and Subchannels 

        – 21 Programmable Biquads for Speaker EQ and Other Audio Processing Features

        – Programmable Coefficients for DRC Filters

        – DC Blocking Filters

        – Support for 3D Effects

    3. 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 

        – Support for AD or BD Mode

    4. Benefits

        – Up to 90% Efficient

        – AD and BD Filter Mode Support

        – SNR: 106 dB, A-Weighted

        – EQ: Speaker Equalization Improves Audio Performance

        – DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables Speaker Protection, Easy Listening,Night-Mode Listening.

        – Separate DRC for Satellite and Subchannels

        – Autobank Switching: Preload Coefficients for Different Sample Rates. No Need to Write new Coefficients to the Part When Sample Rate Changes.

        – Autodetect: Automatically Detects Sample-Rate Changes. No Need for External Microprocessor Intervention

    5. Requires Only 3.3 V and PVDD

APPLICATIONS

    1. Television

    2. iPod™ Dock

    3. Sound Bar

Power supply description

To facilitate system design, the TAS5711PHP needs only a 3.3-V supply in addition to the (typical) 18-V power-stage supply. An internal voltage regulator provides suitable voltage levels for the gate drive circuitry. Additionally, all circuitry requiring a floating voltage supply, e.g., the high-side gate drive, is accommodated by built-in bootstrap circuitry requiring only a few external capacitors.

In order to provide good electrical and acoustical characteristics, the PWM signal path for the output stage is designed as identical, independent half-bridges. For this reason, each half-bridge has separate bootstrap pins

(BST_x), and power-stage supply pins (PVDD_x). The gate drive voltages (GVDD_AB and GVDD_CD) are derived from the PVDD voltage. Special attention should be paid to placing all decoupling capacitors as close to

their associated pins as possible. In general, inductance between the power-supply pins and decoupling capacitors must be avoided.

For a properly functioning bootstrap circuit, a small ceramic capacitor must be connected from each bootstrap pin (BST_x) to the power-stage output pin (OUT_x). When the power-stage output is low, the bootstrap capacitor is charged through an internal diode connected between the gate-drive regulator output pin (GVDD_x) and the bootstrap pin. When the power-stage output is high, the bootstrap capacitor potential is shifted above the output potential and thus provides a suitable voltage supply for the high-side gate driver. In an application with PWM switching frequencies in the range from 352 kHz to 384 kHz, it is recommended to use 33-nF 50-V X7R

capacitors, size 0603 or 0805, for the bootstrap supply. These 33-nF capacitors ensure sufficient energy storage, even during minimal PWM duty cycles, to keep the high-side power stage FET (LDMOS) fully turned on during

the remaining part of the PWM cycle.

Special attention should be paid to the power-stage power supply; this includes component selection, PCB placement, and routing. As indicated, each half-bridge has independent power-stage supply pins (PVDD_x). For optimal electrical performance, EMC compliance, and system reliability, it is important that each PVDD_x pin is decoupled with a 100-nF ceramic capacitor placed as close as possible to each supply pin.

The TAS5711 is fully protected against erroneous power-stage turnon due to parasitic gate charging.

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