Envelope-Tracking Power Supply Reference Design for Audio Power Amplifiers PMP15036 (ACTIVE)

Description & Features

Technical Documents

Support & Training

Order Now


See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document

Description

This envelope-tracking power reference design maintains helps extend battery life in a portable audio applications, such as Bluetooth® or Wi-Fi speakers. The low-power step-down converter in the design features envelope-tracking capability to an audio power amplifier, maintaining high efficiency across the output voltage range. By adding an audio envelope signal to the FB pin of TI’s TPS61178 device, the output voltage can change in accordance with the envelope of the audio signal thus dynamically adapting the TPA3128D2 power amplifier’s supply and optimizing its power consumption.

Features
  • 5.4V to 8.4V input voltage range
  • 2X20W into a 8-Ω load at Vin=7.2V
  • Programmable power limit
  • Isolate the input battery from the output side when shut down
  • High efficiency and small solution size

See the Important Notice and Disclaimer covering reference designs and other TI resources.


  



Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files


Parametrics
 PMP15036.1
(Output Voltage 1)
Vin (Min) (V)5.4
Vin (Max) (V)8.4
Vout (Nom) (V)18
Iout (Max) (A)1.5
Output Power (W)27
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBoost- Synchronous

TI Devices (3)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA4377  Low-Cost, Low Noise, 5.5MHz CMOS Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPA3128D2  2-Ch 30-W Differential Analog Input Class-D Amplifier With Low Idle Power Dissipation  Audio amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS61178  20-V Fully Integrated Sync Boost with Load Disconnect  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA4377 Download Download
TPA3128D2 Download
TPS61178 Download -

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 643 25 Sep 2017
Design files (6)
Title Type Size (KB) Date
ZIP 1103 25 Sep 2017
ZIP 1360 25 Sep 2017
PDF 714 25 Sep 2017
PDF 212 25 Sep 2017
PDF 79 25 Sep 2017
PDF 259 25 Sep 2017

Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles