TPA3156D2

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70-W stereo, 140-W mono, 4.5- to 26-V, analog input Class-D audio amplifier w/ low idle current

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Product details

Parameters

Audio input type Analog Input Architecture Class-D Speaker channels (Max) Stereo Power stage supply (Max) (V) 26 Power stage supply (Min) (V) 4.5 Load (Min) (ohms) 2 Output power (W) 70 SNR (dB) 102 THD + N @ 1 kHz (%) 0.1 Iq (Typ) (mA) 17 Control interface Hardware Closed/open loop Closed Analog supply (Min) (V) 4.5 Analog supply (Max) (V) 26 PSRR (dB) 70 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

HTSSOP (DAD) 32 89 mm² 11 x 8.1 open-in-new Find other Speaker amps

Features

  • 2 × 70 W Into a 4-Ω BTL Load at 24 V
  • Wide Voltage Range: 4.5 V to 26 V
  • Efficient Class-D Operation
    • Very Low Idle Current: <23 mA for recommended LC filter configurations
    • Greater than 90% Power Efficiency
    • Adaptive Modulation Schemes based on Output Power
  • Multiple Switching Frequencies
    • AM Avoidance
    • Master and Slave Synchronization
    • 300-KHz to 1.2-MHz Switching Frequency
  • Feedback Power-Stage Architecture With High PSRR Reduces PSU Requirements
  • Programmable Power Limit
  • Parallel BTL Mode and Mono-Channel Mode Support
  • Supports Both Single and Dual Power Supply Modes
  • Integrated Self-Protection Circuits Including Overvoltage, Undervoltage, Overtemperature, DC-Detect, and Short Circuit With Error Reporting
  • Thermally Enhanced Packages
    • DAD (32-Pin HTSSOP Pad Up)
  • Pin to Pin Compatible with TPA3116D2 and TPA3126D2
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Description

The TPA3156D2 has low idle power loss and helps to extend the battery life of Bluetooth/Wireless speakers and other battery-powered audio systems. The high efficiency of the TPA3156D2 device allows it to do 2 × 70 W with external heat sink on a dual layer PCB. This device integrates an efficiency boost mode, which dynamically reduces the current ripple of the external LC filter and the idle current .

The TPA3156D2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences, which is achieved together with an option of either master or slave option, making it possible to synchronize multiple devices.

The TPA3156D2 devices are fully protected against faults with short-circuit protection and thermal protection as well as overvoltage, undervoltage, and DC protection. Faults are reported back to the processor to prevent devices from being damaged during overload conditions.

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Technical documentation

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Type Title Date
* Data sheet TPA3156D2 2 x 70-W, Analog Input, Stereo, Class-D Audio Amplifier With Low Idle Power Dissipation datasheet Dec. 01, 2017
Application note Achieve Ultra-Low Idle Current With TPA3128D2 (Rev. A) May 01, 2018
User guide TPA3156D2 EVM User's Guide Oct. 06, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
149
Description

The TPA3156D2EVM allows for the evaluation of the TPA3156D2. This is an efficient class D audio power amplifier for driving 2 bridged-tied stereo speakers at 70W per channel.

Features
  • Supports Multiple Output Configurations
    • 2 × 70 W Into a 4-O BTL Load at 24 V, with 10% THD
  • Wide Voltage Range: 4.5 V to 26 V
  • Efficient Class-D Operatio
    • Up to 90% Power Efficiency
    • Combined With Low Idle Loss Advanced Modulation Schemes
  • Programmable Power Limit

Design tools & simulation

SIMULATION MODEL Download
SLOM444.ZIP (43 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLOM445.TSC (97 KB) - TINA-TI Reference Design
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (DAD) 32 View options

Ordering & quality

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  • Ongoing reliability monitoring

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