1.4-W, mono analog input class-d speaker amp with 1.8-V logic compatibility on shutdown pin


Product details


Audio input type Analog Input Architecture Class-D Speaker channels (Max) Mono Power stage supply (Max) (V) 5.5 Power stage supply (Min) (V) 2.5 Load (Min) (ohms) 8 Output power (W) 1.4 SNR (dB) 97 THD + N @ 1 kHz (%) 0.2 Iq (Typ) (mA) 2.8 Control interface Hardware Closed/open loop Closed Analog supply (Min) (V) 2.5 Analog supply (Max) (V) 5.5 PSRR (dB) 75 Operating temperature range (C) -40 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

HVSSOP (DGN) 8 9 mm² 3 x 3 VSON (DRB) 8 9 mm² 3 x 3 VSON (DRB) 8 9 mm² 3.0 x 3.0 open-in-new Find other Speaker amps


  • 1.4 W Into 8 Ω From a 5 V Supply at THD = 10% (Typ)
  • Maximum Battery Life and Minimum Heat
    • Efficiency With an 8-Ω Speaker:
      • 84% at 400 mW
      • 79% at 100 mW
    • 2.8-mA Quiescent Current
    • 0.5-μA Shutdown Current
  • Capable of Driving an 8-Ω Speaker (2.5 V ≤ VDD ≤ 5.5 V) and a 4-Ω Speaker (2.5 V ≤ VDD ≤ 4.2 V)
  • Only Three External Components
    • Optimized PWM Output Stage Eliminates LC Output Filter
    • Internally Generated 250-kHz Switching Frequency Eliminates Capacitor & Resistor
    • Improved PSRR (–71 dB at 217 Hz) and Wide Supply Voltage (2.5 V to 5.5 V) Eliminates Need for a Voltage Regulator
    • Fully Differential Design Reduces RF Rectification & Eliminates Bypass Capacitor
    • Improved CMRR Eliminates Two Input Coupling Capacitors
  • Space Saving Package
    • 3 mm × 3 mm QFN package (DRB)
    • 2.5 mm × 2.5 mm MicroStar Junior BGA Package (ZQY)
    • 3 mm x 5 mm MSOP PowerPAD Package (DGN)
  • Use TPA2006D1 for 1.8 V Logic Compatibility on Shutdown Pin

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The TPA2005D1 is a 1.4-W high efficiency filter-free class-D audio power amplifier in a MicroStar Junior™ BGA, QFN, or MSOP package that requires only three external components.

Features like 84% efficiency, –71-dB PSRR
at 217 Hz, improved RF-rectification immunity, and
15 mm2 total PCB area make the TPA2005D1 ideal for cellular handsets. A fast start-up time of 9 ms with minimal pop makes the TPA2005D1 ideal for PDA applications.

In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the TPA2005D1. The device allows independent gain control by summing the signals from each function while minimizing noise to only 48 μVRMS.

The TPA2005D1 has short-circuit and thermal protection.

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Technical documentation

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Type Title Date
* Data sheet TPA2005D1 1.4-W MONO Filter-Free Class-D Audio Power Amplifier datasheet (Rev. G) Oct. 27, 2015
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019
Application note AN-1737 Managing EMI in Class D Audio Applications (Rev. A) May 01, 2013
Application note Measuring Class-D Amplifiers for Audio Speaker Overstress Testing Oct. 28, 2005
Application note Power Rating in Audio Amplifier (Rev. A) Mar. 04, 2005
User guide TPA2005D1EVM - User Guide Jun. 27, 2002

Design & development

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

Hardware development

document-generic User guide

The TPA2005D1 is a 1-W high efficiency filter-free class-D audio power amplifier in a MicroStar™ BGA package that requires only three external components. It is ideal for small battery operated electronics including wireless or cellular handsets, personal digital assistants (PDAs), and voice (...)

  • Modulation Scheme Optimized to Operate Without a Filter
  • 1.1 W Into an 8 Ohm Speaker
  • <0.2 % THD+N at 1 W, 1 kHz, Into an 8 Ohm Speaker
  • Only Three External Components:
    • Optimized PWM Output Stage Eliminates LC Filter
    • 80-dB PSRR and Wide Supply Voltage for Direct Connect to Battery
    • Fully Differential Design (...)

Design tools & simulation

SLOM184A.ZIP (84 KB) - PSpice Model
SLOM185.ZIP (17 KB) - TINA-TI Spice Model
SLOM186.TSC (26 KB) - TINA-TI Reference Design
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 (...)
  • 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
  • (...)

Reference designs

Alarm tone generator reference design
TIDA-010040 — This reference design provides a way of generating alarms similar to as described in the IEC60601-1-8 standard for medical devices. The critical timing parameters are programmable through firmware. All parameters, including pulse width, pulse rate, internal frequency, pulse rise time, volume (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HVSSOP (DGN) 8 View options
SON (DRB) 8 View options

Ordering & quality

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