TPA2000D2PWP

Overview

The TPA2000D2PWP is a 2-W filterless stereo Class-D audio power amplifier from Texas Instruments. It operates on a single 4.5-V to 5.5-V supply and delivers over 2 W into a 3-Ω load with less than 1% THD+N. The device features an optimized modulation scheme that eliminates the need for output LC filters, reducing system cost and PCB area. It includes four internal gain settings ranging from 8 dB to 23.5 dB, selectable via GAIN0 and GAIN1 pins. Supply current is 8 mA without a filter, and shutdown current is 1 µA.

Feature Summary

• Filterless operation enabled by a specialized modulation scheme that reduces switching losses and allows direct connection to speakers without external LC components.
• Integrated depop circuitry minimizes audible popping noises during power-up, power-down, and shutdown transitions.
• Comprehensive protection mechanisms including thermal shutdown, under-voltage lockout, and short-circuit protection for battery, ground, and load conditions.

Applications

• Battery-powered multimedia speakers
• Notebook PC integrated audio systems
• Powered speaker enclosures

Procurement Notes

Verify the specific package variant when ordering; the PWP suffix denotes the HTSSOP package available in tube or tape-and-reel formats. Confirm RoHS compliance and moisture sensitivity level requirements for your assembly process. Ensure the design accounts for the specified operating temperature range of -40°C to 85°C. Cross-reference the latest packaging addendum for any updates to lead finish or material declarations.

Selection Notes

Select this component for applications requiring high efficiency in a compact form factor where eliminating output filters is critical. The fixed internal gain settings simplify the input network design but require careful consideration of input impedance variations. Ensure the power supply can maintain stability within the 4.5-V to 5.5-V range. Use low-ESR capacitors for decoupling to optimize total harmonic distortion performance.

Part Context

This device belongs to Texas Instruments' third-generation 5-V Class-D amplifier family. It improves upon previous generations by offering lower supply current, a reduced noise floor, and higher efficiency. The monolithic integration of power MOSFETs and control logic allows for a bridge-tied load (BTL) configuration in a small 24-pin HTSSOP package.

Replacement Considerations

TPA2000D2PW: Identical electrical specifications and functionality, differing only in the standard TSSOP package instead of the HTSSOP variant.

FAQ

Why does the TPA2000D2 not require an output filter?

The amplifier uses a unique modulation scheme where the positive and negative outputs switch in phase. This keeps the differential voltage across the load near zero for most of the switching period, significantly reducing ripple current and I²R losses in the speaker, thereby allowing filterless operation.

How are the gain settings configured?

Gain is set internally using two digital input pins, GAIN0 and GAIN1. These pins accept TTL logic levels to select one of four gain values: 8 dB, 12 dB, 17.5 dB, or 23.5 dB. Changing the gain also alters the input impedance of the amplifier.