TPA2000D2PWPR

Overview

The TPA2000D2PWPR 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 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. Key electrical parameters include a typical supply current of 8 mA without a filter, a shutdown current of 1 µA, and a switching frequency centered at 250 kHz.

Feature Summary

• Filterless operation enabled by a specialized modulation scheme that reduces ripple current and allows direct connection to speakers without external LC filtering.
• Integrated depop circuitry minimizes audible popping and clicking noises during power-up, power-down, and shutdown transitions.
• Comprehensive protection mechanisms including thermal shutdown, over-current detection, and short-circuit protection against battery, ground, and load faults.

Applications

• Battery-powered portable multimedia devices
• Notebook PC integrated speaker systems
• Powered desktop speakers

Procurement Notes

Verify the specific package variant (PWP) matches the required reel quantity of 2000 units. Confirm the operating temperature range meets the application's environmental requirements. Ensure proper decoupling capacitors are selected to maintain low equivalent-series resistance for optimal performance.

Selection Notes

Select this component for designs requiring high efficiency in a 5-V single-supply environment. The absence of output filters makes it suitable for space-constrained layouts. Consider the input impedance variations associated with different gain settings when designing the preceding audio stage coupling network.

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, reduced noise floor, and higher efficiency. The monolithic BTL configuration utilizes high-speed power MOSFETs to reproduce analog signals through high-frequency switching.

Replacement Considerations

Direct functional replacements within the same generation may include other variants in the TPA2000D2 series, such as the tube-packaged TPA2000D2PWP, provided the packaging format difference is acceptable for the assembly process.

FAQ

Can the TPA2000D2 operate without an output filter?

Yes, the device uses a modulation scheme optimized to operate without an output filter, which saves approximately 30% in system cost and 75% in PCB area compared to traditional Class-D amplifiers.

How is the amplifier gain configured?

The gain is set internally using two digital input pins, GAIN0 and GAIN1. These pins allow selection among four gain levels: 8 dB, 12 dB, 17.5 dB, and 23.5 dB.