TPA2000D1PWR

Overview

The TPA2000D1PWR is a 2-W mono bridge-tied-load (BTL) Class-D audio power amplifier from Texas Instruments. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and delivers 2 W of continuous output power into a 4-Ω load with less than 1% THD+N at 1 kHz. The device utilizes third-generation modulation technology optimized for filterless operation, eliminating the need for external LC filters while maintaining high efficiency. It features four internal gain settings selectable via digital inputs, integrated depop circuitry to minimize startup noise, and comprehensive protection mechanisms including short-circuit and thermal shutdown.

Feature Summary

• Third-generation Class-D modulation scheme enables direct speaker connection without an output LC filter, reducing system size and EMI shielding requirements.
• Four programmable gain levels (6 dB, 12 dB, 18 dB, and 23.5 dB) are selected using two TTL logic-level input pins.
• Integrated depop circuitry reduces audible popping during power-up and shutdown transitions.
• Includes short-circuit protection against shorts to battery, ground, and load.

Applications

• Notebook personal computers
• Powered speakers
• Portable audio devices requiring extended battery life

Procurement Notes

Verify the specific package variant when ordering; the 'PW' suffix indicates a 16-pin TSSOP package, while 'GQC' denotes a MicroStar Junior BGA. Confirm that the 'R' suffix in part numbers like TPA2000D1PWR specifies tape-and-reel packaging. Ensure the design supports the -40°C to 85°C operating temperature range and matches the required gain configuration via GAIN0 and GAIN1 pins.

Selection Notes

Select this component for applications prioritizing high efficiency and minimal external component count. It is suitable for systems where space constraints prevent the use of bulky output filters. Designers must account for variable input impedance across different gain settings when configuring the input coupling capacitor to maintain desired low-frequency response characteristics.

Part Context

This device belongs to Texas Instruments' third-generation Class-D audio amplifier family. It is designed as a cost-effective solution for driving small speakers in portable electronics. The TPA2000D1 serves as a bridge-tied-load amplifier, allowing double the voltage swing across the load compared to single-ended configurations, thereby maximizing output power within low-voltage supply limits.

Replacement Considerations

TPA2000D1PW

FAQ

Why does the TPA2000D1 not require an output filter?

It uses a unique modulation scheme where the outputs switch in phase rather than being 180 degrees out of phase. This significantly reduces ripple current through the speaker, minimizing I²R losses and allowing direct connection without an LC filter.

How is the amplifier gain configured?

Gain is set internally by applying logic levels to the GAIN0 and GAIN1 pins. The available settings are 6 dB, 12 dB, 18 dB, and 23.5 dB, which also determine the input impedance.