TSDP11XX1NBGIZBX

Overview

The TSDP11XX1NBGIZBX is a stereo Class-H Capless DirectConnect headphone amplifier from Tempo Semiconductor. It features independent left/right channel volume control, mute, and fine parameter adjustment via an I2C interface. The device provides high-quality audio fidelity with an SNR/DNR of up to 106dB and THD+N as low as -85dB. It delivers up to 170mW per channel into 16Ω or 2Vrms into 10KΩ loads. Operating on a power supply voltage range of 2.5V to 5.5V, it utilizes differential inputs for maximum noise rejection.

Feature Summary

• Class-H Capless DirectConnect architecture eliminates large output DC blocking capacitors, reducing board area and component height while enabling full bass response without attenuation.
• Independent left and right channel volume control ranging from +6dB to -22dB with software-controlled mute functionality.
• Advanced anti-pop circuitry prevents audible transients during startup, shutdown, and muting operations.
• Integrated current limiter and thermal overload protection safeguard the amplifier outputs against short-circuit conditions.

Applications

• Gaming-class motherboards
• Tablet computers
• Portable gaming platforms
• Bluetooth-enabled headphones and headsets
• USB-C-enabled mobile phones and tablets

Procurement Notes

Verify the specific suffix 'NBGIZBX' against official ordering guides to confirm temperature range and packaging type. Confirm that the I2C address and register map align with system requirements. Ensure input voltage levels match the 2.5V to 5.5V operating range. Validate pin compatibility with the 20-pin QFN footprint before integration.

Selection Notes

Select this component for applications requiring high-fidelity audio in space-constrained portable devices. The Class-H architecture offers significant power savings compared to Class A/B solutions at typical listening levels. The integrated charge pump allows direct battery connection without compromising dynamic range. Differential inputs are ideal for noisy environments requiring high CMRR.

Part Context

This part belongs to the TSDP11xx/TSDP10xx family of stereo headphone amplifiers. The TSDP11xx variant specifically includes I2C programmable controls for volume and mute, distinguishing it from the fixed-function TSDP10xx. Both share the same core Class-H DirectConnect technology and physical package dimensions.

Replacement Considerations

Direct substitutes within the same family include the TSDP10xx series for fixed-function applications. Verify if alternative packages or temperature grades are available through the manufacturer's ordering guide. Cross-reference pinouts and electrical characteristics with any proposed replacements to ensure functional equivalence.

FAQ

How does the Class-H architecture improve efficiency?

The Class-H charge pump dynamically adjusts the supply voltage based on the output signal level. This reduces power consumption by approximately 45% at typical listening levels compared to traditional Class A/B amplifiers.

What is the purpose of the DirectConnect technology?

DirectConnect uses a charge pump to create internal negative supplies, allowing outputs to be centered around ground. This eliminates the need for large DC-blocking capacitors, saving board space and improving low-frequency response.

Can the volume be controlled independently for each channel?

Yes, the TSDP11xx provides independent left and right channel volume control via the I2C interface, allowing for precise gain adjustment from +6dB to -22dB.