TS4956EIKJT

Overview

The TS4956EIKJT is a Class AB audio amplifier manufactured by STMicroelectronics, designed for portable applications. It integrates three dedicated outputs: a stereo headphone driver, a loudspeaker driver, and a mono line output for hands-free sets. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V. It features digital control via an I²C interface, allowing configuration of gain and output modes through internal registers. Key electrical specifications include a standby current of 500 nA and a quiescent current of 5.7 mA. The unit provides thermal shutdown protection and incorporates turn-on/off depop circuitry to minimize audible noise during power transitions.

Feature Summary

• Integrates three distinct audio outputs including stereo headphone, loudspeaker, and mono line drivers within a single compact package.
• Enables complete system control and gain adjustment through a digital I²C bus interface, significantly reducing the requirement for external components.
• Includes built-in thermal shutdown protection to safeguard the device against overheating conditions.
• Features integrated depop circuitry to eliminate audible switching noises during power-up and power-down sequences.

Applications

• MP3 players
• Cell phones
• Portable devices

Procurement Notes

Verify the specific suffix 'EIKJT' against official STMicroelectronics documentation to confirm pinout compatibility and tape-and-reel packaging details. Ensure that the required I²C address settings align with your system design, as multiple devices may share addresses. Confirm that the operating voltage range of your power supply remains within the specified 2.7 V to 5.5 V limits to guarantee proper functionality and avoid damage.

Selection Notes

Select this component when a multi-output audio solution is required in space-constrained portable designs. The I²C control capability makes it suitable for systems needing dynamic gain adjustment or mode switching without additional hardware. Consider the low standby current for battery-operated devices where power conservation is critical. Evaluate the thermal performance requirements, as the integrated thermal shutdown provides protection but may limit continuous high-power operation in enclosed spaces.

Part Context

The TS4956 belongs to STMicroelectronics' portfolio of audio amplifiers tailored for mobile and consumer electronics. It represents a shift towards digitally controlled analog audio solutions, integrating complex functionality into small packages. This series supports various form factors, including WLCSP and SO packages, catering to the miniaturization trends in smartphones and handheld media players.

FAQ

How is the audio gain controlled?

Gain is controlled digitally via the I²C interface by programming specific internal control registers.

What protection features are included?

The device includes internal thermal shutdown protection and turn-on/off depop circuitry.