TS4621MLEIJT

Overview

The TS4621MLEIJT is a high-performance Class-G stereo headphone amplifier manufactured by STMicroelectronics. It operates within a power supply range of 2.3 V to 4.8 V and features a quiescent current of 0.6 mA per channel. The device delivers a typical Total Harmonic Distortion plus Noise (THD+N) of 0.006% at 1 kHz, with a Power Supply Rejection Ratio (PSRR) of 100 dB at 217 Hz. It provides 100 dB Signal-to-Noise Ratio (SNR) A-weighted at G = 0 dB. The amplifier includes an integrated high-efficiency step-down converter, eliminating the need for output coupling capacitors. Gain settings are selectable between 0 dB and 6 dB, and it supports I2C volume control.

Feature Summary

• Integrated high-efficiency step-down converter enables capless operation without output coupling capacitors
• I2C interface allows digital volume control and independent channel enable management
• Zero pop and click performance ensures silent startup and shutdown transitions
• Low standby current consumption of 5 µA maximum extends battery life in portable devices

Applications

• Evaluation of audio differential input stereo headphone amplifiers using demonstration boards
• Portable consumer electronics requiring low-power stereo audio playback
• Battery-operated devices utilizing I2C-controlled gain and mute functions

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package integrity upon receipt, as the flip-chip format requires careful handling. Check manufacturing date codes against current availability status, as this series may have specific lifecycle notifications. Ensure compatibility with existing PCB layouts designed for the 16-pin flip-chip configuration.

Selection Notes

Select this component for designs requiring high audio fidelity with minimal external passive components. The integrated buck converter simplifies power architecture compared to traditional Class-AB amplifiers. Consider the 2.3 V minimum supply voltage when designing for single-cell lithium battery applications. Verify that the system supports I2C communication for accessing advanced features like digital volume control and standby modes.

Part Context

The TS4621ML belongs to STMicroelectronics' portfolio of high-performance audio amplifiers. It is part of the TS4621E series, which focuses on delivering superior sound quality in compact form factors. The ML suffix typically denotes the specific package variant, while the EIJT indicates the tape and reel packaging method suitable for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult official STMicroelectronics resources for end-of-life notifications or recommended alternatives if this specific revision is discontinued.