TS4999EIJT

Overview

The TS4999EIJT is a stereo fully-differential Class D audio power amplifier manufactured by STMicroelectronics. It operates from a supply voltage of 2.4 V to 5.5 V and delivers up to 2.8 W per channel into a 4 Ω load at 5 V with 10% THD+N, or 0.7 W into an 8 Ω load at 3.6 V with 1% THD+N maximum. The device features selectable gain settings of 3.5, 6, 9.5, and 12 dB via discrete pins, along with a digital input for enabling 3D sound enhancement effects. It includes pop and click reduction circuitry for fast startup within approximately 8 ms and supports independent standby control for each channel.

Feature Summary

• Stereo Class D architecture with fully differential inputs and outputs
• Selectable 3D sound effect enhancement controlled by a single digital pin
• Four programmable gain steps configurable via two discrete logic pins
• Independent active-low standby mode for left and right channels

Applications

• Cellular phones
• Personal Digital Assistants (PDAs)
• Notebook PCs

Procurement Notes

Verify the specific ordering suffix 'EIJT' against the manufacturer's current datasheet to confirm package type and availability status. Ensure design compliance with absolute maximum ratings, particularly regarding supply voltage limits and thermal dissipation constraints. Confirm that the flip-chip 18-bump lead-free package matches the target PCB footprint requirements.

Selection Notes

Select this component for applications requiring high efficiency and low current consumption in portable devices. The filterless design capability reduces external component count, while the differential input topology improves noise immunity. Consider the available gain settings and 3D effect options when designing the audio signal chain for specific speaker impedance loads.

Part Context

This part belongs to the TS4999 series of filter-free stereo audio amplifiers. It utilizes a flip-chip 18-bump lead-free package suitable for space-constrained mobile electronics. The device integrates short-circuit and thermal shutdown protection to ensure reliability under fault conditions.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers. Verify compatibility of pin assignments and electrical characteristics before substitution.

FAQ

How is the 3D sound effect enabled?

The 3D effect is enabled by driving the dedicated digital input pin (3D) to a high logic level.

What is the function of the G0 and G1 pins?

The G0 and G1 pins are used to select one of four gain setting steps: 3.5, 6, 9.5, or 12 dB.

Can the channels be operated independently?

Yes, the device has separate active-low standby pins (STDBYL and STBYR) allowing each channel to be switched off individually.