TS4890IQT

Overview

The TS4890IQT is a single-channel audio power amplifier manufactured by STMicroelectronics, designed for high-quality audio applications. It operates from a single supply voltage ranging from 2.2V to 5.5V and delivers 1W of continuous RMS output power into an 8-ohm load at 5V with 1% THD. The device features rail-to-rail output capability, ultra-low distortion (0.1%), and a gain-bandwidth product of 2 MHz. It includes pop and click reduction circuitry, thermal shutdown protection, and standby mode control that reduces supply current to less than 10nA. The component is housed in a DFN8 package and supports operation across a temperature range of -40°C to +85°C.

Feature Summary

• Rail-to-rail output stage enables maximum dynamic range and power delivery within the supply voltage limits.
• Integrated pop and click reduction circuitry minimizes audible transients during power-up and power-down sequences.
• Ultra-low consumption standby mode significantly extends battery life in portable devices when the amplifier is inactive.
• Internal thermal shutdown protection safeguards the device against overheating under fault conditions.

Applications

• Mobile phones and cellular/cordless telephones
• Laptop and notebook computers
• Portable audio devices

Procurement Notes

Verify the specific suffix 'IQT' corresponds to the DFN8 package variant as documented in official STMicroelectronics datasheets. Confirm RoHS compliance status and ensure the operating environment remains within the specified -40°C to +85°C temperature range. Cross-reference pin configurations with the official schematic to prevent integration errors.

Selection Notes

Select this component for mono audio applications requiring high efficiency and low distortion in space-constrained designs. The DFN8 package offers a compact footprint suitable for modern mobile electronics. Ensure the load impedance matches the 8-ohm specification for optimal power output. Consider the 2.2V minimum supply voltage for compatibility with single-cell battery systems.

Part Context

The TS4890 series represents STMicroelectronics' solution for portable audio amplification, balancing performance with power efficiency. The TS4890IQT specifically denotes the industrial temperature grade version in the DFN8 package. This part belongs to a family designed to minimize external components while maintaining high audio fidelity for consumer electronics.

Replacement Considerations

Official substitutes include TS4890ID and TS4890IST, which share identical electrical characteristics but differ in packaging (SO8 and MiniSO8 respectively). Verify pinout compatibility before substitution to ensure seamless integration without PCB redesign.