TS4990ID

Overview

The TS4990ID is a single-channel Class A-B audio power amplifier manufactured by STMicroelectronics. It delivers 1.2 W of continuous RMS output power into an 8 Ω load at a supply voltage of 5 V. The device operates within a wide supply voltage range from 2.2 V to 5.5 V and features an externally controlled standby mode that reduces supply current to less than 10 nA. Key electrical characteristics include a gain-bandwidth product of 1.5 MHz, 62 dB PSRR at 217 Hz in grounded mode, and ultra-low distortion of 0.1%. It incorporates internal thermal shutdown protection and near-zero pop-and-click performance.

Feature Summary

• Delivers high-fidelity audio with ultra-low distortion and near-zero pop-and-click artifacts
• Features active low standby mode for significant power reduction in portable devices
• Includes integrated thermal shutdown protection for enhanced reliability
• Configurable via external gain setting resistors while maintaining unity-gain stability

Applications

• Mobile phones
• Portable multimedia players
• Personal digital assistants (PDAs)
• MP3 players

Procurement Notes

Verify the specific package suffix against official datasheets, as variants such as IDT, IQT, and others exist within the TS4990 series. Confirm the exact pinout and footprint requirements for your PCB design, as packages like miniSO-8, DFN8, and flip-chip differ physically. Ensure the selected variant matches your required operating temperature range and supply voltage specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring high efficiency and minimal external components in space-constrained designs. The wide supply voltage range supports various battery-powered systems. Consider the available packaging options to match assembly constraints. Verify that the 1.2 W output power meets the acoustic requirements of the target speaker impedance. Ensure the system design accommodates the thermal management needs associated with the integrated protection features.

Part Context

The TS4990 belongs to STMicroelectronics' portfolio of audio power amplifiers designed for mobile and consumer electronics. It addresses the need for compact, high-performance audio solutions that minimize bill-of-materials costs. The series is engineered to reduce external component counts, facilitating smaller form factors. This specific model represents a single-channel solution optimized for voice and music reproduction in handheld devices.

Replacement Considerations

Check for direct substitutes within the TS4990 family, such as TS4990IDT or TS4990IQT, which may offer different packaging but identical functionality. Verify compatibility with existing circuit layouts when switching between package types. Consult official replacement guides for any discontinued variants.