TS4990IDT

Overview

The TS4990IDT is a Class A-B audio power amplifier manufactured by STMicroelectronics, designed for mobile phone applications to minimize external component count. It delivers 1.2 W continuous RMS output power into an 8 Ω load at 5 V supply voltage. The device operates within a wide supply range of 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

• Class A-B architecture optimized for high efficiency and low distortion in compact designs
• Ultra-low consumption standby mode with externally controlled enable functionality
• Integrated thermal shutdown protection for enhanced operational reliability
• Near-zero pop-and-click performance ensuring silent startup and shutdown

Applications

• Mobile phones
• Portable audio devices
• Speaker amplification systems

Procurement Notes

Verify the specific package type against the datasheet, as the TS4990 series includes multiple options such as DFN8, miniSO-8, and 9-bump flip-chip. Confirm the suffix 'DT' corresponds to the required reel quantity and packaging format for your assembly line. Ensure the operating temperature range meets your environmental specifications, as industrial variants may differ from commercial grades.

Selection Notes

Select this component when designing battery-powered audio systems requiring minimal external passive components. The wide supply voltage range supports direct connection to single-cell lithium-ion batteries without additional boosting circuitry. Consider the unity-gain stability and configurable external gain setting resistors for flexible system integration. Verify that the 1.2 W output capability aligns with the impedance and sensitivity of the target speaker load.

Part Context

The TS4990 belongs to STMicroelectronics' TS4990 series of audio power amplifiers. This family is engineered specifically for demanding portable audio applications where space and power efficiency are critical constraints. The series offers various package options to accommodate different PCB layout requirements while maintaining consistent electrical performance across the product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult official STMicroelectronics resources or authorized distributors for qualified alternatives if this specific part number is unavailable.