TS4909IQT

Overview

The TS4909IQT is a stereo audio amplifier designed for portable applications, utilizing an integrated phantom ground topology to eliminate heavy output coupling capacitors. It operates from a single supply voltage ranging from 2.2V to 5.5V and delivers up to 158mW of continuous average power into a 16-ohm load with less than 1% THD+N at 5V. The device features Class AB operation, unity gain stability configurable via external resistors, and ultra-low standby current consumption of 10nA typical. It includes pop-and-click noise reduction circuitry and is available in a lead-free 10-pin DFN package measuring 3x3mm.

Feature Summary

• Integrated phantom ground topology eliminates the need for bulky output coupling capacitors, optimizing space for portable devices.
• Pop-and-click noise reduction circuitry prevents audible disturbances during switch-on and switch-off phases.
• Active low standby mode significantly reduces supply current consumption to minimize battery drain.
• Capable of driving headphones directly without external DC blocking components.

Applications

• Portable audio players
• Mobile phones
• MP3 players

Procurement Notes

Verify the specific suffix 'IQT' corresponds to the tape and reel packaging format when ordering. Confirm that the component meets RoHS3 compliance requirements for your manufacturing process. Ensure the design accommodates the 10-DFN (3x3 mm) footprint dimensions. Check for any specific moisture sensitivity level handling instructions prior to soldering.

Selection Notes

Select this component for designs requiring capacitor-less headphone amplification to save board space. It is suitable for systems powered by single supplies between 2.2V and 5.5V. Consider the 158mW output capability into 16 ohms for standard impedance headphones. The ultra-low standby current makes it ideal for battery-operated devices requiring extended life.

Part Context

The TS4909IQT belongs to the TS4909 family of stereo audio amplifiers manufactured by STMicroelectronics. This series is specifically engineered for mobile and portable electronics where size and power efficiency are critical constraints. The IQT designation indicates the specific package and reel configuration within the broader product line.

Replacement Considerations

Consult official datasheets for direct pin-compatible alternatives within the same manufacturer's portfolio. Verify electrical parameters such as output power and supply voltage ranges match your system requirements before substitution.

FAQ

Does the TS4909IQT require output coupling capacitors?

No, the device utilizes an integrated phantom ground topology that eliminates the need for heavy output coupling capacitors.

What is the typical standby current consumption?

The typical standby current consumption is 10 nA when the active low standby mode is enabled.