TS4871IQT

Overview

The TS4871IQT is a monolithic audio power amplifier in an 8-pin DFN package. It delivers 1W continuous RMS output power into an 8Ω load at 5V supply with 1% THD. Operating voltage ranges from 2.5V to 5.5V. Standby mode reduces current to under 10nA. The device features rail-to-rail output, unity-gain stability, and internal thermal shutdown.

Feature Summary

• Bridge-tied load (BTL) architecture for high efficiency
• Ultra-low standby current consumption
• Internal thermal shutdown protection
• Near-zero pop and click performance

Applications

• Mobile phones
• Laptop computers
• Portable audio devices

Procurement Notes

Verify the IQT suffix indicates the MiniSO8 or DFN8 tape and reel packaging format. Confirm the component status as active or obsolete through official STMicroelectronics channels before integration. Ensure the specific package variant matches the PCB footprint requirements.

Selection Notes

Select this part for single-channel mono applications requiring high output power relative to supply voltage. The BTL configuration doubles the effective voltage swing across the load compared to single-ended designs. Verify that the 8Ω load impedance aligns with the specified 1W power rating conditions.

Part Context

This component belongs to the TS4871 series of low-voltage audio amplifiers. It is designed to minimize external components while maintaining high audio quality. The DFN8 package offers space-saving benefits and improved thermal dissipation compared to traditional SO packages.

Replacement Considerations

TS4871IST (MiniSO8), TS4871ID (SO8)

FAQ

How is the gain configured?

The closed-loop gain is set by external resistors Rin and Rfeed using the formula Gv = 2 * (Rfeed / Rin).

What triggers the standby mode?

Standby mode is activated when the standby pin voltage is tied to VCC, reducing supply current to less than 10nA.