TFA9841J/N1,112

Overview

The TFA9841J is a single-channel audio power amplifier designed for Single-Ended (SE) applications with a fixed voltage gain of 26 dB. It operates within a supply voltage range of 9 V to 26 V and delivers up to 7.5 W into a 4 Ω load at THD=10%. The device features a unique thermal protection system based on multiple internal temperature sensors, ensuring maximum output power without unnecessary audio interruptions. It includes standby and mute modes with low quiescent current, high supply voltage ripple rejection, and comprehensive short-circuit protection.

Feature Summary

• Unique protection circuit based on multiple internal temperature measurements for optimized output power
• High supply voltage ripple rejection capability
• Integrated soft clipping and no/on/off switching plops prevention
• Outputs protected against short circuits to ground, supply, and across the load

Applications

• Television systems
• PC speakers
• Boom boxes
• Mini and micro audio receivers

Procurement Notes

Verify the specific ordering suffix N1,112 against the manufacturer's current database to confirm package variant and tape/reel specifications. Ensure the component status is checked as the source document indicates preliminary data from 2004; confirm availability and lead times directly with authorized distributors or NXP USA Inc. representatives before finalizing procurement plans.

Selection Notes

Select this component for Single-Ended audio applications requiring a fixed 26 dB gain. Ensure the design accommodates the DBS9P through-hole package and provides adequate heatsinking, as thermal resistance is critical for maintaining performance at higher supply voltages. Verify that the load impedance meets the minimum 4 Ω requirement when operating above 22 V supply voltage.

Part Context

The TFA9841J belongs to a family of audio amplifiers that includes pin-compatible variants such as the TFA9842J and TFA9843J. Originally developed by Philips Semiconductors, the product line has been transferred to NXP USA Inc. The device utilizes a plastic DIL-bent-SIL power package (DBS9P) designed for robust thermal dissipation in consumer audio electronics.

Replacement Considerations

The TFA9842J and TFA9843J are explicitly documented as pin-compatible replacements within the same series. Verify functional differences between these variants to ensure they meet the specific channel configuration requirements of the target application.