TDA8559T/N1,518

Overview

The TDA8559T/N1,518 is a stereo amplifier IC from NXP USA Inc. operating within a supply voltage range of 1.9 V to 30 V with very low quiescent current. It features differential inputs and supports mono Bridge-Tied Load (BTL) or stereo Single-Ended (SE) configurations. The device includes an internal voltage buffer allowing operation without series load capacitors in SE mode. Key electrical parameters include a typical total quiescent current of 2.75 mA at 3 V, standby current under 10 μA, and output power up to 140 mW in BTL mode at 25 Ω. It provides short-circuit protection, mute/standby modes, and ESD protection.

Feature Summary

• Operates over a wide supply voltage range from 1.9 V to 30 V with very low quiescent current consumption.
• Supports both mono Bridge-Tied Load (BTL) and stereo Single-Ended (SE) amplifier configurations.
• Features an internal voltage buffer enabling single-ended applications without requiring loudspeaker coupling capacitors.
• Includes comprehensive protection mechanisms such as short-circuit proofing to ground, supply, and across the load.

Applications

• Portable telephones
• MP3 players
• Portable audio devices
• Mains fed equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and environmental compliance status. Confirm component availability and lifecycle status directly with NXP USA Inc. or authorized distributors prior to procurement planning.

Selection Notes

Select this component for designs requiring flexible supply voltages from battery-operated systems to mains-fed equipment. Ensure input configuration matches the supply voltage level: floating pin for low voltage or connected to VP for high voltage applications. Verify thermal dissipation requirements based on the chosen load impedance and ambient temperature conditions.

Part Context

The TDA8559T belongs to the TDA855 family of low-voltage stereo headphone amplifiers manufactured by NXP USA Inc. It is designed for portable audio applications where low power consumption and minimal external components are critical. The device integrates dynamic quiescent current control to maintain low distortion while conserving energy.

Replacement Considerations

Consult NXP USA Inc. official documentation for verified substitute part numbers. No direct public substitutes are listed in the provided source material.

FAQ

How does the input mode pin affect the application?

When the input mode pin is floating, it is used for supply voltages below 6 V with a DC path to ground. When connected to VP, it is used for supply voltages greater than 6 V, requiring coupling capacitors at the inputs.

What is the function of the BUFFER pin?

The BUFFER pin delivers a voltage of 0.5VP and can replace single-ended capacitors in headphone applications, reducing distortion when the load is connected between an output and the buffer.