TDA8941P/N1,112

Overview

The TDA8941P/N1,112 is a single-channel audio power amplifier delivering 1.5 W output power into a 16 Ω load at a 9 V supply. It utilizes a Bridge Tied Load (BTL) architecture with an all-NPN output stage capable of 2 A peak current. The device operates on a supply voltage range of 6 V to 18 V and features a fixed voltage gain of 32 dB. Key electrical parameters include a quiescent current of 42 mA and a standby current of 10 μA. It incorporates short-circuit protection to ground, supply, and across the load, along with thermal shutdown.

Feature Summary

• Bridge Tied Load (BTL) configuration eliminates the need for expensive DC-blocking capacitors.
• Three-level MODE input enables distinct standby, mute, and operating modes.
• Integrated protection circuits prevent damage from short circuits and excessive junction temperatures.
• Designed for low component count with high supply voltage ripple rejection.

Applications

• Mains-fed applications such as TV sound systems
• PC audio subsystems
• Portable audio equipment

Procurement Notes

Verify the specific ordering suffix N1,112 against the manufacturer's current documentation to confirm package type and environmental compliance status. Ensure the design accounts for the DIP8 plastic dual in-line package constraints and thermal resistance characteristics specified in the product specification.

Selection Notes

Select this component for mono audio applications requiring BTL topology without external coupling capacitors. Consider the fixed 32 dB gain and 6 V to 18 V supply range during circuit design. Evaluate thermal dissipation requirements based on the 100 K/W junction-to-ambient resistance for the plastic package.

Part Context

The TDA8941P belongs to the TDA894x family of audio amplifiers. It is designed to be printed-circuit board compatible with other types in this family, allowing a single PCB footprint to accommodate both mono and stereo products within the series.

Replacement Considerations

Consult official documentation for verified substitutes within the TDA894x family that share the same PCB footprint and functional interface.

FAQ

How does the MODE pin control the amplifier states?

The MODE pin selects between three states: Standby (low current, outputs floating), Mute (DC-biased, no audio output), and Operating (normal function). Specific voltage thresholds relative to VCC determine the active state.

What protection mechanisms are included?

The device includes short-circuit protection for connections to ground, supply, and across the load, as well as thermal shutdown protection that activates when the junction temperature reaches approximately 150 °C.