TDA8511J/N2,112

Overview

The TDA8511J is a four-channel single-ended Class-B power amplifier designed for multimedia and active speaker applications. It delivers up to 13 W per channel into a 2 Ω load with fixed gain. The device integrates comprehensive protection mechanisms including thermal shutdown, AC/DC short-circuit safety, and reverse polarity protection. A diagnostic output pin provides real-time feedback on distortion, short circuits, and temperature faults. It operates within a supply voltage range of 6 V to 18 V.

Feature Summary

• Integrated dynamic distortion detector for clipping indication
• AC and DC short-circuit safe to ground and supply voltage
• Thermal protection activates at virtual junction temperature of 150 °C
• Mode select switch enables mute and low standby current operation

Applications

• Multimedia audio systems
• Active speaker systems
• Four-channel single-ended amplification
• Audio processing control via diagnostic output

Procurement Notes

Verify component authenticity through official NXP channels. Confirm package integrity and lead condition upon receipt. Ensure storage conditions remain within specified limits to prevent moisture damage or degradation prior to soldering.

Selection Notes

Select this component for designs requiring integrated fault detection and minimal external circuitry. Evaluate thermal resistance requirements based on ambient operating conditions. Ensure supply voltage stability meets the specified ripple rejection criteria for optimal performance.

Part Context

This part belongs to the TDA8511 series of power amplifiers manufactured by NXP Semiconductors. It utilizes a DBS17P plastic DIL-bent-SIL power package with 17 leads. The device is classified as an integrated circuit for linear audio amplification applications.

Replacement Considerations

No official substitute part numbers are documented in the provided datasheet. Designers should consult NXP technical support for validated alternatives if this specific variant is unavailable.

FAQ

How does the diagnostic output function?

Pin 16 serves as an open-collector diagnostic output that goes LOW during dynamic distortion (clipping), short-circuit conditions, or when the virtual junction temperature reaches 150 °C.

What is the recommended procedure to avoid switch-on plops?

Keep the amplifier in mute mode for at least 100 ms during power-up to allow input capacitors to charge before enabling the signal path.