TDA8512J/N1,112

Overview

The TDA8512J/N1,112 is a class-B power amplifier integrated circuit manufactured by NXP Semiconductors. It features four single-ended channels capable of delivering up to 13 W per channel into a 2 Ω load or two BTL channels providing 26 W into a 4 Ω load. The device operates within a supply voltage range of 6 V to 18 V and includes built-in thermal and short-circuit protection. It utilizes a 17-lead DBS17P plastic DIL-bent-SIL package designed for through-hole mounting in automotive and multimedia audio applications.

Feature Summary

• Configurable output topology supporting either four single-ended channels or a combination of two single-ended and one bridge-tied load channel
• Integrated mode select switch enabling low-power standby operation, mute functionality, and standard operating modes
• Comprehensive protection circuits including thermal shutdown and short-circuit safety to ground, supply, and across the load

Applications

• Multimedia systems requiring high-fidelity audio amplification
• Active speaker systems configured for stereo with subwoofer setups
• Quadraphonic active speaker configurations
• Automotive audio amplifier modules

Procurement Notes

Verify component authenticity through authorized distribution channels as this part may be subject to obsolescence. Confirm that the specific ordering suffix matches the required package variant and compliance standards. Review the latest manufacturer documentation for any updates regarding lead-free status or material declarations before finalizing procurement plans.

Selection Notes

Select this amplifier when designing systems requiring flexible channel configurations between single-ended and bridge-tied loads. Ensure the power supply can deliver sufficient current for peak outputs and that adequate heatsinking is provided given the thermal resistance characteristics. Verify input coupling capacitor values to maintain desired low-frequency response while minimizing switch-on delays.

Part Context

This component belongs to the TDA851x series of power amplifiers from NXP Semiconductors. It shares architectural similarities with the TDA8510 and TDA8511 but offers distinct channel configuration options. The series is designed for robust performance in demanding audio environments, providing reliable amplification with minimal external component requirements.

Replacement Considerations

Official substitutes include the TDA8510J and TDA8511J. Verify pin compatibility and electrical specifications against the original design requirements before substitution. Ensure that any replacement part meets the same thermal and voltage limiting values specified for the TDA8512J.

FAQ

How does the mode select switch prevent switch-on plops?

To avoid audible plops, the amplifier should be kept in mute mode for longer than 100 ms during switch-on. This allows the input capacitors at pins INV1, INV2, INV3, and INV4 to charge smoothly, preventing sudden DC shifts at the outputs.

What are the conditions for activating standby mode?

Standby mode is activated by applying a low DC level between 0 V and 2 V to the MODE pin. In this state, power consumption reduces to less than 1.5 mW, and input/output pins enter a high-impedance floating condition.