TDA8922CJ/N1,112

Overview

The TDA8922CJ/N1 is a high-efficiency Class D audio power amplifier manufactured by NXP Semiconductors. It operates with symmetrical supply voltages ranging from ±12.5 V to ±32.5 V and features low quiescent current consumption. The device provides typical output power of 2 × 75 W in stereo single-ended configuration with a 6 Ω load, or 1 × 155 W in mono bridge-tied load configuration with an 8 Ω load. It supports both internal and external clocking for fixed frequency operation.

Feature Summary

• Pin compatible with TDA8950/20C for both HSOP24 and DBS23P packages
• Stereo full differential inputs configurable as stereo Single-Ended or mono Bridge-Tied Load
• Advanced protection strategy including voltage protection, output current limiting, and Thermal FoldBack
• Smooth pop noise-free start-up and switch off with zero dead time switching

Applications

• DVD systems
• Mini and micro receivers
• Home Theater In A Box (HTIAB) systems
• High-power speaker systems

Procurement Notes

Verify the specific package type matches the design requirements, as the TDA8922C series includes both HSOP24 and DBS23P variants. Confirm that the ordering suffix corresponds to the correct packaging format intended for the assembly process. Ensure compatibility with existing pin layouts if replacing legacy components like the TDA8950/20C. Check for any specific marking or labeling requirements associated with the N1 designation.

Selection Notes

Select this component for applications requiring high output power efficiency and low distortion. Consider the thermal management capabilities, as the device includes Thermal FoldBack and OverTemperature Protection. Evaluate the need for external clock synchronization if multiple amplifiers are used to avoid beat tones. Ensure the supply voltage range aligns with the system's power rails and that the load impedance matches the expected output power specifications.

Part Context

The TDA8922CJ/N1 belongs to the TDA8922C family of Class D audio power amplifiers. It is designed for high-performance audio applications where efficiency and power density are critical. The device integrates high-power switches, drivers, and control logic on a single chip, reducing the external component count. It is part of NXP's portfolio of audio ICs aimed at consumer electronics and automotive audio systems.

Replacement Considerations

The datasheet explicitly states the TDA8922C is pin compatible with the TDA8950/20C for both HSOP24 and DBS23P packages. Designers can consider these parts as direct replacements provided the application parameters remain within the specified limits of the TDA8922C.

FAQ

How is pop noise-free start-up achieved?

Pop noise-free start-up is achieved by applying a slowly rising voltage to the MODE pin, typically via an RC network, to ensure a gradual transition between Mute and Operating modes.

What protection mechanisms are included?

The device includes Thermal FoldBack (TFB), OverTemperature Protection (OTP), OverCurrent Protection (OCP), Window Protection (WP), UnderVoltage Protection (UVP), OverVoltage Protection (OVP), and UnBalance Protection (UBP).