TDA8929T/N1,112

Overview

The TDA8929T is a controller for a two-chip Class-D audio amplifier system, manufactured by NXP USA Inc. It operates with a supply voltage range of ±15 V to ±30 V and features a total quiescent current of typically 20 mA. The device provides a fixed closed-loop voltage gain of 30 dB in Single-Ended (SE) configuration or 36 dB in Bridge-Tied Load (BTL) mode. It utilizes differential audio inputs and supports an internal switching frequency of approximately 317 kHz, adjustable via an external resistor or synchronized with an external clock. The component is housed in a 24-SO plastic small outline package.

Feature Summary

• Controller for high-efficiency Class-D audio power amplifier systems
• Fixed gain of 30 dB (SE) or 36 dB (BTL)
• Diagnostic inputs for short-circuit and temperature protection
• Supports stereo SE or mono BTL configurations

Applications

• Television sets
• Home-sound sets
• Multimedia systems
• Car audio boosters

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm packaging details such as reel quantity or tape width. Confirm that the intended application aligns with the automotive grade qualification if required. Ensure compatibility with the paired digital power stage devices like the TDA8926J or TDA8927 for complete system functionality.

Selection Notes

Select this controller when designing a two-chip Class-D amplifier requiring low quiescent current and high efficiency. Pair with TDA8926J/ST/TH for 2x50 W output or TDA8927J/ST/TH for 2x100 W output. Ensure the design accommodates the ±15 V to ±30 V supply range and includes necessary external components for oscillator frequency setting and feedback loops.

Part Context

The TDA8929T serves as the analog controller chip within a two-chip set architecture developed by Philips Semiconductors (now NXP). It works in conjunction with a digital power stage, such as the TDA8926 or TDA8927, to form a compact audio amplifier system. This combination allows for high output power with minimal heat dissipation, often eliminating the need for large heatsinks.

Replacement Considerations

Direct replacements are not explicitly listed in the provided documentation. Designers should evaluate other controllers from the TDA89xx series or comparable Class-D controllers from NXP, ensuring pinout and functional compatibility with the existing power stage.