TDA8566TH/N2,518

Overview

The TDA8566TH/N2,518 is an integrated Class-B output amplifier designed for car radio applications. It features two amplifiers in a Bridge-Tied Load (BTL) configuration housed in a 20-lead HSOP20 plastic package (SOT418-3). The device delivers 2 × 25 W into a 4 Ω load or 2 × 40 W into a 2 Ω load at 14.4 V supply with 10% THD. It operates within a supply voltage range of 6 V to 18 V and includes differential inputs, fixed gain, and diagnostic outputs for short-circuit and temperature monitoring.

Feature Summary

• Integrated BTL stereo power amplifier with differential inputs and high common mode rejection ratio
• Diagnostic facility providing open-collector outputs for distortion clipping detection and short-circuit/temperature pre-warning
• Robust protection including load dump tolerance, reverse polarity safety, thermal shutdown, and short-circuit proof operation
• Mode select switch enabling operating, mute, and standby states with low quiescent current consumption

Applications

• Car radio power amplification
• Stereo audio systems requiring BTL configuration
• Automotive infotainment output stages

Procurement Notes

Verify the specific ordering suffix /N2,518 against the manufacturer's current product status, as automotive components often undergo lifecycle changes. Confirm that the HSOP20 package variant matches the intended PCB footprint and thermal requirements. Ensure compliance with relevant automotive environmental standards required for the target application environment.

Selection Notes

Select this component when a high-power stereo amplifier with integrated diagnostics is required for automotive use. The fixed 26 dB gain simplifies system design by reducing external component count. Consider the thermal resistance characteristics and ensure adequate heatsinking for the HSOP20 package to maintain performance under high load conditions.

Part Context

The TDA8566 series comprises integrated Class-B output amplifiers available in multiple packages, including the 20-lead HSOP20 (TDA8566TH), 24-lead HSOP24 (TDA8566TH1), and 17-pin DIL-bent-SIL (TDA8566Q). The TDA8566TH1 is pin-compatible with the I2C-controlled TDA1566TH for board layout flexibility. This family is specifically engineered for robust performance in automotive environments.

Replacement Considerations

The TDA8566TH1 is pin-compatible with the TDA1566TH for single-board layout purposes. Designers should verify if the I2C control interface of the TDA1566TH is necessary or if the fixed-gain, mode-switch controlled TDA8566TH is sufficient for the application.