TDA8566TH/N2S,112

Overview

The TDA8566TH/N2S,112 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 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 amplifier with differential inputs and high common mode rejection ratio
• Diagnostic facility providing distortion, short-circuit, and temperature pre-warning via open-collector outputs
• Comprehensive protection including load dump, reverse polarity, thermal shutdown, and short-circuit proof operation
• Mode select switch enabling operating, mute, and standby states with low power consumption

Applications

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

Procurement Notes

Verify the specific ordering suffix N2S,112 against the manufacturer's current product status, as automotive components may undergo lifecycle changes. Confirm that the HSOP20 package variant matches the required PCB footprint and thermal management strategy for the target application environment.

Selection Notes

Select this component for applications requiring high output power in a compact stereo BTL format. Ensure the design accommodates the fixed 26 dB gain and utilizes the MODE pin for proper startup sequencing to prevent switch-on plops. Verify that the external component count aligns with the requirement for minimal bootstrap capacitors and compensation networks.

Part Context

The TDA8566 series comprises integrated Class-B amplifiers available in multiple packages, including the 20-lead HSOP20 (TDA8566TH), 24-lead HSOP24 (TDA8566TH1), and 17-pin DIL-bent-SIL (TDA8566Q). The TH variant specifically denotes the small outline plastic package with heatsink capabilities suitable for surface mount assembly.

Replacement Considerations

The TDA8566TH1 is pin-compatible with the I2C-bus controlled TDA1566TH for board layout purposes. No other direct substitutes are explicitly confirmed in the provided documentation.