TDA8542TS/N1,118

Overview

The TDA8542TS is a two-channel audio power amplifier delivering 2 × 0.7 W output power to a 16 Ω load at a 5 V supply, or 0.6 W to an 8 Ω load at 3.3 V. It features Bridge-Tied Load (BTL) amplifiers with complementary PNP-NPN output stages and standby/mute logic. The device operates within a supply voltage range of 2.2 V to 18 V, with a typical quiescent current of 15 mA and standby current under 10 μA. Gain is adjustable from 6 dB to 30 dB via external resistors. It includes thermal shutdown protection, short-circuit safety, and high supply voltage ripple rejection.

Feature Summary

• Bridge-Tied Load architecture with complementary PNP-NPN output stage for efficient low-voltage operation
• CMOS-compatible standby and mute control logic to minimize power consumption and suppress switch-on noise
• Integrated thermal shutdown and short-circuit protection against ground, VCC, and across the load
• Adjustable closed-loop voltage gain ranging from 6 dB to 30 dB using external feedback resistors

Applications

• Portable consumer products
• Personal computers
• Motor-driver applications such as servo systems

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing, as availability may vary by region. Confirm that the component meets the required environmental operating temperature range of -40 °C to +85 °C for your specific application design. Ensure proper PCB layout practices are followed to manage thermal resistance, particularly given the SSOP20 package constraints. Review the latest product specification document for any updates regarding pin configurations or absolute maximum ratings before finalizing the design.

Selection Notes

Select this amplifier for designs requiring dual-channel audio amplification in low-voltage environments. It is suitable for applications where space is limited due to the SSOP20 package. Consider the gain adjustment range and input impedance when designing the preceding signal conditioning circuitry. Evaluate the thermal performance requirements based on the expected ambient temperature and load impedance to ensure the junction temperature remains within safe limits during continuous operation.

Part Context

The TDA8542TS belongs to NXP's family of integrated audio power amplifiers designed for consumer electronics. It complements other devices like the TDA8541T and TDA8552T, offering similar BTL functionality but with specific power and package characteristics tailored for portable and PC-based audio systems. This component represents a solution for integrating stereo audio output without requiring discrete output transistors.

Replacement Considerations

Check for direct pin-compatible alternatives within the TDA854x series if available. Verify that any substitute maintains the same SSOP20 footprint and electrical specifications, particularly the supply voltage range and output power capabilities. Consult the manufacturer's official replacement guide for validated cross-references.