TDA8543T/N1,512

Overview

The TDA8543T/N1,512 is a single-channel Bridge-Tied Load (BTL) audio power amplifier manufactured by NXP Semiconductors. It utilizes a complementary PNP-NPN output stage to deliver up to 2.2 W of output power into an 8 Ω load at a 7.5 V supply voltage. The device operates within a supply voltage range of 2.2 V to 18 V and features a standby current of 10 μA maximum. Key electrical parameters include a total harmonic distortion of 0.15% typical at 0.5 W output and a supply voltage ripple rejection of 50 dB. The component is housed in a 16-lead SO plastic small outline package (SO16).

Feature Summary

• Integrated BTL amplifier with complementary PNP-NPN output stage for high efficiency.
• Low saturation voltage on the output stage reduces power loss.
• Standby and mute modes controlled via CMOS compatible logic levels.
• Comprehensive protection against short circuits, thermal overload, and electrostatic discharge.

Applications

• Portable consumer products
• Personal computers
• Telephony systems

Procurement Notes

Verify the specific ordering suffix and package variant during procurement, as the TDA8543 series includes both DIP16 and SO16 packages. Confirm that the selected part matches the required pin configuration and thermal characteristics for the target application. Ensure compliance with RoHS directives if applicable to the manufacturing process. Check for any recent product change notifications or obsolescence notices from NXP Semiconductors before finalizing orders.

Selection Notes

Select this component for designs requiring a single-channel audio amplifier with minimal external components. The gain is adjustable between 6 dB and 30 dB using external feedback resistors. Consider the thermal resistance of the SO16 package when designing for higher ambient temperatures. The MODE pin allows for flexible control of standby and mute functions, which is useful for battery-powered applications requiring low quiescent current.

Part Context

The TDA8543 is part of NXP's legacy audio amplifier portfolio, designed for general-purpose audio amplification tasks. It serves as a bridge-tied load solution for driving speakers in low-to-medium power applications. The device is distinct from other series like the TDF8544, which offers multi-channel I2C-controlled amplification. This specific model focuses on simplicity and cost-effectiveness for basic audio systems.

Replacement Considerations

Direct replacements may include the TDA8543 in DIP16 packaging if through-hole mounting is required. Verify pin compatibility and thermal performance when substituting with other single-channel BTL amplifiers from different manufacturers. Ensure that any alternative component meets the same voltage and power specifications.

FAQ

How is the amplifier gain configured?

The closed-loop voltage gain can be set within a range of 6 dB to 30 dB by selecting appropriate external feedback resistors connected to the input pins.

What are the operating conditions for the MODE pin?

The MODE pin controls the operating mode: voltages below 0.5 V enable full operation, voltages between 1.5 V and VCC-1.5 V activate mute, and voltages above VCC-0.5 V or a floating pin engage standby mode.