TPA112DGN

Overview

The TPA112DGN is a stereo audio power amplifier manufactured by Texas Instruments, housed in an 8-pin PowerPAD MSOP package. It delivers 150 mW of continuous RMS output per channel into 8-ohm loads. The device operates from a single supply voltage ranging from 2.5 V to 5.5 V and features externally configurable gain settings between 1 and 10 using two resistors per channel. It includes built-in thermal and short-circuit protection mechanisms.

Feature Summary

• Stereo audio amplification with independent channel control
• Integrated thermal and short-circuit protection for reliability
• Externally adjustable voltage gain via external resistors
• PowerPAD MSOP surface-mount packaging for efficient heat dissipation

Applications

• Portable audio devices requiring low-voltage operation
• Headphone amplifiers for consumer electronics
• Line-level audio signal boosting in home stereo systems
• Battery-powered multimedia equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product status documentation. Confirm that the DGN package variant matches the required thermal performance specifications for the target PCB layout. Ensure compatibility with the intended supply voltage range and load impedance before finalizing procurement orders.

Selection Notes

Select this component when a dual-channel solution is required within a compact footprint. Consider the 8-ohm load capability and the 2.5 V to 5.5 V operating range. Evaluate the need for external gain-setting resistors and input coupling capacitors based on the specific circuit topology and desired frequency response characteristics.

Part Context

This part belongs to the TPA112 family of stereo audio power amplifiers. It is designed as a high-performance CMOS solution for single-supply applications. The PowerPAD MSOP package provides a balance between small physical size and adequate thermal management for low-to-mid power audio outputs.

Replacement Considerations

Check the manufacturer's obsolescence notices for the TPA112DGN. Verify pinout compatibility if substituting with other stereo amplifiers in the same package. Review thermal resistance values to ensure equivalent heat dissipation capabilities in the existing design.

FAQ

How is the voltage gain configured for the TPA112?

The gain is set externally using two resistors per input channel, allowing for configurable settings between 1 and 10 without requiring external compensation.

What protection features are included in the TPA112?

The device incorporates built-in thermal shutdown and short-circuit protection to safeguard the amplifier under abnormal operating conditions.