MAX9709ETN+TD

Audio Amplifiers Overview

The MAX9709ETN+TD is a stereo/mono Class D audio power amplifier delivering up to 2 x 25W into an 8Ω load in stereo mode and 1 x 50W into a 4Ω load in mono mode. It operates from a single +10V to +22V supply with up to 87% efficiency. The device features fully differential inputs, four selectable gain settings (22dB, 25dB, 29.5dB, 36dB), and comprehensive click-and-pop suppression. It includes a programmable thermal flag with seven thresholds, short-circuit protection, and clock synchronization capabilities.

Audio Amplifiers Feature Summary

• Filterless Class D architecture utilizing unique spread-spectrum modulation to reduce EMI radiated emissions without external output filters.
• Fully differential input structure that suppresses common-mode noise and eliminates the need for input coupling capacitors.
• Integrated thermal sensor with pin-programmable warning thresholds and automatic shutdown or mute functions during fault conditions.

Audio Amplifiers Applications

• LCD TVs
• PDP TVs
• PC/HiFi Audio Solutions

Audio Amplifiers Procurement Notes

Verify the specific suffix 'TD' against official documentation to confirm tape-and-reel packaging and exact temperature range specifications. Ensure compatibility with the required digital logic levels if operating PVDD above 12V. Confirm lead-free status and RoHS compliance through current manufacturer declarations before finalizing procurement.

Audio Amplifiers Selection Notes

Select this component for high-power audio applications requiring efficient heat dissipation and minimal board space due to its filterless design. Consider the four pin-selectable gain options and differential input compatibility when interfacing with various CODECs. Evaluate the spread-spectrum mode benefits for systems sensitive to electromagnetic interference.

Audio Amplifiers Part Context

This part belongs to the Maxim Integrated MAX9709 series of high-efficiency Class D amplifiers. It is designed to provide Class AB performance characteristics with superior energy efficiency. The device integrates advanced modulation techniques and robust protection features suitable for demanding consumer electronics environments.

Audio Amplifiers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

Audio Amplifiers FAQ

How does the MAX9709 handle EMI without an output filter?

The MAX9709 utilizes a unique spread-spectrum modulation (SSM) mode that randomizes the switching frequency by ±4%. This flattens the wideband spectral components, significantly reducing radiated EMI compared to fixed-frequency operation.

What is the function of the TEMP pin?

The TEMP pin is an open-drain thermal flag output. It pulls low when the junction temperature exceeds a user-programmable threshold, allowing the system to reduce power or shut down the device to prevent damage.