MAX98306EVKIT#: Stereo 3.2W @ 4Ω, Class D

Summary

The MAX98306 stereo 3.7W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (6dB, 9dB, 12dB, 15dB, and 18dB) set by a single gain-select input (GAIN).

Active emissions limiting, edge-rate, and overshoot control circuitry combined with a filterless spread-spectrum modulation scheme (SSM) provide excellent EMI performance while eliminating the need for output filtering found in traditional Class D devices. These features reduce application component count.

The IC's 2.0mA quiescent current with a 3.7V supply extends battery life in portable applications.

The MAX98306 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX98306 stereo 3.2W Class D amplifier. The EV kit operates from a single 2.6V to 5.5V DC power supply and is capable of delivering 3.2W into a 4Ω load. The EV kit accepts a differential or single-ended audio input and provides differential outputs for the speaker. The device outputs can be connected directly to a speaker load for filterless applications. However, a filter can be added to ease evaluation.

Specifications

Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Audio Amplifiers
Eval Board Part Number	MAX98306EVKIT#-ND
Eval Board Supplier	Analog Devices Inc./Maxim Integrated
Eval Board	Normally In Stock
Amplifier Type	Class D
Number of Outputs	Stereo
Output Power (RMS) @ Load	3.2 W x 2 @ 4 Ω
Voltage In	2.6 ~ 5.5 V
THD+N (1kHz) @ Conditions	< 0.1% @ 2.1W (4 Ω + 33uH, 5V) < 0.1% @ 550 mW (8 Ω + 68uH, 3.7V) < 10% @ 2.9W (4 Ω + 33uH, 5V) < 10% @ 900 mW (8 Ω + 68uH, 3.7V)
Features	Digital Gain Filterless Output Frequency Jitter for EMI Over Current Protection Short Circuit Protection Shutdown, Enable, Standby Thermal Protection Turn On/Off Depop Under Voltage Protection, Brown-Out
Efficiency @ Conditions	>92%, 1.7 W @ 8 Ω, 5 V >85%, 2.9 W @ 4 Ω, 5 V
Standby Current [Typical]	1 µA
Quiescent Current [Typical]	2 mA
Component Count + Extras	9 + 20
Application / Target Market	Audio: MP3 Players Cell Phones Portable Devices
Design Author	Maxim Integrated Products
Main I.C. Base Part	MAX98306
Quiescent Current [Maximum]	2.7 mA
Standby Current [Maximum]	10 µA
Date Created By Author
Date Added To Library	2012-03