MAX98307EVKIT#: Mono 3.3W @ 8Ω, Class DG

Summary

The MAX98307/MAX98308 fully differential mono Class DG multilevel power amplifiers with integrated inverting charge pumps offer highly efficient, high-power audio solutions for portable applications.

Class DG multilevel modulation extends the dynamic range of the output signal by employing a charge-pumpgenerated negative rail as needed to extend the supply range. This scheme results in high efficiency over a wide output power range.

The ICs combine Maxim’s active emissions limiting edge rate and overshoot control circuitry with multilevel output modulation to greatly reduce EMI. These features eliminate the need for output filtering as compared to traditional Class D devices, reducing component count and cost.

The MAX98307 evaluation kit (EV kit) is a fully assembled and tested circuit board that evaluates the MAX98307 to drive a speaker in portable audio applications. Designed to operate from a 2.6V to 5.25V DC power supply, the EV kit is capable of delivering 3.3W into an 8Ω load. The EV kit accepts a differential or a single-ended input signal.

Specifications

Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Audio Amplifiers
Eval Board Part Number	MAX98307EVKIT#-ND
Eval Board Supplier	Analog Devices Inc./Maxim Integrated
Eval Board	Normally In Stock
Amplifier Type	Class DG
Number of Outputs	Mono
Output Power (RMS) @ Load	3.3 W @ 8 Ω
Voltage In	2.6 ~ 5.25 V
THD+N (1kHz) @ Conditions	< 1% @ 1.5 W (8 Ω + 68uH, 3.6V) < 1% @ 2.8 W (8 Ω + 68uH, 5V)
Features	Digital Gain Filterless Output Frequency Jitter for EMI Over Current Protection Over Voltage Protection Short Circuit Protection Shutdown, Enable, Standby Thermal Protection Turn On/Off Depop
Efficiency @ Conditions	>80%, 5V in @ 8 Ω, 0.3 ~ 2.1 W >80%, 3.6V in @ 8 Ω, 0.2 ~ 1.1 W
Standby Current [Typical]	200 nA
Quiescent Current [Typical]	1.85 mA
Component Count + Extras	12 + 17
Application / Target Market	Audio: MP3 Players Cell Phones Portable Devices
Design Author	Maxim Integrated Products
Main I.C. Base Part	MAX98307
Quiescent Current [Maximum]	2.7 mA
Standby Current [Maximum]	10 µA
Date Created By Author
Date Added To Library	2012-02