MAX9788EVKIT+: 2.4W x 1 @ 8Ω, 2.7 ~ 5.5V, Class G

Summary

The MAX9788 evaluation kit (EV kit) is a fully assembled and tested PCB that uses the MAX9788 Class G amplifier to drive a bridge-tied-load (BTL) ceramic speaker in portable audio applications.

Designed to operate from a 2.7V to 5.5VDC power supply, the EV kit accepts a single-ended or differential input signal and provides a fully differential output capable of delivering greater than 14VP-P into a ceramic speaker.

The MAX9788 features a mono Class G power amplifier with an integrated inverting charge-pump power supply specifically designed to drive the high capacitance of a ceramic loudspeaker. The charge pump can supply greater than 700mA of peak output current at 5.5VDC, guaranteeing an output of 14VP-P.

The MAX9788 maximizes battery life by offering high-performance efficiency. Maxim’s proprietary Class G output stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associated with Class D amplifiers.

Specifications

Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Audio Amplifiers
Eval Board Part Number	MAX9788EVKIT+-ND
Eval Board Supplier	Analog Devices Inc./Maxim Integrated
Eval Board	Normally In Stock
Amplifier Type	Class G
Number of Outputs	Mono
Output Power (RMS) @ Load	2.4 W @ 8 Ω
Voltage In	2.7 ~ 5.5 V
THD+N (1kHz) @ Conditions	< 0.08% @ 4.0 Vrms (ZL = 1uF + 10 Ω)
Features	Differential Inputs Shutdown, Enable, Standby Soft Start Turn On/Off Depop
Efficiency @ Conditions	- Not Given
Standby Current [Typical]	300 nA
Quiescent Current [Typical]	8 mA
Component Count + Extras	17 + 6
Application / Target Market	Audio: MP3 Players Cell Phones Computers Handheld games Portable Devices
Design Author	Maxim Integrated Products
Main I.C. Base Part	MAX9788
Quiescent Current [Maximum]	12 mA
Standby Current [Maximum]	5 µA
Date Created By Author	2007-08
Date Added To Library	2014-02