LM3886: #1) BR100 - 100W Bridge AB Amp

Summary

While bridged amplifier configurations are able to provide high power levels, they also consume four times more power than a conventional single-ended solution. However, it is feasible to conservatively design a 100W bridged amplifier solution, as will be shown here.

The bridged solution is designed to drive an 8Ω nominal load for self-powered speaker or powered subwoofer applications.

Specifications

Manufacturer	Texas Instruments
Category	Audio Amplifiers
Eval Board	Board not Stocked
Amplifier Type	Class AB
Number of Outputs	Mono
Output Power (RMS) @ Load	100 W @ 8 Ω
Voltage In	±10 ~ ±42 V
THD+N (1kHz) @ Conditions	< 0.002% @ 100W (8 Ω, ±25.5V)
Features	Mute Over Current Protection Thermal Protection Turn On/Off Depop Under Voltage Protection, Brown-Out
Efficiency @ Conditions	- Not Given
Standby Current [Typical]
Quiescent Current [Typical]
Component Count + Extras	18 + 0
Application / Target Market	Audio: Home Theater Systems Audio: Powered Speakers
Design Author	Texas Instruments
Main I.C. Base Part	LM3886
Quiescent Current [Maximum]	106 mA
Standby Current [Maximum]
Date Created By Author
Date Added To Library	2011-03