1W Stereo Audio Amplifier + Adjustable Output Limiter
The LM4816 combines a bridged-connected (BTL) stereo
audio power amplifier with an adjustable output voltage mag-
nitude limiter. The audio amplifier delivers 1.0W to an 8Ω
load with less than 1.0% THD+N while operating on a 5V
power supply. With VLIM set to 1.0V, the amplifier outputs are
clamped to 6Vp-p, ±800mV.
The LM4816 features an external controlled micropower
shutdown mode and thermal shutdown protection. It also
utilizes circuitry that reduces “clicks and pops” during device
turn-on and return from shutdown.
Boomer audio power amplifiers are designed specifically to
use few external components and provide high quality output
power in a surface mount package.
j POUT (BTL):
VDD = 5V, THD = 1%, RL = 8Ω
j Power supply range
j Limiter adjustment range
j Shutdown current
3.0V to 5.5V
GND to VDD/2
n Stereo BTL amplifier
n Adjustable output voltage magnitude limiter
n “Click and pop” suppression circuitry
n Unity-gain stable audio amplifiers
n Thermal shutdown protection circuitry
n TSSOP (MT) package
n Notebook computers
n Multimedia monitors
n Desktop computers
n Portable televisions
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation DS200332