Description
The PAM8905 is a high efficiency Class
β
D
audio
power amplifier with
an integrated boost converter. It drives up to
1.9
W (1% THD+N) into
a
n
8Ξ©
speaker. With
85
% typical efficiency, the PAM8905 helps
extend battery life when playing audio.
The b
uilt
β
in boost converter generates the voltage rail for the output
stage. This provides a louder audio output than a stand
β
alone
amplifier connected directly to the battery. It also maintains a
consistent loudness, regardless of battery voltage.
The PAM89
05 features
battery tracking AGC
function which
adjusts
the Class
β
D gain to limit battery current at lower battery voltage
.
PAM8905 features DC input protection and a
ll outputs are fully
protected against
output
β
to
β
output shorts.
The PAM8905 is available
in
U
β
WLB1520
β
12
package
For more detail: Tiny audio amp produces 1.9 W from 5 V
