The YD1502 is a high efficiency stereo Class-D audio
amplifier with adjustable power limit function and
dynamic temperature control. The loudspeaker driver
operates from 8~26V supply voltage and analog circuit
operates at 3.3V supply voltage. It can deliver 20W/CH
output power into 8Ω loudspeaker within 0.2% THD+N
and without external heat sink when playing music.
YD1502 provides parallel BTL (Mono) application, and
it can deliver 40W into 4Ω loudspeaker within 0.11%
THD+N. The adjustable power limit function allows user
to set a voltage rail lower than half of 3.3V to limit the
amount of current through the speaker.
Output DC detection prevents speaker damage from
long-time current stress. The dynamic temperature
control is a gain control system. As chip junction
temperature higher than a warning level, the gain level
will decrease until junction temperature lower than the
warning level.