IS31AP2110
Integrated Silicon Solution, Inc. – www.issi.com 1
Rev. B, 10/20/2015
20W STEREO CLASS-D AUDIO AMPLIFIER WITH POWER LIMIT
AND DYNAMIC TEMPERATURE CONTROL
November 2015
GENERAL DESCRIPTION
The IS31AP2110 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 8 loudspeaker within 0.2% THD+N
and without external heat sink when playing music.
IS31AP2110 provides parallel BTL (Mono) application,
and it can deliver 40W into 4 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.
The output short circuit and over temperature
protection include auto-recovery feature.
The IS31AP2110 is available in a thermally enhanced
eTSSOP-28 package.
FEATURES
Single supply voltage
- 8V ~ 26V for loudspeaker driver
- Built-in LDO output 3.3V for others
Loudspeaker power from 24V supply
- BTL Mode: 20W/CH into 8Ω @0.2% THD+N
- PBTL Mode: 40W/CH into 4Ω @0.11% THD+N
Loudspeaker power from 13V supply
- BTL Mode: 10W/CH into 8Ω @10% THD+N
87% efficient Class-D operation eliminates need
for heat sink
Differential inputs
Four selectable, fixed gain settings
Internal oscillator
Short-Circuit protection with auto recovery option
Under-voltage detection
Over-voltage protection
Pop noise and click noise reduction
Adjustable power limit function for speaker
protection
Output DC detection for speaker protection
Filter-Free operation
Over temperature protection with auto recovery
Dynamic temperature control prevents chip from
over heating
APPLICATIONS
TV audio
Bluetooth speaker system
Docking speaker system
Consumer audio equipment
