APA2011/2011A
2.8W Mono Class D Audio Power Amplifier with AGC
Features
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Operating Voltage: 2.4V-5.5V
High Efficiency up to 90%
Supply Current
–I
DD
=3mA at V
DD
=5V
–I
DD
=2.5mA at V
DD
=3.6V
Low Shutdown Current
–
I
DD
=1µA at V
DD
=5V
Output Power
at 1% THD+N
–
1.3W, at V
DD
=5V, R
L
=8Ω
–
0.6W, at V
DD
=3.6V, R
L
=8Ω
–
2.0W, at V
DD
=5V, R
L
=4Ω
–
1.0W, at V
DD
=3.6V, R
L
=4Ω
at 10% THD+N
–
1.6W, at V
DD
=5V, R
L
=8Ω
–
0.8W, at V
DD
=3.6V, R
L
=8Ω
–
2.8W, at V
DD
=5V, R
L
=4Ω (WLCSP-9)
–
2.4W, at V
DD
=5V, R
L
=4Ω
General Description
The APA2011/2011A is a mono, filter-free Class-D audio
amplifier available in WLCSP1.5x1.5-9 or TDFN3x3-8
package.
The default gains without the external input resistor is
27dB. Besides, the gain can be low down by external
input resistance. APA2011 provides an Dynamic-Range-
Control (DRC) function, and this function can low down
the dynamic range for large input signal. APA2011 can
provide maximun 15dB gain control. APA2011A can pro-
vide maximum 15dB gain decrease for non-clipping
function, and this function can avoid output signal clipping.
High PSRR and differential architecture provide increased
immunity to noise and RF rectification. In addition to these
features, a fast start-up time and small package size
make the APA2011/2011A an ideal choice for portable
devices.
The APA2011/2011A is capable of driving 1.6W at 5V or
0.8W at 3.6V into 8Ω. It is also capable of driving 4Ω. The
APA2011/2011A is designed with a Class-D architecture
and operating with highly efficiency compared with Class-
AB amplifier. It’ suitable for power sensitive application,
s
such as battery-powered devices. The filter-free architec-
ture eliminates the output filter, reduces the external com-
ponent count, board area, and system costs, and simpli-
fies the design.
Moreover, the APA2011/2011A provides thermal and short
circuit protection.
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–
1.2W, at V
DD
=3.6V, R
L
=4Ω
APA2011 Dynamic Range Control (DRC) Provide
Maximum 15dB Control (2:1 Compression Ratio)
APA2011A Non-Clip Function can Provide Maxi-
mum 15dB Control (Gain Decreasing)
Less External Components Required
Fast Start-up Time (4ms)
High PSRR: 70dB at 217Hz
Thermal and Over-Current Protections
Space Saving Packages
WLCSP1.5x1.5-9 Bump, TDFN3x3-8
Lead Free and Green Devices Available
(RoHS Compliant)
Simplified Application Circuit
INP
OUTP
Audio
Speaker
Applications
Audio Input
Signals
APA2011/2011A
INN
OUTN
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Mobil Phones
Handset
PDAs
Portable Multimedia Device
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
©
ANPEC Electronics Corp.
Rev. A.4 - Aug., 2013
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
