APA2603B Datasheet, PDF (1/24 Pages) Anpec Electronics Coropration – 2.5W Stereo Class-D Audio Power Amplifier

APA2603B
2.5W Stereo Class-D Audio Power Amplifier
(with DC Volume Control)
Features
General Description
• Operating Voltage: 3.3V-5.5V
• High Efficiency 85% at P_O=2.5W, 4Ω Speaker,
V_DD=5V
• Filter-Free Class-D Amplifier
• Low Shutdown Current
-
I_DD=1µA
at
V =5V
DD
• 64 Steps Volume Adjustable from -80dB to
+20dB by DC Voltage with Hysteresis
• Output Power at THD+N=1%
2.5W at V_DD=5V, R_L=4Ω
• Less External Components Required
• Internal AGC Function
• Input signal and output signal in phase
• Thermal and Over-Current Protections with
Auto-Recovery
• Lead Free and Green Device Available (RoHS
Compliant)
• Power Enhanced Packages SOP-16 and QFN4x4-
20A
Applications
• LCD TVs
• DVD Player
• Active Speakers
The APA2603B is a stereo, high efficiency, filter-free Class-
D audio amplifier available in a SOP-16, QFN4x4-20A
package.
The APA2603B provide the precise DC volume control,
the gain range is from -80dB (V_VOLUME=5V) to +20dB
(V_VOLUME=0V) with 64 steps precise control. It’s easy to get
the suitable amplifier’s gain with the 64 steps gain setting.
The filter-free architecture eliminates the output filters
compared to the traditional Class-D audio amplifier, and
reduces the external component counts and the compo-
nents high, it could save the PCB space, system cost,
simplifies the design and the power loss at filter.
APA2603B provides an internal AGC (Non-Clip) function,
and this function can low down the dynamic range for
large input signal. APA2603B can provide from 20dB to -
80dB with 64 steps gain decrease for non-clipping
function, and this function can avoid output signal clipping.
The APA2603B also integrates the de-pop circuitry that
reduces the pops and click noises during power on/off or
shutdown enable process.
The APA2603B has build-in over-current and thermal pro-
tection that prevent the chip being destroyed by short cir-
cuit or over temperature situation.
Simplified Application Circuit
Stereo Input
Signals
DC Volume
Control
ROUT-
RIN
ROUT+
LIN
APA2603B
VOLUME
LOUT+
LOUT-
Stereo
Speakers
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.
1
Rev. A.5 - Feb., 2013
www.anpec.com.tw