APA2605 Datasheet, PDF (1/30 Pages) Anpec Electronics Coropration – 2.8W Stereo Class-D Audio Power Amplifier

APA2605
2.8W Stereo Class-D Audio Power Amplifier
(with DC Volume Control, AGC Function)
Features
General Description
• Operating Voltage: 3.3V-5.5V
• High Efficiency 85% at P_O=2.8W, 4Ω Speaker,
V =5V
DD
• Filter-Free Class-D Amplifier
• Low Shutdown Current
– I_DD=1µA at V_DD=5V
• 64 Steps Volume Adjustable from -80dB to +20dB
by DC Voltage with Hysteresis
• AGC (Non-Clip) Function
• Output Power at THD+N=1%
– 2.3W at V_DD=5V, R_L=4Ω
– 1.3W at V_DD=5V, R_L=8Ω
Output Power at THD+N=10%
– 2.8W at V_DD=5V, R_L=4Ω
–
1.6W
at
V =5V,
DD
R_L=8Ω
• Less External Components Required
• Thermal and Over-Current Protections with Auto-
Recovery
• Power Enhanced Packages SSOP-24, SOP-18,
SSOP-24P & QFN4x4-20A
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• LCD TVs
• DVD Player
• Active Speakers
The APA2605 is a stereo, high efficiency, filter-free Class-
D audio amplifier available in SOP-18, SSOP-24,
SSOP-24P, and QFN4x4-20A packages.
The APA2605 provides the precise DC volume control,
the gain range is from -80dB (V_VOLUME=0V) to +20dB
(V_VOLUME=5V) 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.
APA2605 provides an AGC (Non-Clip) function, and this
function can low down the dynamic range for large input
signal. APA2605 can provide from 20dB to -80dB with 64
steps gain decrease for non-clipping function, and this
function can avoid output signal clipping.
The APA2605 also integrates the de-pop circuitry that re-
duces the pops and click noise during power on/off or
shutdown enable process.
The APA2605 has build-in over-current and thermal pro-
tection that prevent the chip being destroyed by short-
circuit or over-temperature situation.
APA2605 is capable of driving 2.8W at 5V into 4Ω speaker.
The efficiency can archive 85% at R_L=4Ω when P_O=2.8W
at V_DD=5V.
Simplified Application Circuit
Stereo Input
Signals
DC Volume
Control
ROUTP
RINN
LINN
ROUTN
APA2605
Volume
LOUTN
LOUTP
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.7 - Mar., 2013
www.anpec.com.tw