APA2606 Datasheet, PDF (1/27 Pages) Anpec Electronics Coropration – 2.8W Stereo Class-D Audio Power Amplifier and Class AB Headphone Driver

APA2606
2.8W Stereo Class-D Audio Power Amplifier and Class AB Headphone
Driver (DC Volume Control, UVP, AGC Function)
Features
General Description
• Operating Voltage: 3.3V-5.5V
•
High
Efficiency
85%
at
P =2.8W,
O
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
• Under-Voltage Protection Function
• Output Power at THD+N=1%
BTL Mode
2.25W at V_DD=5V, R_L=4Ω
1.3W at V_DD=5V, R_L=8Ω
SE Mode
68mW at V_DD=5V, R_L=32Ω
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
• Two Output Modes Allowable with BTL and SE
Modes Selected by SE/BTL Pin
• Thermal and Over-Current Protections with Auto-
Recovery
• Power Enhanced Packages SSOP-24 and
SSOP-24P
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• LCD TVs
• DVD Player
• Active Speakers
The APA2606 is a stereo, high efficiency, filter-free Class-
D audio amplifier available in SSOP-24 and SSOP-24P
packages.
The APA2606 provides the precise DC volume control,
and the gain range is from -80dB (V =0V) to +20dB
VOLUME
(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.
APA2606 provides an AGC (Non-Clip) function, and this
function can low down the dynamic range for large input
signal. APA2606 can provide from 20dB to -80dB with 64
steps gain decrease for non-clipping function, and this
function can avoid output signal clipping.
The APA2606 also integrates the de-pop circuitry that re-
duces the pops and click noises during power on/off or
shutdown enable process.
The APA2606 has build-in over-current and thermal pro-
tection that prevent the chip being destroyed by short-
circuit or over-temperature situation.
APA2606 combines a stereo bridge-tied loads (BTL)
mode for speaker drive and a stereo single-end (SE)
mode for headphone drive into a single chip, where both
modes are easily switched by the SE/BTL input control
pin signal.
APA2606 is capable of driving 2.8W at 5V into 4Ω speaker.
The efficiency can archived 85% at R_L=4Ω when
P_O=2.8W at V_DD=5V.
APA2606 is capable of driving 60mW at 5V into 32Ω
headphone.
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.6 - MAr., 2013
www.anpec.com.tw