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APA4835RI-TR Datasheet

  • APA4835RI-TR

  • Stereo 2.8W Audio Power Amplifier with DC Volume Control and...

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  • 22頁

  • ANPEC

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APA4835
Stereo 2.8W Audio Power Amplifier with DC Volume Control
and Selectable Gain
Features
鈥?/div>
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Operating Voltage : 3.3V to 5V
Stereo switchable bridged/single-ended
power amplifiers
DC Volume Control Interface , 0dB to 鈥?05dB
Low Supply Current , I
DD
= 13mA at Stereo BTL
Low Shutdown Current , I
DD
= 0.7碌A(chǔ)
Bridge-Tied Load (BTL) or Single-Ended-(SE)
Modes Operation
Output Power at 1% THD+N , V
DD
=5V
General Description
The APA4835 is a monolithic integrated circuit , which
provides DC volume control , and a stereo bridged
audio power amplifiers capable of producing 2.8W
(2.2W) into 3鈩?with less than 10% (1.0%) THD+N.
APA4835 includes a DC volume control , stereo
bridge-tied and single-ended audio power amplifiers
, stereo docking outputs , and a selectable gain con-
trol , that makes it optimally fittable for notebook PC
, multimedia monitors , and other portable
applications. The attenuator range of the volume
control in APA4835 is from 0dB (DC_Vol=0.7V
DD
) to
鈥?05dB (DC_Vol=0V) with 32 steps. Both of the
depop circuitry and the thermal shutdown protection
circuitry are integrated in APA4835 , that reduces
pops and clicks noise during power up or shutdown
mode operation , and protects the chip from being
destroyed by over temperature failure. To simplify
the audio system design , APA4835 combines a ste-
reo 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. Be-
sides the low supply current design to increase the
efficiency of the amplifiers , APA4835 also features a
shutdown function which keeps the supply current
only 0.7碌A(chǔ) (typ).
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2.2W/Ch (typ) into a 3
鈩?/div>
Load
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2.0W/Ch (typ) into a 4
鈩?/div>
Load
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1.2W/Ch (typ) into a 8
鈩?/div>
Load
Output Power at 10% THD+N , V
DD
=5V
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2.8W/Ch (typ) into a 3
鈩?/div>
Load
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2.3W/Ch (typ) into a 4
鈩?/div>
Load
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1.5W/Ch (typ) into a 8鈩?Load
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Single-ended mode at 1.0% THD+N
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95mW/Ch (typ) into 32鈩?Load
Depop Circuitry Integrated
System Beep Detect
Thermal shutdown protection circuitry
High supply voltage ripple rejection
Low Crossover Distortion
PC99 Compliant
28-pin TSSOP-P (with enhanced thermal pad)
power package available
Pin Description
GND
SHUTDOWN
Gain Select
Mode
Mute
V
DD
DC Vol
GND
Right Dock
Right In
Beep In
Left In
Left Dock
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Right Out +
V
DD
Right Out -
Right Gain 2
Right Gain 1
GND
BYPASS
HP Sense
GND
Left Gain 1
Left Gain 2
Left Out -
V
DD
Left Out +
Applications
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Notebook and Desktop Computers
Multimedia Monitors
Portable Applications
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
錚?/div>
ANPEC Electronics Corp.
Rev. A.7
-
Mar., 2003
1
www.anpec.com.tw

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