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PDF APA4835 Data sheet ( Hoja de datos )
| Número de pieza | APA4835 | |
| Descripción | Stereo 2.8W Audio Power Amplifier | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de APA4835 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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APA4835
Features
Stereo 2.8W Audio Power Amplifier with DC Volume Control
and Selectable Gain
General Description
• Operating Voltage : 3.3V to 5V
• Stereo switchable bridged/single-ended
power amplifiers
• DC Volume Control Interface , 0dB to –105dB
• Low Supply Current , IDD = 13mA at Stereo BTL
• Low Shutdown Current , IDD = 0.7µA
• Bridge-Tied Load (BTL) or Single-Ended-(SE)
Modes Operation
• Output Power at 1% THD+N , VDD=5V
– 2.2W/Ch (typ) into a 3 Ω Load
– 2.0W/Ch (typ) into a 4 Ω Load
– 1.2W/Ch (typ) into a 8 Ω Load
• Output Power at 10% THD+N , VDD=5V
– 2.8W/Ch (typ) into a 3 Ω Load
– 2.3W/Ch (typ) into a 4 Ω Load
– 1.5W/Ch (typ) into a 8Ω Load
• Single-ended mode at 1.0% THD+N
– 95mW/Ch (typ) into 32Ω 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
Applications
• Notebook and Desktop Computers
• Multimedia Monitors
• Portable Applications
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 3Ω 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=0.7VDD) to
–105dB (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 0.7µA (typ).
Pin Description
GND
SHUTDOWN
Gain Select
Mode
Mute
VDD
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 Right Out +
27 VDD
26 Right Out -
25 Right Gain 2
24 Right Gain 1
23 GND
22 BYPASS
21 HP Sense
20 GND
19 Left Gain 1
18 Left Gain 2
17 Left Out -
16 VDD
15 Left Out +
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.7 - Mar., 2003
1
www.anpec.com.tw
1 page  
APA4835
Pin Description
Pin
Name
No
VDD
6, 16, 27
DC_Vol
7
Right Dock
9
Right In
10
Beep In
11
Left In
12
Left Dock
13
Left Out +
15
Left Out -
17
Left Gain 2
18
Left Gain 1
19
HP Sense
21
Bypass
22
Right Gain 1
24
Right Gain 2
25
Right Out -
26
Right Out +
28
I/O Description
Supply voltage input pin
I Volume control function input pin.
O Right docking output pin
I Right channel audio input pin
I Beep signal input pin
I Left channel audio input pin
O Right docking output pin
O Left channel positive output pin
O Left channel negative output pin
Connect pin 2 of the external gain setting resistor for left channel
Connect pin 1 of the external gain setting resistor for left channel
I Headphone sense control pin
Bypass pin
Connect pin 1 of the external gain setting resistor for right channel
Connect pin 2 of the external gain setting resistor for right channel
O Right channel negative output pin
O Right channel positive output pin
Truth Table for Logic Inputs
Mute
0
0
0
0
1
Mode
0
0
1
1
×
HP Sense
0
1
0
1
×
DC Vol. Control Bridged Output
Fixed Level
Vol. Fixed
Fixed Level
Muted
Adjusted
Vol. Changes
Adjusted
Muted
- Muted
Single-Ended
-
Vol. Fixed
-
Vol. Changed
Muted
Copyright ANPEC Electronics Corp.
Rev. A.7 - Mar., 2003
5
www.anpec.com.tw
5 Page 
APA4835
Typical Characteristics Cont.
10
5
VDD=3.3V
RL=16Ω
Po=0.2W
2 BTL
1
0.5
0.2
0.1
0.05
0.02
0.01
20
AV=2
AV=8
AV=4
50 100 200 500 1k 2k
5k 10k 20k
Output Power (W)
10
5
VDD=3.3V
RL=4Ω
BTL
2
1
0.5
f=20kHz
0.2 f=1kHz
0.1
0.05 f=20Hz
0.02
0.01
10m
20m
50m 100m 200m
500m 1
Output Power (W)
10
5
VDD=3.3V
RL=8Ω
BTL
2
1
0.5
f=20kHz
0.2
0.1
0.05
0.02
0.01
10m
f=1kHz
f=20Hz
20m 30m 50m 80m
200m 400m 800m
Output Power (W)
10
5
VDD=3.3V
RL=16Ω
BTL
2
1
0.5 f=20kHz
0.2
0.1 f=1kHz
0.05
f=20Hz
0.02
0.01
10m
20m 30m 50m 70m
200m 500m
Output Power (W)
Copyright ANPEC Electronics Corp.
Rev. A.7 - Mar., 2003
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet APA4835.PDF ] | |
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