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PDF AA4003 Data sheet ( Hoja de datos )
| Número de pieza | AA4003 | |
| Descripción | 2W STEREO AUDIO POWER AMPLIFIER | |
| Fabricantes | BCD | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AA4003 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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www.DataSheet4U.com
2W STEREO AUDIO POWER AMPLIFIER WITH SHUTDOWN
General Description
Features
Data Sheet
AA4003
The AA4003 is a Class AB stereo Audio Power Ampli- · Output Power,
fier which can deliver 2.0W into 4Ω speakers with lim-
BTL: 2.0W/CH (4Ω, THD+N≤1%)
itation of THD+N less than 1%. The chip is designed
SE: 160mW/CH (16Ω, THD+N≤1%)
specially for Portable DVD player, Portable Media · Supply Voltage Range: 2.7V to 5.5V
Player, LCD monitor and Digital Photo Frame applica- · External Feedback Loop for Flexible Gain Set-up
tions.
· Low Power Consumption at Shutdown Mode
0.7μA Typical
AA4003 is available in package of SOIC-16 and
TSSOP-20 (EDP).
·
·
SE, BTL Mode Switchable
Optimized Click/POP Noise Suppression
· Thermal Shutdown Protection
Applications
· Portable DVD Player
· Portable Media Player
· LCD Monitor
· Digital Photo Frame
SOIC-16
TSSOP-20 (EDP)
Figure 1. Packages Type of AA4003
Oct. 2007 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
1
1 page  
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2W STEREO AUDIO POWER AMPLIFIER WITH SHUTDOWN
Absolute Maximum Ratings (Note 1)
Data Sheet
AA4003
Parameter
Supply Voltage
Input Voltage
Power Dissipation
Symbol
VDD
VIN
PD
Package Thermal Resistance
RθJA
Operating Junction Temperature
Storage Temperature Range
Lead Temperature 1.6mm from Case for 10 Seconds
ESD (Human Body Model)
ESD (Machine Model)
TJ
TSTG
TLEAD
Value
6
-0.3 to VDD + 0.3
Internally limited
M Package
90
G Package
50 (Note 2)
150
-65 to 150
260
2000
300
Unit
V
V
oC/W
oC
oC
oC
V
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operation is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.
Note 2: Chip is soldered to 200mm2 copper (top side solder mask) of 1oz. on PCB with 8 x 0.5mm vias..
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Ambient Temperature
Symbol
VDD
TA
Min
2.7
-40
Max
5.5
85
Unit
V
oC
Oct. 2007 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page 
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Data Sheet
2W STEREO AUDIO POWER AMPLIFIER WITH SHUTDOWN
AA4003
Application Information
COUT
_ 220μF
+
SE/BTL Mode, HP_SENSE Pin
The AA4003 can operate under 2 types of output
configuration, BTL (Bridged-Tied-Load) mode and SE
(Single-Ended) mode, determined by HP_SENSE pin's
logic level. (Here is the discussion about left channel
only, it equally applies to right channel.)
+
20kΩ
AMP1L
Left Out-
20kΩ
_
+ Left Out+
AMP2L
RPD
1.5kΩ
Main
Speak
Headphone
Speak
R1 R2
VDD 100kΩ 100kΩ
COUT
_ 220μF
+
HP_SENSE= High Level
+
20kΩ
AMP1L
Left Out-
20kΩ
RPD
1.5kΩ
Figure 20. Output Configuration for Left Channel
_
+ Left Out+
AMP2L
R1 R2
VDD 100kΩ 100kΩ
Main
Speak
in SE Mode
When headphone plug is not inserted, the voltage of
HP_SENSE pin is determined by voltage divider
formed by R1 and RPD. For given resistor's value in
Figure 19, R1=100kΩ, RPD=1.5kΩ, DC voltage at
HP_SENSE= Low Level
SLEEVE HP_SENSE is about 74mV. AC signal equals output
HEADPHONE amplitude of OUT- through COUT, so signal at
JACK
HP_SENSE node is 74mV DC plus AC signal. The
Figure 19. Output Configuration for Left Channel maximum peak-to-peak voltage at OUT- is no greater
in BTL Mode
than VDD (supply voltage 5.0V), so the positive
When HP_SENSE pin is held low which sets the chip
in BTL mode, the AMP2L unit is turned on. AMP2L
has fixed unity gain internally, AC signal at OUT+ is
180 degree phase shifted from OUT-. Because the DC
component (Output Bias voltage, approx 1/2 VDD)
between OUT+ and OUT- is canceled, there is no
necessity to use DC block capacitors for main speak. In
BTL mode, output voltage swing across main speaker
is about 2 times that in SE mode, so there is 4 times
maximum voltage of HP_SENSE node will be no
greater than 2.5V+75mV≈2.575V, which is less than
HP_SENSE input high level minimum value (4.0V).
That means the chip is in BTL mode and there is no
risk of operation mode switch between SE and BTL.
When headphone plug is inserted, as the RPD is
disconnected from R1, the voltage of HP_SENSE pin
is pulled up by R1 to VDD and sets the chip in SE
mode.
output power compared to SE mode with same load
and input. (see Figure 19)
HP_SENSE pin can also be connected to MCU I/O
port to control the mode switch through MCU.
If applying high level to HP_SENSE pin which sets the
chip in SE mode, the AMP2L unit is in high impedance
state. There is no current loop between OUT+ and
OUT-, the main speak is naturally disabled without any
hardware change. The output audio signal rides on bias
voltage at OUT- (Output Bias voltage, approx 1/2
VDD) , so it has to use a capacitor COUT to block DC
bias and couple AC signal to headphone speak. (See
Figure 20)
It is recommended to connect HP_SENSE to the
headphone jack switch pin illustrated in Figure 19.
It is necessary to note that AA4003 still can drive
headphone even in BTL mode because OUT- is always
active whatever the chip is in SE or BTL mode.
CIN, COUT, Cb and CS (Power Supply) Selection
For input stages of AA4003, input capacitors CI is used
to accommodate different DC level between input
source and AA4003 bias voltage (about 2.31V). Input
capacitors CI and input resistors RI form a first order
High Pass Filter, which determines the lower corner
frequency according to the classic equation below,
Oct. 2007 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet AA4003.PDF ] | |
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