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PDF APA2020A Data sheet ( Hoja de datos )
| Número de pieza | APA2020A | |
| Descripción | Stereo 2-W Audio Power Amplifier | |
| Fabricantes | Anpec Electronics Coropration | |
| Logotipo |  |
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APA2020A
Stereo 2-W Audio Power Amplifier
Features
General Description
• Low Supply Current , IDD= 8mA at Stereo BTL
• Low Shutdown Current , IDD= 0.5µA
• Depop Circuitry Integrated
• Low Supply Voltage
• Thermal Shutdown Circuitry Integrated
• Output Power at 1% THD+N , VDD=5V
- 1.8 W/Ch (typ) into a 4 Ω Load
- 1.2 W/Ch (typ) into a 8 Ω Load
• Bridge-Tied Load (BTL) or Single-Ended
(SE) Modes Operation
• Various 24-Pin Power Packages Available
SOP , TSSOP-P
• High Supply Voltage Ripple Rejection
Applications
• Stereo Audio Power Amplifier for Notebook
Computer
The APA2020A is a stereo bridge-tied audio power
amplifier in various 24-pin power packages , includ-
ing SOP , TSSOP-P. When connecting to a 5V volt-
age supply , the APA2020A is capable of delivering
1.8W/1.2W of continuous RMS power per channel
into 4Ω/8Ω loads with less than 1% THD+N ,
respectively. The APA2020A simplifies design and
frees up board space for other features .
The APA2020A also served well in low-voltage
applications , which provides 800-mW per channel
into 4Ω loads with a 3.3V supply voltage . Both of the
depop circuitry and the thermal shutdown protection
circuitry are integrated in the APA2020A , that reduces
pops and clicks noise during power up and when
using the shutdown or mute modes and protects the
chip from being destroyed by over-temperature
failure.
To simplify the audio system design in notebook
computer applications , the APA2020A 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 . For
power sensitive applications , the APA2020A also
features a shutdown function which keeps the supply
current only 0.5 µA (typ) .
Ordering Information
APA2020A
Handling Code
Temp. Range
Package Code
Package Code
K : SOP
Temp. Range
I: - 40 to 85 °C
Handling Code
TU : Tube
TY : Tray
R : TSSOP-P *
TR : Tape & Reel
* TSSOP-P is a standard TSSOP package with a thermal pad exposure on the bottom of the package.
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.5 - July., 2002
1
www.anpec.com.tw
1 page  
APA2020A
Electrical Characteristics (Cont.)
AC Operating Characteristics , VDD= 3.3V , TA= 25°C , RL= 4Ω (unless otherwise noted)
Symbol
Parameter
Test Condition
APA2020A
Min. Typ. Max.
Unit
PSRR Power supply ripple rejection f =100 Hz
70 dB
Mute attenuation
85 dB
Channel-to-channel output
separation
f =1 KHz
85 dB
Line HP input separation
75 dB
BTL attenuation in SE mode
80 dB
ZI Input impedance
2 MΩ
Signal-to-noise ratio
Po = 500 mW , BTL
90 dB
Vn Output noise voltage
50 µV(rms)
Notes 2 : Output power is meaured at the output teminals of the IC at 1 KHz.
DC Electrical Characteristic , TA=25 °C
Symbol
Parameter
Test Conditions
IDD
VO (DIFF)
IDD(MUTE)
ISD
Supply Current
V DD = 5V
Stereo BTL
Stereo SE
V DD = 3.3 V Stereo BTL
Stereo SE
DC Differential Output
Voltage
V DD =5V, Gain = 2, see Note3
Supply Current in Mute Mode V DD = 5V
IDD in Shutdown
V DD = 5V
APA2020A
Typ. Max.
8 11
4 6.5
79
3.5 5.6
5 25
8 11
0.5 5
Note 3 : at 3V<VDD<5V , the DC output voltage is approximately VDD / 2.
Unit
mA
mA
mA
mA
mV
mA
µA
Copyright ANPEC Electronics Corp.
Rev. A.5 - July., 2002
5
www.anpec.com.tw
5 Page 
APA2020A
Typical Characteristics (Cont.)
10
5
2
1
%
0.5
0.2
VDD=3.3V
AV=2
RL=8Ω
BTL
PO=0.1W PO=0.25W PO=0.4W
0.1
0.06
20
50 100 200 500 1k 2k
Hz
5k
20k
f - Frequency
Figure 16
10
5
2
1
%
0.5
VDD=3.3V
AV=2
RL=8Ω
BTL
f=20KHz
0.2 f=20Hz
0.1 f=1KHz
0.06
100m 200m
500m 1
W
2
5 10
Po - Output Power
Figure 17
10
5
2
1
0.5
%
0.2
0.1
VDD=5V
PO=0.5W
RL=4Ω
SE
AV=10
AV=5
0.05
0.02
AV=1
0.01
20
50 100 200 500 1k 2k
Hz
5k
20k
f - Frequency
Figure 18
10
5
2
1
0.5
%
0.2
0.1
0.05
VDD=5V
AV=2
RL=4Ω
SE
PO=0.1W PO=0.25W PO=0.4W
0.02
0.01 20
50 100 200 500 1k 2k
Hz
5k
20k
f - Frequency
Figure 19
Copyright ANPEC Electronics Corp.
Rev. A.5 - July., 2002
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet APA2020A.PDF ] | |
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