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PDF APA2057A Data sheet ( Hoja de datos )
| Número de pieza | APA2057A | |
| Descripción | 2.4W Stereo Audio Power Amplifier | |
| Fabricantes | Anpec Electronics Coropration | |
| Logotipo |  |
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APA2057A
2.4W Stereo Audio Power Amplifier (with Gain Setting) & Capfree Headphone Driver
Features
• Operating Voltage
– HVDD= 3.0~3.6V
– VDD= 4.5~5.5V
• No Output Capacitor at Headphone Amplifier
Required
• Meeting VISTA Requirement
• Low Distortion
AMP mode
– THD+N=56dB, at VDD = 5V, RL = 4Ω, PO=1.5W
–
THD+N=64dB,
at
V = 5V,
DD
R=
L
8Ω,
P =0.9W
O
HP mode
– THD+N=73dB, at HVDD=3.3V, RL=16Ω
PO=125mW
– THD+N=77dB, at HVDD=3.3V, RL=32Ω,
PO=88mW
– THD+N=85dB, at HVDD=3.3V, RL=10kΩ,
VO=1.7Vrms
• Output Power at 1% THD+N
– 1.9W, at VDD = 5V, AMP mode, RL = 4Ω
–
1.2W, at V
DD
= 5V, AMP
mode,
R
L
=
8Ω
• at 10% THD+N
–2.4W at VDD = 5V, AMP mode, RL = 4Ω
–1.5W
at
V
DD
=
5V,
AMP
mode,
R
L
=
8Ω
•www.DataSheeDt4eUp.coopmCircuitry Integrated
• Internal 19-steps Gain Setting for Flexible Applica-
tion
• Thermal Shutdown Protection and Over Current
Protection Circuitry
• High Supply Voltage Ripple Rejection
• Surface-Mount Packaging
– TSSOP-28P (with enhanced thermal pad)
– TQFN5x5-28 (with enhanced thermal pad)
• Lead Free Available (RoHS Compliant)
General Description
The APA2057A is a monolithic integrated circuit, which
combines a stereo power amplifier and a stereo output
capacitor-less headphone amplifier. The stereo power
amplifier provides 19-steps gain setting for flexible
application. The headphone amplifier is ground-refer-
ence output, and no need the output capacitors for DC
blocking. The advantages of eliminating the output ca-
pacitor are saving the cost, PCB’s space and component
height.
Both the de-pop circuitry and the thermal shutdown
protection circuitry are integrated in the APA2057A,
which reduces pops and clicks noise during power on/
off and in shutdown mode. Thermal shutdown protects
the chip from being destroyed by over-temperature
failure. To simplify the audio system design in notebook
computer applications, the APA2057A provides the in-
ternal gain setting, and these features can minimize
components and PCB area.
The APA2057A is available in both TSSOP-28P and
TQFN5x5-28 packages. Both packages are character-
ized by space saving and thermal efficiency.
Applications
• Note book PCs
• LCD monitor
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.1 - Aug., 2007
1
www.anpec.com.tw
1 page  
APA2057A
Electrical Characteristics (Cont.)
VDD = 5V, HVDD = 3.3V, GND = PGND = CPGND = 0V, TA= 25°C (unless otherwise noted).
Symbol
Parameter
Test Condition
Headphone mode (Cont.)
S/N
Vn
Rf
Charge Pump
Fosc
CVSS
Req
Beep
Vbeep
TRES
Attenuation
Att(HP_EN)
Att(AMP_EN)
Noise Output
Voltage
Input Feedback
Resistance
Switching frequency
Charge Dump
Output Voltage
(CVSS)
Charge pump
requirement
resistance
Beep trigger level
Beep response time
HP disable
attenuation
AMP disable
attenuation
Att_SD(HP_EN)
www.DataSheet4U.com
Shutdown active
Att_SD(AMP_EN) Shutdown active
Headphone to Speaker Crosstalk
X’talk
Channel Separation
Speaker to Headphone Crosstalk
X’talk
Channel Separation
Amplifier Start up Time
Tstart-up
Start up time
With A-weighted Filter
PO = 70mW, RL =32Ω
VO =1.2Vrms, RL=10kΩ
CB =2.2µF
No load
RL = 32Ω, VO = 1.1Vrms, Fin = 1KHz
RL = 10KΩ, VO = 1.1Vrms, Fin = 1KHz
RL = 8Ω, VO = 2Vrms, Fin = 1KHz
RL = 4Ω, VO = 2Vrms, Fin = 1KHz
RL = 10KΩ on the Headphone Mode,
VO = 1.1Vrms, Fin = 1KHz
RL = 8Ω on the AMP Mode, VO = 1Vrms,
Fin = 1KHz
AMP_EN = 0V, RL = 8Ω
HP_EN = 5V, RL = 16Ω, Fin = 1KHz,
PO = 125mW
HP_EN = 5V, RL = 10KΩ
AMP_EN = 0V, RL = 4Ω, Fin = 1KHz,
PO = 1.5W
APA2057A
Min. Typ. Max.
95
92
30
38 40 42
460 540 620
-0.98
VDD
9 12
3
4
115
85
112
112
90
100
85
80
120
Unit
dB
µV
(rms)
kΩ
KHz
V
Ω
VPP
ms
dB
dB
dB
dB
dB
dB
dB
dB
msec
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Aug., 2007
5
www.anpec.com.tw
5 Page 
APA2057A
Typical Operating Characteristics (Cont.)
Frequency Response
+0.2 +190
+0.1
Gain +185
Phase
-0
VDD=5V
HVDD=3.3V
-0.1 RL=16Ω
Rin=39KΩ
Cin=3.3µF
PO=28mW
HP mode
-0.2
10 100 1k 10k
Frequency (Hz)
+180
+175
+170
100k 200k
THD+N vs. Output Power
10
VDD=5V
HVDD=3.3V
RL=32Ω
Rin=39KΩ
Cin=3.3µF
1
Fin=1KHz
BW<80KHz
HP mode
0.1
Stereo, in phase
Stereo, 180O
out of phase
www.DataSheet40U.0.c1o0m
Mono
50m
100m
150m
Output Power (W)
200m
Crosstalk vs. Frequency
+0
VDD=5V
-10 HVDD=3.3V
RL=32Ω
-20 Rin=39KΩ
Cin=3.3µF
-30 PO=88mW
HP mode
-40
-50
-60
-70 Right to Left
-80
-90 Left to Right
-100
20
100
1k 10k 20k
Frequency (Hz)
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Aug., 2007
11
THD+N vs. Output Power
10
VDD=5V
HVDD=3.3V
RL=32Ω
Rin=39KΩ
Cin=3.3µF
BW<80KHz
1 HP mode
0.1
0.01
1m
Fin=20KHz
Fin=20Hz
Fin=1KHz
10m 100m 200m
Output Power (W)
THD+N vs. Frequency
10
VDD=5V
HVDD=3.3V
RL=32Ω
Rin=39KΩ
1 Cin=3.3µF
PO=88mW
HP mode
0.1 BW<80KHz
0.01
BW<22KHz
0.001
20
100 1k
Frequency (Hz)
10k 20k
Output Noise Voltage vs. Frequency
100µ
10µ
Right channel
Left channel
VDD =5V
HVDD=3.3V
RL=32Ω
Rin=39KΩ
Cin=3.3µF
A-wighted
1µ HP mode
20 100
1k
Frequency (Hz)
10k 20k
www.anpec.com.tw
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet APA2057A.PDF ] | |
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