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PDF FAN7031 Data sheet ( Hoja de datos )
| Número de pieza | FAN7031 | |
| Descripción | 2W Stereo Power Amplifier with Four Selectable Gain Setting and Headphone Drive | |
| Fabricantes | Fairchild Semiconductor | |
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www.fairchildsemi.com
FAN7031
2W Stereo Power Amplifier with Four Selectable
Gain Setting and Headphone Drive
Features
• 1.85WRMS and 2.45WRMS Power Per Each Channel Into
4Ω Load With Less Than 1% and 10% THD+N,
Respectively
• Selectable Gain Via Internal Gain Control Circuit Which
Eliminates External Gain Setting Resistors : 6dB, 10.3dB,
15.6dB, 21.6dB(Select)
• Low Quiescent Current : Typical 5.5mA@5V
• Low Shutdown Current : Typical 0.04µA@5V
• Fully Differential Input, Which Immunes the Common
Mode Noise
• Stereo Headphone Drive
• Active Low Shutdown Logic
• Guaranteed Stability Under No Load Condition
• Thermally Enhanced Surface-Mount 20TSSOP-EP
Package
Description
The FAN7031 is a dual fully differential power amplifier in a
20-pin TSSOP-EP thermally enhanced package. When
delivering 1.85W of continuous RMS power into 4Ω speaker
at 5V supply, the FAN7031 has less than 1% of THD+N over
the entire audible frequency range, 20Hz to 20kHz. To save
power consumption in the portable applications, the
FAN7031 provides shutdown function. Setting the shutdown
pin to ground level, the FAN7031 falls into shutdown mode
and consumes less than 4µA over all supply voltage range,
2.7V to 5.5V. Two gain setting pins(G0 and G1) control the
gain of the FAN7031. The gain is selectable to 6dB, 10dB,
15.6dB and 21.6dB. The FAN7031 provides the single-
ended(SE) operation by setting SE/BTL pin to above VDD/2.
Using SE/BTL pin and a mechanical switch which provides
at the headphone jack, SE mode and BTL mode are automat-
ically determined. Additional components such as resistors
for gain setting and bootstrap capacitors are not needed,
making the FAN7031 well suited for portable sound systems
and other hand-held sound equipment. Target applications
include notebook and desktop computers and portable audio
equipment.
20-TSSOP-EP
1
©2003 Fairchild Semiconductor Corporation
Rev. 1.0.1
1 page  
Electrical Characteristics
(VDD = 5.0V, Ta = 25°C, unless otherwise specified)
FAN7031
Parameter
Symbol
Conditions
Min. Typ. Max. Unit
Offset Voltage
VOFF RL=4Ω, Av=6dB
-25 - 25 mV
Supply Current
IDD No Input, No Load
- 5.5 10 mA
Shutdown Current
ISD SD = GND
- 0.04 4 µA
Output Power
PO
THD+N =1%, RL = 4Ω, f = 1kHz
THD+N =10%, RL = 4Ω, f = 1kHz
- 1.85 -
- 2.45 -
W
W
SE/BTL=GND, G0=GND, G1=GND,
Vin=4Vpp, No Load
-
6
- dB
BTL Mode Gain
SE/BTL=GND, G0=GND, G1=VDD,
Vin=2.44Vpp, No Load
-
10.3
-
Av
SE/BTL=GND, G0=VDD, G1=GND,
Vin=1.34Vpp, No Load
-
15.6
-
dB
dB
SE/BTL=GND, G0=VDD, G1=VDD,
Vin=0.66Vpp, No Load
-
21.3
-
dB
SE Mode Gain
SE/BTL=VDD,
Vin=2.44Vpp, No Load
- 4.3 - dB
Total Harmonic Distortion + Noise THD+N PO = 1W, RL=4Ω, f = 20kHz
- 0.2 0.75 %
Power Supply Rejection Ratio
PSRR
Cbyp = 0.47µF, RL=4Ω, BTL Mode,
∆VDD=500mVpp, f = 1kHz
40
70
-
dB
Electrical Characteristics (Continued)
(VDD = 3.3 V, Ta = 25°C, unless otherwise specified)
Parameter
Offset Voltage
Supply Current
Shutdown Current
Output Power
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Symbol
VOFF
IDD
ISD
PO
THD+N
PSRR
Conditions
RL=4Ω, Av=6dB
No Input, No Load
SD = GND
THD+N =10%, RL = 4Ω, f=1kHz
PO = 0.5W, RL = 4Ω, f = 20kHz
Cbyp = 0.47µF, RL=4Ω, BTL Mode,
∆VDD=330mVpp, f = 1kHz
Min.
-25
-
-
-
-
40
Typ.
-
4.3
0.08
1.02
0.2
Max.
25
8
4
-
0.75
70 -
Unit
mV
mA
µA
W
%
dB
Electrical Characteristics (Continued)
(VDD = 2.7 V, Ta = 25°C, unless otherwise specified)
Parameter
Offset Voltage
Supply Current
Shutdown Current
Output Power
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Symbol
VOFF
IDD
ISD
PO
THD+N
PSRR
Conditions
RL=4Ω, Av=6dB
No Input, No Load
SD = GND
THD+N =10%, RL = 4Ω, f=1kHz
PO = 0.25W, RL = 4Ω, f = 20kHz
Cbyp = 0.47µF, RL=4Ω, BTL Mode,
∆VDD=270mVpp, f = 1kHz
Min.
-25
-
-
-
-
-
Typ.
-
4.1
0.04
0.54
0.2
Max.
25
7
4
-
0.75
65 -
Unit
mV
mA
µA
W
%
dB
5
5 Page 
Performance Characteristics(Continued)
FAN7031
5.5m
5.0m
BTL mode
4.5m
4.0m Single-Ended
mode
3.5m
VDD=5V
3.0m
012345
SE/BTL Pin Voltage [V]
Figure 31. IDD vs. SE/BTL Pin Voltage
4.5m
BTL mode
4.0m
3.5m
Single-Ended
mode
3.0m
VDD=3.3V
2.5m
-0.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0
SE/BTL Pin Voltage [V]
Figure 32. IDD vs. SE/BTL Pin Voltage
3.5
4.5m
4.0m
BTL mode
3.5m
Single-Ended
3.0m mode
VDD=2.7V
2.5m
0.0 0.5 1.0 1.5 2.0 2.5
SE/BTL Pin Voltage [V]
Figure 33. IDD vs. SE/BTL Pin Voltage
3.0
0.7
0.6
VDD=5V
0.5
0.4
0.3
VDD=3.3V
0.2
VDD=2.7V
THD less than 1%
0.1 RL=8ohm
f=1kHz
0.0
0.0 0.5 1.0
Output Power [W]
Figure 34. Power Dissipation vs. Output Power
1.5
1.4
VDD=5V
1.2
1.0
0.8
0.6 VDD=3.3V
0.4 VDD=2.7V
0.2
THD less than 1%
RL=4ohm
f=1kHz
0.0
0.0 0.5 1.0 1.5
Output Power [W]
Figure 35. Power Dissipation vs. Output Power
2.0
3.0
BTL mode
2.5 f=1kHz
RL=4ohm
2.0
1.5
1.0
10% THD+N
1% THD+N
0.5
0.0
2.5 3.0 3.5 4.0 4.5 5.0
Supply Voltage [V]
Figure 36. Output Power vs. Supply Voltage
5.5
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet FAN7031.PDF ] | |
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