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Электронный компонент: FAN7024

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2003 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
Continuous Average Power is 675mW (8
)
Low THD: Typical 0.3% @ Po=500mW
PSRR@217Hz, Input Terminated : 60dB
Do Not Need Output Coupling Capacitor or Bootstrap
Capacitor
Low Shutdown Current: Typical 0.1
A
Shutdown: High Active
Click & Pop Suppression circuitry
Built in TSD Circuit
Typical Applications
Cellular Phone
PDA
Portable Audio Systems
Description
The FAN7024 is a bridge connected audio power amplifier
capable of delivering 675mW of continuous average power
to an 8
load with less than 0.3%(THD) from a 5V power
supply. The FAN7024 requires few external components and
operates on low supply voltage from 2.3V to 5.5V. Since the
FAN7024 does not require output coupling capacitors,
bootstrap capacitors, or snubber networks, it is ideally suited
for low power portable systems that require minimum
volume and weight. The FAN7024 features an externally
controlled gain and low power consumption shutdown mode
(0.1uA,typ.). Additional FAN7024 features include thermal
shutdown protection, unity gain stability, and external gain
set.
8MSOP
1
10MLP
1
BOTTOM VIEW
Internal Block Diagram
20K
20K
BIAS
&
Shutdown
100K
100K
IN-
IN+
BP
VDD
SD
GND
VO1
VO2
VDD/2
4
3
2
6
1
7
8
5
FAN7024
675mW CMOS Mono Power Amplifier with
Shutdown
FAN7024
2
Pin Assignments
Pin Definitions
Pin Number
Pin Name
Pin Function Description
1(1)
SD
Shutdown. Hold high to shutdown, hold low for normal operation
2(2)
BP
Bypass. Tap to voltage divider for internal mid-supply bias
3(4)
IN+
Noninverting input
4(5)
IN-
Inverting input
5(6)
V
O1
Power amplifier output1
6(8)
V
DD
Supply voltage input
7(3)
GND
Ground connection for circuitry
8(10)
V
O2
Power amplifier output2
8
7
6
5
1
2
3
4
SD
BP
IN-
V
O1
V
DD
V
O2
IN+
GND
0 2 4
YWW
8MSOP
10MLP
(BOTTOM VIEW)
1
2
3
4
5
10
9
8
7
6
SD
V
O2
BP
GND
IN+
IN-
NC
V
DD
NC
V
O1
( ) : 10MLP
FAN7024
3
Absolute Maximum Ratings
(Note 2)
Recommended Operating Conditions
(Note 2)
Parameter
Symbol
Value
Unit
Remark
Maximum Supply Voltage
V
DD
6.0
V
Input Voltage
V
IN
-0.3 ~ V
DD
+0.3
V
Power Dissipation
P
D
Internally Limited
W
Storage Temperature
T
STG
-65 ~ +150
C
Junction Temperature
T
J
150
C
Thermal Resistance
Junction to Ambient
Rthja
190
C/W
8MSOP
166
10MLP, Single-Layer
50
10MLP, Multi-Layer
Parameter
Symbol
Min.
Typ.
Max.
Unit
Operating Supply Voltage
V
DD
2.3
-
5.5
V
Operating Temperature
T
OPR
-40
-
85
C
FAN7024
4
Electrical Characteristics
(Note1,2)
(R
L
= 8
, Ta = 25
C,
unless otherwise specified)
Note 1 : All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 2 : Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended Operating
Conditions indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical
Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific
performance limits. This assumes that the device is whitin the Operating Ratings. Specifications are not guaranteed for
parameters where no limit is given, however, the typical value is a good indication of device performance.
Parameter
Symbol
Conditions
Min. Typ. Max.
Unit
V
DD
= 5.0V,
UNLESS OTHERWISE SPECIFIED
Quiescent Power Supply Current
I
DD
V
IN
= 0V,I
O
= 0A
-
2.3
5.5
mA
Shutdown Current
I
SD
V
SD
= V
DD
-
0.1
1.0
A
Output Offset Voltage
V
OS
V
IN
= 0V
-
0
50
mV
Output Power
P
O
THD = 1%(Max.), f = 1kHz
-
675
-
mW
Total Harmonic Distortion+Noise
THD+N
P
O
= 500mW
rms
, Av=6dB,
20Hz<f<20kHz, BW<80kHz
-
0.2
-
%
Power Supply Rejection Ratio
PSRR
V
ripple
=200mV
sinp-p
dB
f=217Hz(Terminated input)
-
63
-
f=1kHz(Terminated input)
-
65
-
f=217Hz(Unterminated input)
-
70
-
f=1kHz(Unterminated input)
-
70
-
V
DD
= 3.3V,
UNLESS OTHERWISE SPECIFIED
Quiescent Power Supply Current
I
DD
V
IN
= 0V,I
O
= 0A
-
1.9
4
mA
Shutdown Current
I
SD
V
SD
= V
DD
-
0.1
1.0
A
Output Offset Voltage
V
OS
V
IN
= 0V
-
0
50
mV
Output Power
P
O
THD = 1%(Max.), f = 1kHz
-
265
-
mW
Total Harmonic Distortion+Noise
THD+N
P
O
= 250mW
rms
, Av=6dB,
20Hz<f<20kHz, BW<80kHz
-
0.3
-
%
Power Supply Rejection Ratio
PSRR
V
ripple
=200mV
sinp-p
dB
f=217Hz(Terminated input)
-
63
-
f=1kHz(Terminated input)
-
65
-
f=217Hz(Unterminated input)
-
70
-
f=1kHz(Unterminated input)
-
70
-
V
DD
= 2.6V,
UNLESS OTHERWISE SPECIFIED
Quiescent Power Supply Current
I
DD
V
IN
= 0V,I
O
= 0A
-
1.7
3.5
mA
Shutdown Current
I
SD
V
SD
= V
DD
-
0.1
1.0
A
Output Offset Voltage
V
OS
V
IN
= 0V
-
0
50
mV
Output Power
P
O
THD = 1%(Max.), f = 1kHz
-
130
-
mW
Total Harmonic Distortion+Noise
THD+N
P
O
= 100mW
rms
, Av=6dB,
20Hz<f<20kHz, BW<80kHz
-
0.4
-
%
Power Supply Rejection Ratio
PSRR
V
ripple
=200mV
sinp-p
dB
f=217Hz(Terminated input)
-
63
-
f=1kHz(Terminated input)
-
65
-
FAN7024
5
Typical Application Circuit
External Components Descriptions
Components
Functional Descriptions
1. R
I
The inverting input resistor which sets the closed-loop gain in conjunction with Rf. This
resistor also forms a high pass filter with C
I
at fc=1/(2
R
I
C
I
)
2. C
I
The input coupling capacitor blocks the DC voltage at the amplifier's input terminals. Also
creates a high pass with R
I
at fc=1/(2
R
I
C
I
). Refer to the section, Proper Selection of
External Components, for an explanation of how to determine the value of C
I
.
3. R
F
The feedback resistor which sets closed-loop gain in conjunction with R
I
.
4. C
S
The supply bypass capacitor which provides power supply filtering. Refer to the
Application Information section for proper placement and selection of the supply
bypass capacitor.
5. C
B
The bypass pin capacitor which provides half-supply filtering. Refer to the Proper
Selection of External Components
section for information concerning proper placement
and selecting C
B
's value.
R
F
20K
20K
R
I
0.39uF
C
I
V
DD
NC
R
L
8
/16/32
1uF
C
B
10uF
C
S
20K
20K
20K
BIAS
&
Shutdown
100K
100K
IN-
IN+
BP
VDD
SD
GND
VO1
VO2
VDD/2
4
3
2
6
1
7
8
5