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參數(shù)資料
| 型號(hào)： | TDA7480 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 10W MONO CLASS-D AMPLIFIER |
| 中文描述： | 10W的單聲道D類(lèi)放大器 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大小： | 177K |
| 代理商： | TDA7480 |
ELECTRICAL CHARACTERISTICS
(Refer to the test circuit, V
CC
=
±
14V; R
L
= 8
; R
S
= 50
;
R
f
= 12K
; Demod.. filter L = 60
μ
H, C = 470nF; f = 1KHz; T
amb
= 25°C unless otherwise specified.)
Symbol
V
S
I
q
V
OS
P
O
Parameter
Test Condition
Min.
±
10
Typ.
Max.
±
16
40
+50
Unit
V
mA
mV
W
W
Supply Range
Total Quiescent Current
Output Offset Voltage
Output Power
R
L
=
∞
; NO LC Filter
Play Condition
THD = 10%
THD = 1%
R
L
= 4
V
CC
=
±
10.5V
THD = 10%
THD = 1%
R
f
= 12K
P
Ο
= 1W
25
–50
8.5
6
10
7
10
7
1
W
W
W
P
d
(*)
Dissipated Power at 1W Output
Power
Maximum Dissipated Power
P
DMAX
P
Ο
= 10W THD 10%
R
th-j-amb
= 38°C/W (Area 12cm
2
)
THD 10%
R
th-j-amb
= 38°C/W (Area 12cm
2
)
1.8
W
η
Efficiency
≡
P
O
P
O
+
P
D
≡
P
O
P
I
(**)
80
85
%
THD
I
max
Total Harmonic Distortion
Overcurrent Protection
Threshold
Thermal Shut-down Junction
Temperature
Closed Loop Gain
Total Input Noise
R
L
= 8
; P
O
= 0.5W
R
L
= 0
0.1
5
%
A
3.5
T
j
150
°C
G
V
e
N
29
30
7
12
30
60
50
0.4
120
31
dB
μ
V
μ
V
K
dB
ns
KHz
KHz
A Curve
f = 20Hz to 22KHz
R
i
Input Resistance
Supply Voltage Rejection
Rising and Falling Time
Power Transistor on Resistance
Switching Frequency
Switching Frequency Operative
Range
Zero Signal Frequency
Constant (***)
Frequency Controller Resistor
Range (****)
20
46
SVR
T
r
, T
f
R
DSON
F
SW
F
SW_OP
f = 100Hz; V
r
= 0.5
100
100
140
200
B
F
1.4x10
9
Hz
R
F
7
12
14
K
MUTE & STAND-BY FUNCTIONS
V
ST-BY
V
MUTE
V
PLAY
A
MUTE
I
qST-BY
Stand-by range
Mute Range
Play Range (1)
Mute Attenuation
Quiescent Current @ Stand-by
0.8
2.5
V
V
V
dB
mA
1.8
4
60
80
3
5
*: The output average power when the amplifier is playing music can be considered roughly 1/10 of the maximum output power. So it is useful
to consider the dissipated power in this condition for thermal dimensioning.
**: P
O
= measured across the load using the following inductor:
COIL 58120 MPPA2 (magnetics) TURNS: 28
1mm
COIL77120 KOOL M
μ
(magnetics) TURNS: 28
1mm
***: The zero-signal switching frequency can be obtained using the following expression: F
SW
= B
F
/R
F
****: The maximum value of R
F
is related to the maximum possible value for the voltage drop on R
F
itself.
(1): For V
12
>5.2V, an input impedance of 10K
is to be considered.
TDA7480
3/10
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