TDA7481 データシートの表示（PDF） - STMicroelectronics
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TDA7481 Datasheet PDF : 6 Pages
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TDA7481
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VCC = ±18V; RL = 8Ω; RS = 50Ω;
RF = 12KΩ; Demod.. filter L = 60µH, C = 470nF; f = 1KHz; Tamb = 25°‘C unless otherwise specified.)
Symbol
VS
Iq
VOS
PO
PO
PD
η
Parameter
Supply Range
Total Quiescent Current
Output Offset Voltage
Output Power
Output Power
Maximum Dissipated Power
Efficiency
≡
PO
PO + PD
≡
PO
PI
(**)
Test Condition
RL = ∞, no LC filter
PLAY condition
THD = 10%
THD = 1%
VCC = ±15V; RL = 4Ω
THD = 10%
THD = 1% (*)
VCC = ±18V; RL = 8Ω; Rf = 12KΩ
PΟ = 18W THD 10%
VCC = ±18V; RL = 8Ω; Rf = 12KΩ
PΟ = 18W THD 10%
Min.
±10
–70
15
10
Typ.
35
-30
18
13
18
13
3.5
85
Max.
±25
55
10
Unit
V
mA
mV
W
W
W
W
W
%
THD
Imax
t(s) Tj
uc GV
d eN
Pro VCCTOT MAX
te Ri
le SVR
o Tr, Tf
s RDSON
b FSW-OP
- O FSW
t(s) BF
c RF
rodu VST-BY
P VMUTE
te VPLAY
le AMUTE
o IqST-BY
Total Harmonic Distortion
RL = 8Ω; PO = 1W
Overcurrent Protection
Threshold
RL = 0
Thermal Shut-down Junction
Temperature
Closed Loop Gain
Total Input Noise
A Curve
f = 20Hz to 22KHz
Maximum Total VCC Protection
Input Resistance
Supply Voltage Rejection
f = 100Hz; Vr = 0.5
Rising and Falling Time
Power Transistor on Resistance
Switching Frequency Operative
Range
Switching Frequency
Zero Signal Frequency
Constant (***)
Frequency Controller Resistor
Range (****)
MUTE & STAND-BY FUNCTIONS
Stand-by range
Mute Range
Play Range (1)
Mute Attenuation
Quiescent Current @ Stand-by
bs *: The output LC filter must be changed to: L = 30µH; C = 1µF
O**: PO = measured across the load using the following inductor:
0.1
3.5
5
150
29
30
31
7
12
50
20
30
46
60
50
0.4
100
200
100 120 140
1.4x109
7
12
14
%
A
°C
dB
µV
µV
V
kΩ
dB
ns
Ω
KHz
KHz
HzΩ
KΩ
0.8
V
1.8
2.5
V
4
V
60
80
dB
3
5
mA
COIL 58120 MPPA2 (magnetics) TURNS: 28 ∅ 1mm
***: The zero-signal switching frequency can be obtained using the following expression: FSW = BF/RF
****: The maximum value of RF is related to the maximum possible value for the voltage drop on RF itself
(1) for V10 >5.2V, an input impedance of 10KΩ is to be considered
3/6
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