TDA7490SA 查看數據表（PDF） - STMicroelectronics
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TDA7490SA Datasheet PDF : 13 Pages
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2 Electrical characteristcs
TDA7490SA
Table 3.
electrical characteristcs (Refer to the test circuit, VCC = ±13.5V; RL = 8Ω;
Demod. filter L = 33 µH, C = 220nF; f = 1KHz; R1 = 27kΩ; Tamb = 25°C unless otherwise
specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
FSWR
Output Switching Frequency
Range
with Internal Oscillator (2)
with external Oscillator (3)
140
100
250 KHz
250 KHz
MUTE & STAND-BY FUNCTIONS
VST-BY Stand-by range
VMUTE Mute Range
VPLAY Play Range
AMUTE Mute Attenuation
IqST-BY Quiescent Current @ Stand-by
0
0.7
V
1.7
2.5
V
4
5
V
60
dB
1.5
2
mA
Note: 1 : PO = measured across the load using the following inductor: SUMIDA RCH-108-330K
2 : Fsw = 4----8---1---0-- + 23 with R1 in KΩ; Fsw in KHz R1
R1
3
:
Fsw =
Fsw
=
⎛
⎝
14--⎠⎞
⋅ Fest with Fext, the frequency
of the
external oscillator
Figure 3. distortion vs output power
THD(%)
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
100m
Vs = 27V
Rl =8ohm
F = 1KHz
200m
500m
1
2
Pout(W)
5
10
Figure 4. output Power vs Supply Voltage
(single)
Po(W)
14
12
10
Rl =8ohm
f = 1KHz
8
THD=10%
6
4
THD=1%
2
0
20
+14 +16 +18 +20 +22 +24 +26 +28 +30
Vs (V)
6/13
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