TDA7490LSA 查看數據表（PDF） - STMicroelectronics
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TDA7490LSA Datasheet PDF : 13 Pages
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2 Electrical characteristcs
TDA7490LSA
Table 3.
Symbol
electrical characteristcs (Refer to the test circuit, VCC = ±14.5V; RL = 6Ω;
Demod. filter L = 33 µH, C = 220nF; f = 1KHz; R1 = 27kΩ; Tamb = 25°C unless otherwise
specified.)
Parameter
Test Condition
Min. Typ. Max. Unit
FSW Switching Frequency
FSWR
Output Switching Frequency
Range
Internal Oscillator
with Internal Oscillator (2)
with external Oscillator (3)
180 200 220 KHz
140
250 KHz
100
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
1
0.1
Vs=+/- 13.5V
Rl =8ohm
F = 1KHz
0.01
100m 200m 500m 1 2
Pout(W)
5 10
Figure 4. output power vs supply voltage
(single)
16
Pout (W)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
+14
Rload=8 ohm
f = 1KHz
+16
+18
+20
+22
Vsupply (V)
THD= 10%
THD= 1%
+24
+26
+28 +30
6/13
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