TDA7490SA Datasheet, PDF (6/13 Pages) STMicroelectronics – 10W +10W Stereo Class-D Amplifier

2 Electrical characteristcs
TDA7490SA
Table 3.
electrical characteristcs (Refer to the test circuit, V_CC = ±13.5V; R_L = 8Ω;
Demod. filter L = 33 µH, C = 220nF; f = 1KHz; R1 = 27kΩ; T_amb = 25°C unless otherwise
specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
F_SWR
Output Switching Frequency
Range
with Internal Oscillator ⁽²⁾
with external Oscillator ⁽³⁾
140
100
250 KHz
250 KHz
MUTE & STAND-BY FUNCTIONS
V_ST-BY Stand-by range
V_MUTE Mute Range
V_PLAY Play Range
A_MUTE Mute Attenuation
I_qST-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 : P_O = 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 =
F_sw
=
⎛
⎝
14_{--⎠⎞}
⋅ F_est with F_ext, 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)
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