TDA7492P13TR Datasheet, PDF (10/26 Pages) STMicroelectronics – 25-watt + 25-watt dual BTL class-D audio amplifier

Characterization curves
4
Characterization curves
TDA7492P
The following characterizations were made using the SZ-LAB-TDA7492P demo board. The
layout is shown in Figure 19 on page 16. The LC filter for the 6 Ω load used 22 µH and
220 nF components, whilst that for the 8 Ω load used 33 µH and 220 nF.
4.1
Characterizations for 6 Ω loads with 18 V
Figure 3. Output power vs. supply voltage
Test conditions:
Vcc = 8 to 18 V,
RL = 6 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
Gv = 30 dB,
Tamb = 25r C
Specification limit:
Typical:
Vcc =18 V, RL = 6 Ω
Po = 25 W @THD = 10%
Po = 20 W @THD = 1%
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
8
THD = 10%
THD = 1%
9
10
11
12
13
14
15
16
17
18
Supply voltage (V)
Figure 4. THD at 1 kHz vs. output power
Test conditions:
Vcc = 18 V,
RL = 6 Ω,
Rosc = 39 kΩ, Cosc = 100 nF,
f = 1 kHz,
Gv = 30 dB,
Tamb = 25r C
Specification limit:
Typical:
Po = 25 W @THD = 10%
10
5
THD (%)
2
1
0.5
0.2
0.1
0.05
0.02
0.01
0.005
200m
500m
1
2
5
Output power (W)
10
20 30
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Doc ID 15068 Rev 5