TDA7491P Datasheet, PDF (13/42 Pages) STMicroelectronics – 2 x 10-watt dual BTL class-D audio amplifier

TDA7491P
4
Characterization curves
Characterization curves
The following characterization curves were made using the TDA7491P demo board. The
LC filter for the 4-Ω load uses components of 15 µH and 470 nF, whilst that for the 6-Ω load
uses 22 µH and 220 nF and that for the 8-Ω load uses 33 µH and 220 nF.
4.1
With 4-Ω load at V_CC = 10 V
Figure 3. Output power vs. supply voltage
Test Condition :
Vcc = 5~10V,
RL = 4 ohm,
Rosc = 39kΩ,
Cosc =100nF,
f =1kHz,
Gv = 30dB,
Tamb = 25℃
Specification Limit:
Typical:
Po = 10W @THD =10%
Po =8W @THD =1%
Output Power (W)
12
11
10
9
8
7
6
5
4
3
2
1
0
5
6
7
8
Supply Voltage (V)
Figure 4. THD vs. output power (1 kHz)
THD (%)
Test Conditions:
Vcc = 10V
Rl = 4 ohm
Rosc = 39k ohm
Cosc = 100nF
f = 1kHz
Gv = 20 dB
Tamb. = 25 ˚C
9
10
Specification limits:
Typical:
Po = 12W, THD = 10%
Output Power (W)
Doc ID 13540 Rev 6
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