TDA7491LP Datasheet, PDF (12/37 Pages) STMicroelectronics – 2 x 5-watt dual BTL class-D audio amplifier

Characterization curves
4
Characterization curves
TDA7491LP
The following characterization curves were made using the TDA7491LP demo board. The
LC filter for the 4-Ω load uses components of 15 µH and 470 nF and that for the 8-Ω load
uses 33 µH and 220 nF.
4.1
With 4-Ω load at V_CC = 6.6 V
Figure 3. Output power vs. supply voltage
Test Condition :
Vcc = 5~6.6V
RL = 4 ohm,
Rosc =39kΩ, Cosc =100nF,
f =1kHz,
Gv =30dB,
Tamb =25°C
Specification Limit:
Typical:
Vs =6.6V, Rl = 4 ohm
Po =5W @THD =10%
Po =3.7W @THD =1%
6
5
4
3
2
1
0
5
5. 4
5. 8
6. 2
Supply voltage (V)
THD =10%
THD =1%
6. 6
Figure 4. THD vs. output power (1 kHz)
THD(%)
Test Condition:
Vcc =6.6V,
RL= 4 ohm,
Rosc =39kΩ, Cosc =100nF,
f =1kHz,
Gv =30dB,
Tamb =25°C
Specification Limit:
Typical:
Po =5W @ THD =10%
12/37
Po per Channel (W)
Doc ID 13541 Rev 5