Characterization curves

TDA7492P

10/26

Doc ID 15068 Rev 5

4

Characterization curves

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

Figure 4.

THD at 1 kHz vs. output power

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

89

10

11

12

13

14

15

16

17

18

Test conditions:

Vcc = 8 to 18 V,

RL = 6

Ω,

Rosc= 39 k

Ω,Cosc = 100 nF,

f = 1 kHz,

Gv = 30 dB,

Tamb = 25

r C

Specification limit:

Typical:

Vcc =18 V, RL = 6

Ω

Po = 25 W @THD = 10%

Po = 20 W @THD = 1%

THD = 1%

THD = 10%

Supply voltage (V)

THD (%)

0.005

10

0.01

0.02

0.05

0.1

0.2

0.5

1

2

5

200m

30

500m

1

2

5

10

20

Test conditions:

Vcc = 18 V,

RL = 6

Ω,

Rosc= 39 k

Ω,Cosc = 100 nF,

f = 1 kHz,

Gv = 30 dB,

Tamb = 25

r C

Specification limit:

Typical:

Po = 25 W @THD = 10%

Output power (W)