TDA7491P Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

TDA7491P

2 x 10-watt dual BTL class-D audio amplifier

STMicroelectronics 

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 VCC = 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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