TDA8944J Просмотр технического описания (PDF) - NXP Semiconductors.

Номер в каталоге

Компоненты Описание

производитель

TDA8944J

2 x 7 W stereo Bridge Tied Load (BTL) audio amplifier

NXP Semiconductors. 

NXP Semiconductors

14. Application information

TDA8944J

2 x 7 W stereo BTL audio amplifier

Rs

220 nF

Symmetrical

input

Ci

220 nF

Rs

220 nF

Asymmetrical

input

Ci

signal

GND

220 nF

IN1− 8

1.5

nF

6

IN1+

IN2− 9

1.5

nF

VCC

R

12

IN2+

MODE 10

C1

MICROCONTROLLER

C2

MODE

Standby

Mute

On

C1 C2

00

01

10

R

signal

GND

SVR 11

10

μF

3

16

Ri

45 kΩ

1/2 VCC

Ri

45 kΩ

−

−+

+

−

+

1/2 VCC

+

−

TDA8944J

100 nF

+VCC

1000 μF

1 OUT1−

RL

8Ω

4 OUT1+

Ri

45 kΩ

1/2 VCC

Ri

45 kΩ

−

−+

+

−

+

1/2 VCC

+

−

VCC

STANDBY/

MUTE LOGIC

14 OUT2−

RL

8Ω

17 OUT2+

20 kΩ

1/2 VCC

20 kΩ

SHORT CIRCUIT

AND

TEMPERATURE

PROTECTION

2

15

GND

MGL950

Fig 14. Application diagram.

14.1 Printed-circuit board (PCB)

14.1.1 Layout and grounding

For a high system performance level certain grounding techniques are essential.

The input reference grounds have to be tied with their respective source grounds and

must have separate tracks from the power ground tracks; this will prevent the large

(output) signal currents from interfering with the small AC input signals.

The small-signal ground tracks should be physically located as far as possible from

the power ground tracks. Supply and output tracks should be as wide as possible for

delivering maximum output power.

9397 750 06861

Product specification

Rev. 02 — 14 February 2000

© NXP B.V. 2010. All rights reserved.

13 of 22

Share Link: