TDA8566Q/N1 Просмотр технического описания (PDF) - Philips Electronics

Номер в каталоге

Компоненты Описание

производитель

TDA8566Q/N1

2 x 40 W/2Ωstereo BTL car radio power amplifier with differential inputs and diagnostic outputs

Philips Electronics 

Philips Semiconductors

2 x 40 W/2 Ω stereo BTL car radio power amplifier with

differential inputs and diagnostic outputs

Product specification

TDA8566Q

PINNING

SYMBOL PIN

DESCRIPTION

IN1+

1 channel 1 input positive

IN1−

SGND

2 channel 1 input negative

3 small signal ground

CLIP

4 clip detection

VP1

OUT1+

5 supply voltage 1

6 channel 1 speaker output positive

PGND1

7 channel 1 negative power supply

(ground)

OUT1−

8 channel 1 speaker output negative

n.c.

9 not connected

OUT2+

10 channel 2 speaker output positive

PGND2

11 channel 2 negative power supply

(ground)

OUT2−

VP2

MODE

12 channel 2 speaker output negative

13 supply voltage 2

14 mode select switch

(standby/mute/operating)

DIAG

15 short-circuit and temperature

pre-warning diagnostic

IN2+

16 channel 2 input positive

IN2−

17 channel 2 input negative

handbook, halfpage

IN1+ 1

IN1− 2

SGND 3

CLIP 4

VP1 5

OUT1+ 6

PGND1 7

OUT1− 8

n.c. 9 TDA8566Q

OUT2+ 10

PGND2 11

OUT2− 12

VP2 13

MODE 14

DIAG 15

IN2+ 16

IN2− 17

MGD101

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The TDA8566Q contains 2 identical amplifiers and can be

used for BTL applications. The gain of each amplifier is

fixed at 26 dB. Special features of this device are:

1. Mode select switch

2. Clip detection

3. Short-circuit diagnostic

4. Temperature pre-warning

5. Open-collector outputs

6. Differential inputs.

Mode select switch (pin 14)

• Standby: low supply current

• Mute: input signal suppressed

• Operating: normal on condition.

Since this pin has a very low input current (<40 µA), a low

cost supply switch can be applied. To avoid switch-on

plops, it is advisable to keep the amplifier in the mute mode

for a period of ≥150 ms (charging the input capacitors at

pins 1, 2, 16 and 17). This can be realized by

microcontroller control or by an external timing circuit (see

Fig.7).

Clip detection (pin 4)

When clipping occurs at one or more output stages, the

dynamic distortion detector becomes active and pin 4

goes LOW. This information can be used to drive a sound

processor or a DC volume control to attenuate the input

signal and so limit the level of distortion. The output level

of pin 4 is independent of the number of channels that are

being clipped. The clip detection circuit is disabled in a

short-circuit condition, so if a fault condition occurs at the

outputs, pin 4 will remain at a HIGH level. The clip

detection waveforms are illustrated in Fig.3.

2001 Feb 21

4

Share Link: