TDA1564 데이터 시트보기 (PDF) - Philips Electronics

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TDA1564

High efficiency 2×25 W/4Ω stereo car radio power amplifier

Philips Electronics 

Philips Semiconductors

High efficiency 2 × 25 W/4 Ω

stereo car radio power amplifier

Preliminary specification

TDA1564

VP1 20

CIN 19

IN1− 18

IN1+ 17

CSE 16

DIAG 15

IN2+ 14

IN2− 13

OC1 12

VP2 11

TDA1564TH

1 n.c.

2 MODE

3 OUT1−

4 OUT1+

5 GND1

6 GND2

7 OUT2−

8 OUT2+

9 OC2

10 n.c.

001aaa307

Fig.3 Pin configuration (TDA1564TH).

handbook, halfpage

IN1+ 1

IN1− 2

CIN 3

CSE 4

VP1 5

MODE 6

OUT1− 7

OUT1+ 8

GND 9 TDA1564J

OUT2− 10

OUT2+ 11

OC2 12

VP2 13

OC1 14

DIAG 15

IN2− 16

IN2+ 17

MGW245

Fig.4 Pin configuration (TDA1564J).

FUNCTIONAL DESCRIPTION

The TDA1564 contains two identical amplifiers with

differential inputs. At low output power [up to output

amplitudes of 3 V (RMS) at VP = 14.4 V], the device

operates as a normal SE amplifier. When a larger output

voltage swing is needed, the circuit switches internally to

BTL operation.

With a sine wave input signal, the dissipation of a

conventional BTL amplifier (up to 2 W output power) is

more than twice the dissipation of the TDA1564 (see

Fig.12).

In normal use, when the amplifier is driven with music-like

signals, the high (BTL) output power is only needed for a

small percentage of time. Assuming that a music signal

has a normal (Gaussian) amplitude distribution, the

dissipation of a conventional BTL amplifier with the same

output power is approximately 70 % higher (see Figs 13

and 14.

The heatsink has to be designed for use with music

signals. With such a heatsink, the thermal protection will

disable the BTL mode when the junction temperature

exceeds 150 °C. In this case, the output power is limited to

5 W per amplifier.

The gain of each amplifier is internally fixed at 26 dB. The

device can be switched to the following modes via the

MODE pin:

• Standby with low standby current (< 50 µA)

• Mute condition, DC adjusted

• On, operation.

The device is fully protected against a short-circuit of the

output pins to ground and to the supply voltage. It is also

protected against a short-circuit of the loudspeaker and

against high junction temperatures. In the event of a

permanent short-circuit condition to ground or the supply

voltage, the output stage will be switched off, causing low

dissipation. With a permanent short-circuit of the

2004 Jan 27

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