TDA1904 Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

TDA1904

4W AUDIO AMPLIFIER

STMicroelectronics 

TDA1904

THERMAL SHUT-DOWN

The presence of a thermal limiting circuit offers the

following advantages:

1) An overload on the output (even if it is perma-

nent), or an above limit ambient temperature

can be easily tolerated since the Tj cannot be

higher than 150°C.

2) The heatsink can have a smallerfactor of safety

compared with that of a conventional circuit.

There is no possibility of device damage due to

high junction temperature.

If for any reason, the junction temperature in-

crease up to 150°C, the thermal shut-down

simply reduces the power dissipation and the

current consumption.

MOUNTING INSTRUCTION

The TDA 1904 is assembled in the Powerdip, in

which 8 pins (from 9 to 16)are attachedto the frame

and remove the heat produced by the chip.

Figure 21 shows a PC board copper area used as

a heatsink (I = 65 mm).

The thermal resistance junction-ambient is 35°C.

Figure 21. Example of heatsink using PC board

copper (l = 65 mm)

8/10

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