TDA1904 STMicroelectronics, TDA1904 Datasheet - Page 8

• Manufacturer Part Number: TDA1904
• Description: IC AMP AUDIO PWR 4.5W MONO 16DIP
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA1904

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 4.5W x 1 @ 4 Ohm
• Voltage - Supply: 4 V ~ 20 V
• Features: Thermal Shutdown Protection
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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-
2) The heatsink can have a smaller factor of safety
8/10
nent), or an above limit ambient temperature
can be easily tolerated since the T
higher than 150 C.
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.
j
cannot be
Figure 21. Example of heatsink using PC board
copper (l = 65 mm)
MOUNTING INSTRUCTION
The TDA 1904 is assembled in the Powerdip, in
which 8 pins (from 9 to 16) are attached to 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.