TDA1905 STMicroelectronics, TDA1905 Datasheet - Page 12

• Manufacturer Part Number: TDA1905
• Description: IC AMP AUDIO 5.5W MONO AB 16DIP
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA1905

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 5.5W x 1 @ 8 Ohm
• Voltage - Supply: 4 V ~ 30 V
• Features: Depop, Mute, Thermal Protection
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Amplifier Class: AB
• No. Of Channels: 1
• Output Power: 5W
• Supply Voltage Range: 4V To 30V
• Thd + N: 0.1% @ 1.5W, 4ohm, VS=9V
• Load Impedance: 4ohm
• Operating Temperature Range: -40°C To +150°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2160-5

THERMAL SHUT-DOWN
The presence of a thermal limiting circuit offers the following advantages:
1) An overload on the output (even if it is permanent), or an above limit ambient temperature can be easily
2) The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is
The maximum allowable power dissipation depends upon the size of the external heatsink (i.e. its thermal
resistance); fig. 32 shows this dissipable power as a function of ambient temperature for different thermal
resistance.
MOUNTING INSTRUCTION : See TDA1904
TDA1905
12/14
tolerated since the Tj cannot be higher than 150 C.
no possibility of device damage due to high junction temperature.
If for any reason, the junction temperature increases up to 150 C, the thermal shut-down simply reduces
the power dissipation and the current consumption.
Figure 30. Output power
and drain current vs. case
temperature
Figure 31. Output power
and drain current vs. case
temperature
Figure 32. Maximum allo-
wable power dissipation
vs. ambient temperature