TDA7374BV STMicroelectronics, TDA7374BV Datasheet - Page 14

• Manufacturer Part Number: TDA7374BV
• Description: IC AMP AUDIO PWR 21W MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TDA7374BV

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 21W x 2 @ 4 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: Depop, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Output stage
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
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Open ground
When the radio is in the ON condition and the ground is accidentally opened, a standard
audio amplifier will be damaged. On the TDA7374 protection diodes are included to avoid
any damage.
Inductive load
A protection diode is provided to allow use of the TDA7374 with inductive loads.
DC voltage
The maximum operating DC voltage for the TDA7374 is 18 V. However the device can
withstand a DC voltage up to 28 V with no damage. This could occur during winter if two
batteries are series connected to crank the engine.
Thermal shut-down
The presence of a thermal limiting circuit offers the following advantages:
1.
2.
The maximum allowable power dissipation depends upon the size of the external heatsink
(i.e. its thermal resistance);
temperature for different thermal resistance.
Figure 21. Maximum allowable power dissipation vs. ambient temperature
Loudspeaker protection
The TDA7374 guarantees safe operations even for the loudspeaker in case of accidental
shortcircuit.
Whenever a single OUT to GND, OUT to V
switched OFF so limiting dangerous DC current flowing through the loudspeaker.
an overload on the output (even if it is permanent), or an excessive ambient
temperature can be easily withstood.
the heatsink can have a smaller factor of safety compared with that of a conventional
circuit. There is no device damage in case of excessive junction temperature: all
happens is that P
o
(and therefore Ptot) and Id are reduced.
Figure 21
shows the dissipable power as a function of ambient
S
short circuit occurs both the outputs are
TDA7374