參數(shù)資料
型號: TDA7350A
廠商: STMICROELECTRONICS
元件分類: 音頻/視頻放大
英文描述: 11 W, 2 CHANNEL, AUDIO AMPLIFIER, PZFM11
文件頁數(shù): 7/23頁
文件大?。?/td> 494K
代理商: TDA7350A
15/23
TDA7350A
Figure 39.
4.9.3 Polarity Inversion
High current (up to 10A) can be handled by the de-
vice with no damage for a longer period than the
blow-out time of a quick 2A fuse (normally con-
nected in series with the supply). This features is
added to avoid destruction, if during fitting to the
car, a mistake on the connection of the supply is
made.
4.10 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 TDA7350A pro-
tection diodes are included to avoid any damage.
4.10.1DC Voltage
The maximum operating DC voltage for the
TDA7350A is 18V. However the device can with-
stand a DC voltage up to 28V with no damage.
This could occur during winter if two batteries are
series connected to crank the engine.
4.10.2Thermal 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 excessive ambient temperature can
be easily withstood.
2) the heatsink can have a smaller factor of safety
compared with that of a conventional circuit.
There is no device damage in the case of exces-
sive junction temperature: all happens is that Po
(and therefore Ptot) and Id are reduced.
The maximum allowable power dissipation de-
pends upon the size of the external heatsink (i.e.
its thermal resistance); Fig. 40 shows the dissi-
pable power as a function of ambient temperature
for different thermal resistance.
Figure 40. Maximum Allowable Power
Dissipation vs. Ambient Temperature
The TDA7350A guarantees safe operations even
for the loudspeaker in case of accidental shortcir-
cuit.
Whenever a single OUT to GND, OUT to VS short
circuit occurs both the outputs are switched OFF
so limiting dangerous DC current flowing through
the loudspeaker.
Figure 41. Restart Circuit
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
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