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參數(shù)資料
| 型號： | STA7360 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 20W BRIDGE/STEREO AUDIO AMPLIFIER WITH CLIPPING DETECTOR |
| 中文描述： | 20瓦橋/立體聲音頻放大器，具有裁剪探測器 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 481K |
| 代理商： | STA7360 |
STA7360
14/18
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 connected
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.
DC Voltage
The maximum operating DC voltage for the STA7360
is 18V.
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 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 depends
upon the size of the external heatsink (i.e. its thermal
resistance); Fig. 32 shows the dissipable power as a
function of ambient temperature for different thermal
resistance.
Figure 32. Maximum Allowable Power
Dissipation vs. Ambient Temperature
Loudspeaker Protection
The STA7360 guarantees safe operations even for
the loudspeaker in case of accidental shortcir-
cuit.Whenever a single OUT to GND, OUT to V
S
short circuit occurs both the outputs are switched
OFF so limiting dangerous DC current flowing
through the loudspeaker.
Figure 33. Restart Circuit
APPLICATION HINTS
This section explains briefly how to get the best from
the STA7360 and presents some application circuits
with suggestions for the value of the components.
These values can change depending on the charac-
teristics that the designer of the car radio wants to ob-
tain,or other parts of the car radio that are connected
to the audio block.
To optimize the performance of the audio part it is
useful (or indispensable) to analyze also the parts
outside this block that can have an interconnection
with the amplifier.
This method can provide components and system
cost saving.
Reducing Turn On-Off Pop
The STA7360 has been designed in a way that the
turn on(off) transients are controlled through the
charge(discharge) of the Csvr capacitor.
As a result of it, the turn on(off) transient spectrum
contents is limited only to the subsonic range. The
following section gives some brief notes to get the
best from this design feature(it will refer mainly to the
stereo application which appears to be in most cases
the more critical from the pop viewpoint. The bridge
connection in fact,due to the common mode wave-
form at the outputs, does not give pop effect).
TURN-ON
Fig 34 shows the output waveform (before and after
the "A" weighting filter) compared to the value of Cs-
vr.
Better pop-on performance is obtained with higher
Csvr values (the recommended range is from 22uF to
220uF).
The turn-on delay (during which the amplifier is in
mute condition) is a function essentially of : Cout ,
Csvr .
Being:
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相關(guān)代理商/技術(shù)參數(shù) |
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| STA7360_11 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:20 W bridge/stereo audio amplifier with clipping detector |
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| STA802M | 制造商:SANKEN 制造商全稱:Sanken electric 功能描述:2-Output Separate Excitation Switching Type |
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