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參數(shù)資料
| 型號： | LA4302T |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 4 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| 封裝： | 0.225 INCH, TSSOP-20 |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 178K |
| 代理商： | LA4302T |
LA4302T
No.7462-9/12
Pin 19 Function (Chip temperature Tj check)
The LA4302T allows applications to verify the chip temperature (Tj) during IC operation by measuring the pin
19 DC voltage.
Temperature conversion : The figure below shows the temperature characteristics of the pin 19 internal circuit,
which can be used for temperature measurement.
Pin 19 Voltage -- Chip Temperature (Tj)
1.5
2.0
2.5
3.0
3.5
4.0
4.5
--50
0
50
100
150
200
Pin
19
v
oltage
-
V
Chip temperature, Tj --
°C
Usage Notes
Maximum Ratings
If the IC is operated in the vicinity of the maximum rating limits, even slight changes in operating conditions can
result in the maximum ratings being exceeded. Since this can lead to permanent damage to the IC itself,
applications should provide adequate margins in the power supply voltages and other parameters and assure that
the IC is operated in ranges that never exceed the maximum ratings.
Notes on IC Heat Dissipation
The LA4302T features an ultraminiature surface mounting package (TSSOP20J) that includes heat dissipating
pads. Since this device is designed for heat dissipation by surface mounting on a 4-layer circuit board, adequate
thermal dissipation must be provided for the actual usage conditions.
Through holes should be provided in the section of the circuit board where the IC package heat dissipating pads
are mounted, and adequate thermal dissipation must be provided by connecting the pads to the copper foil layer
that can be used. See paragraph Pin 19 Function (Chip temperature Tj check) above, for more information on
determining whether or not the thermal dissipation provided is adequate for the usage conditions.
Protection Circuits
While the LA4302T includes a full complement of built-in protection circuits, care is still required when using
this device. In particular, do not short any IC pins to each other.
The LA4302T includes a thermal protection circuit to prevent damage to or destruction of the IC should abnormal
internal heat generation occur. This means that should the IC junction temperature (Tj) rise above about 160
°C
due to inadequate heat dissipation or other reason, the thermal protection circuit will operate to gradually reduce
the output level, and finally stop IC operation should the temperature rise further. If the temperature is reduced
by lowering the input level or other means, the thermal protection circuit will recover automatically.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LA-4306 | 制造商:Ideal Industries Inc 功能描述: |
| LA-4308 | 制造商:Ideal Industries Inc 功能描述: |
| LA-4311 | 制造商:Ideal Industries Inc 功能描述: |
| LA4341R11 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| LA43G-G | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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