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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)： | 11/12頁 |
| 文件大?。?/td> | 178K |
| 代理商： | LA4302T |
LA4302T
No.7462-8/12
Pin Function Descriptions
Standby/Muting Function
Pin 17 functions as a three position switch that controls the standby and muting functions. The table below lists
the IC operating state as controlled by the voltage applied to pin 17. (See figure 4 for the equivalent circuit for the
pin 17 input circuit.)
When power is first applied to the LA4302T, its startup time function (a function that automatically mutes the
output for the time until an output is generated after power is first applied) operates. This means that no impulse
noises will be generated even if pin 17 is directly connected to pin 15 or 16 (VCC).
Voltage applied to pin 17
Operating state
8.8 to VCC
Amplifier operating state (muting is off)
2.5 to 7.5V
Amplifier operating state but with the outputs muted
0 to 1.5V
Standby state
Method for Clearing the Muted State (This section is provided for reference purposes.)
As described above, if a voltage in the range 2.5 to 7.5V is applied to pin 17, the amplifier will start, but will be in
the muted state and no output will be generated. The following method can be used by a 5V microcontroller or
other circuit to control the voltage applied to pin 17 to control the amplifier output by applications that desire to
clear the muted state from circuits that operate at a voltage in the 2.5 to 7.5V range : Connect pin 19 (an unused
pin) to pin 4 (the signal system ground).
This bypasses the mute circuit's operating current and clears the muted state. This does not release the starting time
function.
Figure 4 Internal Equivalent Circuit for Pins 17 and 19
Function of the BTL/SE Switching Pin
The LA4302T provides internal electronic switching between BTL and SE operation. The LA4302T operates in
BTL mode when pin 6 is either open or at a voltage less than 1/2VCC, and it operates in SE mode when pin 6 is
at a voltage greater than or equal to 1/2VCC. Figure 5 shows the equivalent circuit for the pin 6 internal circuit.
Figure 5 Pin 6 Internal Equivalent Circuit
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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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