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參數(shù)資料
| 型號(hào)： | LA4800 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | 3 V Stereo Headphone Power Amplifier |
| 中文描述： | 3伏立體聲耳機(jī)功率放大器 |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 192K |
| 代理商： | LA4800 |
External Components Description
Components
C1, C2
C3, C4
Recommended value
1 to 4.7 μF
3.3 to 10 μF
Description
Input coupling capacitors
Reference bias (V
REF
) decoupling capacitors
Ripple filter capacitors. Increasing the capacitance also increases the distortion and
the supply rise time at turn ON.
Input coupling capacitor for the beep tone. Choose a value that does not attenuate the
beep tone signal.
Supply line coupling capacitor
Oscillation damping capacitors. Film capacitors are recommended.
Mute time setting capacitor. See the description in the Operating Notes.
Beep tone input signal adjustment resistors. Follow the manufactures instructions.
Power amplifier oscillation damping resistors.
Mute OFF pin 16 bias setting resistor. The internal 300 k
resistor and this 100 k
resistor together set the mute switch (pin 16) threshold.
C5, C4
4.7 to 10 μF
C6
0.1 to 1 μF
C8
220 μF
C9, C10, C11
C12
R1, R2
R3, R4, R5
0.22 to 0.47 μF
0.1 to 1.0μF
0.5 to 4.3
R6
100 k
Operating Notes
Beep tone operating principle
The design of the above when mute is ON (pin 16 open) is as follows:
The output voltage V
O
as function of R
L
is
R
L
V
O
=
R
L
+ 3k+ 1k
×
V
A
For example, if R
L
= 16
and V
A
= 0.5 V (V
A
is the adjusted input voltage on pin 9),
16
×
0.5
2 mV
V
O
=
16
+ 3k+ 1k
The beep tone output voltage V
O
is determined by the above equation. However, the oscillation damping RC components are
connected to the PWR output and hence these RC components will also influence the actual value of V
O
. When using the beep
tone, the impedance of C10, connected to the common output (pin 13), must be greater than the impedance of C9 and C11, i.e.
C10 must be greater than C9 and C11.
Signal from microcontroller
Unit (resistance:
, capacitance: F)
LA4800V
No.4335-6/11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA4800V | 3 V Stereo Headphone Power Amplifier |
| LA4801 | Headphone Stereo Power Amplifier |
| LA4801V | Headphone Stereo Power Amplifier |
| LA4802 | Headphone Stereo Power Amplifier |
| LA4802T | Headphone Stereo Power Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA4800V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:3 V Stereo Headphone Power Amplifier |
| LA4801 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
| LA4801V | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
| LA4802 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
| LA4802T | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
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