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参数资料
| 型号： | LA4800V |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.025 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封装： | SSOP-16 |
| 文件页数： | 6/6页 |
| 文件大小： | 377K |
| 代理商： | LA4800V |
External Components Description
Components
Recommended value
Description
C1, C2
1 to 4.7 μF
Input coupling capacitors
C3, C4
3.3 to 10 μF
Reference bias (VREF) decoupling capacitors
C5, C4
4.7 to 10 μF
Ripple filter capacitors. Increasing the capacitance also increases the distortion and
the supply rise time at turn ON.
C6
0.1 to 1 μF
Input coupling capacitor for the beep tone. Choose a value that does not attenuate the
beep tone signal.
C8
220 μF
Supply line coupling capacitor
C9, C10, C11
0.22 to 0.47 μF
Oscillation damping capacitors. Film capacitors are recommended.
C12
0.1 to 1.0μF
Mute time setting capacitor. See the description in the Operating Notes.
R1, R2
Beep tone input signal adjustment resistors. Follow the manufactures instructions.
R3, R4, R5
0.5 to 4.3
Ω
Power amplifier oscillation damping resistors.
R6
100 k
Ω
Mute OFF pin 16 bias setting resistor. The internal 300 k
Ω resistor and this 100 kΩ
resistor together set the mute switch (pin 16) threshold.
Operating Notes
Beep tone operating principle
The design of the above when mute is ON (pin 16 open) is as follows:
The output voltage VO as function of RL is
VO =
RL
RL+ 3k+ 1k
× VA
Forexample,ifRL =16 Ω and VA = 0.5 V (VA is the adjusted input voltage on pin 9),
VO =
16
Ω
16
Ω + 3k+ 1k
× 0.5 2mV
The beep tone output voltage VO 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 VO. 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:
Ω, capacitance: F)
LA4800V
No.4335-6/11
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相关代理商/技术参数 |
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| LA4801 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
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| LA4802 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
| LA4802T | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Headphone Stereo Power Amplifier |
| LA4805 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:3V Stereo Headphone Power Amplifier |
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