- 您现在的位置：买卖IC网 > PDF目录30719 > LA4820M 0.12 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 PDF资料下载
参数资料
| 型号： | LA4820M |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.12 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| 封装： | MFP-24 |
| 文件页数： | 6/21页 |
| 文件大小： | 637K |
| 代理商： | LA4820M |
c An equivalent circuit for the mute circuit is shown on the previous page. If the power supply is turned on, the external capacitor
is charged by the internal constant current; once the voltage reaches 0.75 V (the switching level), mute turns off and the pin 2
DC voltage stabilizes at approximately 1.2 V. To turn mute on, short through a resistor to pull down pin 2. In this way,
smoothing is applied by using an external capacitor and resistor to prevent switching noise when mute is turned on/off.
c The mute-on/off time during normal operation is as shown below.
2. Common amplifier control switch
c When the headphone output is connected to other equipment, in an application set in which the common amplifier output (jack
common pin) may be connected to GND causing overcurrent to flow from the common amplifier, it is necessary to turn off the
common amplifier. In such an application, it is recommended to use the common capacitor scheme shown in Sample Application
Circuit 2 where pin 11 is grounded to turn off the common amplifier.
c An equivalent circuit for the switching circuit is shown below.
c PWRC-off condition
VS11 % 0.4 V
3. HzP/SP switch
c This circuit uses a headphone jack with a switch to detect the headphone plug-in/out and automatically switch between the HzP
amplifier and the MONO amplifier. When the HzP amplifier is operating, the MONO amplifier is turned off, and when the
MONO amplifier is operating, the HzP amplifier is turned off.
c Smoothing is applied by using an external capacitor and resistor in order to prevent switching shock noise.
c Open HzP condition
VS14 % 0.2 V
Mute-off time
6 8ms
Mute on
Pin 2 discharging
Mute-on time
6 9ms
When 270 k
and 0.033 F are used:
Mute off
Pin 2 charging
to
LA4820M
No.5205-14/21
相关PDF资料 |
PDF描述 |
|---|---|
| LA4901 | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, DIP28 |
| LA4902 | 10 W, 1 CHANNEL, AUDIO AMPLIFIER, DIP28 |
| LA49032H | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| LA4905 | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM23 |
| LA4906 | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM23 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LA4905 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:17-W, 2-Channel BTL AF High-Efficiency Power Amplifier for Car Stereo Systems |
| LA4906 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:17-W, 2-Channel BTL AF High-Efficiency Power Amplifier for Car Audio Systems |
| LA4917H | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monolithic Linear IC Audio Output for TV application High-Effciency Two-Channel 7W BTL Power Amplifier ICs |
| LA4919N | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Monolithic Linear IC Two-Channel 10W BTL High-Efficiency TV Audio Output Power Amplifier |
| LA4B-M1C2LV-G | 制造商:IDEC CORPORATION 功能描述:Switch Push Button N.O./N.C. DPDT Flush Rectangular Button 0.1A 250VAC 250VDC Momentary Contact PC Pins Panel Mount/Through Hole |
发布紧急采购，3分钟左右您将得到回复。