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参数资料
| 型号： | LA4906 |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 25 W, 2 CHANNEL, AUDIO AMPLIFIER, ZFM23 |
| 封装： | SIP-23 |
| 文件页数： | 6/10页 |
| 文件大小： | 604K |
| 代理商： | LA4906 |
No. 5714-5/10
LA4906
Sample Printed Circuit Board
1. External component descriptions
C1 and C2
Input capacitors. A value of 2.2 μF is recommended for these capacitors. Note that the low-frequency area
characteristics can be adjusted by changing fL, which is determined by the values of C1 and C2. However, due to
impulse (pop) noise considerations, the value of C1 and C2 should not exceed 3.3 μF when C4 is 22 μF.
C3
Beep amplifier input capacitor. A value the same as that of C1 and C2 is used. If the beep function is not used, connect
the beep input to PRE-GND through C3.
C4
Set the amplifier turn-on time. A value of 22 μF is recommended. (This will result in a turn-on time of about 0.7
second.) The on time is proportional to the value of this capacitor, and any value may be used. However, due to
impulse (pop) noise considerations, a value of 22 μF or larger should be used.
C5, C6, C7, and C8
Oscillation prevention capacitors. Polyester film (Mylar) capacitors with good temperature characteristics must be used.
(These are used together with R1, R2, R3, and R4.) We recommend values of 0.1 μF or higher for these capacitors
since the stability will differ somewhat depending on the printed circuit board layout actually used.
C9
Decoupling capacitor (ripple filter)
C10
Power-supply capacitor
C11
Oscillation prevention capacitor for the switching regulator. A value of 1500 pF is recommended.
C12
Switching regulator output smoothing capacitor. The LA4906 adopts a self-excited switching regulator technique. The
value of this capacitor must be optimized, since it influences both the self-excitation stability and the regulator
efficiency. We recommend using a 2.2-μF 25-V OS (Organic Semiconductor) capacitor with a low series resistance
and good temperature characteristics. Note that for the same reason a 2.2-Ω 1/2-W resistor should be used for the
associated resistor R6.
R5
Standby switch current limiter resistor. A value of 10 kΩ is recommended. (When the voltage applied to the standby
switch is in the range 3 to 13.2 V.) Note that this resistor cannot be removed from this circuit.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LA4B-M1C2LV-W | 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 |
| LA4CA00 | 制造商:TE Connectivity 功能描述: |
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