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参数资料
| 型号： | YDA138-EZ |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO42 |
| 封装： | LEAD FREE, PLASTIC, SSOP-42 |
| 文件页数： | 20/20页 |
| 文件大小： | 1198K |
| 代理商： | YDA138-EZ |
YDA138
9
●
Pop Noise Reduction Function
The Pop Noise Reduction Function works in the following cases: Power-on, Power-off, Sleep ON/OFF, Mute ON/OFF, and
switching time between headphone amplifier and digital amplifier.
Pop noise at the Power-on, Power-off, and Sleep ON/OFF depends on the value of DC-cut capacitor for audio input signal.
The smaller the value, the greater the effect on the pop noise reduction; however, 1F of capacitance is recommended in the
consideration of the low frequency cutoff.
●
Correspond to Filter less
Normally, when LC filter is not used, carrier signal of 50% modulation comes into speaker even in MUTE state and causes
significant loss, and as the result the speaker is heated.
Generally, 10W speaker or so is considered to have inductance component of not less than 20H.
In the modulation method of YDA138, duty ratio of the carrier signal is several % in the MUTE state, so the speaker
inductance component can sufficiently inhibit speaker loss without LC filter; therefore, the speaker is not heated.
●
Speaker Inductance
When YDA138 is used without LC filter, speaker inductance component reduces speaker loss in the MUTE state; therefore,
use a speaker with inductance component of 20H or more at the carrier clock frequency.
●
LC Filter
When connecting LC filters to YDA138, make the following LC filter circuit. Use the following constant in accordance
with speaker impedance. By using the following constant, low-pass filter with cutoff frequency=50kHz or so, Q=0.7 or so is
configured.
LC Filter Constant
RL
L1
C1
C2
4Ω
10μH
0.47μF
0.01μF
8Ω
22μH
0.22μF
0.01μF
16Ω
47μH
0.11μF
0.01μF
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| YDA139-EZ | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
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| YDA142-EZ | 9.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO52 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| YDA139 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:D- 4 STEREO 2.5W DIGITAL AUDIO POWER AMPLIFIER |
| YDA142 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:D- 3D DIGITAL INPUT STEREO 9.5W DIGITAL AUDIO POWER AMPLIFIER |
| YDA143 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:D- 3M STEREO 15W DIGITAL AUDIO POWER AMPLIFIER |
| YDA144 | 制造商:YAMAHA 制造商全称:YAMAHA CORPORATION 功能描述:STEREO 2.1W Non-Clip DIGITAL AUDIO POWER AMPLIFIER |
| YDA148-QZ | 制造商:Yamaha Corp Of America 功能描述:STEREO 5W - 15W DIGITAL AUDIO POWER AMPLIFIER, QFN32 |
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