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subwoofer plate amplifier AIYIMA 25A EMI Power Filter Board Anti-interference AC Power Filter Power Supply For Speaker Amplifier DIY best stereo amplifier Audio Amplifier Boards
Code: TD-4000895158911
111 orders
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$ 35.54
$ 39.25
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| Brand Name: | Aiyima |
|---|---|
| Certification: | NONE |
| Origin: | CN(Origin) |
| Maximum Power Per Channel: | NO POWER |
| Model Number: | 2A 4A 15A 25A |
| Package: | Yes |
| Channels: | 2 (2.0) |
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Product description:
Introduction of EMI power filter circuit:
The circuit is composed of three parts, the first part is the differential mode filter part, the second part is the common mode filter circuit, and the third part is fuse, equipped with a fuse holder. Replaceable fuses of different specifications.
The internal circuit of the two-stage composite EMI filter, because of the two-stage (also known as two-section) filtering, so the effect of filtering noise is better. For some users, the problem of fast transient group pulse interference with a repetition frequency of several kilohertz can be suppressed.
The PCB specification is FR4 83X42X1.6MM, the shortest design of the high-current circuit, the path is short, it can withstand more current and less interference to the outside world.
There are four specifications of common mode inductance: 2A, 4A, 15A and 25A.
2A common mode inductor filter.
4A common mode inductor filter
15A flat copper tape common mode inductor
25A flat copper tape common mode inductor and iron silicon aluminum differential mode inductor
Note: 2A and 4A filters are equipped with 5A fuses as standard, 15A and 25A filters are equipped with 20A fuses as standard.
This product is used in conjunction with the decoder or power amplifier to filter high-frequency noise from the power supply, eliminate mains interference, and purify the power supply. It can significantly improve the sound quality of the power amplifier, increase the resolution, and make the background quiet.
The input GND needs to be connected to the ground wire of the power
The following is some common knowledge of high frequency electromagnetic interference EMI filter.
For high-frequency electromagnetic interference (EMI), generally three techniques can be used for power supply filtering, which can suppress interference noise. In actual use, two or more of these techniques are often mixed. They are:
1. Add a capacitor between the live and neutral lines of the power supply, that is, the X capacitor. Choose X2 type, the main function is to eliminate common mode interference, the capacity range is 0.01UF --- 0.47UF.
2. Add a capacitor between the power line and the ground line, that is, Y capacitor. The Y2 type is selected to eliminate crosstalk interference, and the capacity range is 2200pF ～ 0.1μF. In order to reduce the leakage current, the electric capacity should not exceed 0.1μF, this circuit board uses 3300PF.
3. Common mode suppression, common mode inductance (suppression coils on the two power lines), when the rated current is large, the wire diameter of the common mode choke should also be increased accordingly, so as to be able to withstand larger currents. In addition, appropriate increase in inductance can improve low-frequency attenuation characteristics, this line uses 10MH.
4. Poor touch suppression, poor touch inductance, and suppression of series mode interference between power lines.
Package included:
1Pcs
DELIVERY ESTIMATE
We processes orders between Monday and Friday. Orders will be processed within 5 business days of ordering and shipped the next day after the processing day. Please note that we don't ship on weekends.
We deliver your orders in 15-20 working days (free shipping), International orders delivery is subjected to the policy of third party courier service, and differs from country to country basis.
Due to the Covid-19 pandemic, you may experience delivery delays but we are committed to getting your order to you as soon as possible.
Note: Please ensure all delivery information is correct. If there is incorrect and/or missing information, we may be required to contact you to update the delivery information, which may cause delays in delivering your order. Delays may also occur as a result of customs clearance.
RETURN POLICY
At MMO-Dropship we strive to make our customers 100% satisfied with the product they’ve purchased from us. If you are experiencing any shipping or products issues, and you’re feeling frustrated, then please send us an email and our team will assist you right away.
We have a 7-day return policy, which means you have 7 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at [email protected]. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at [email protected].
DAMAGED ITEM AND LOW QUALITY
For the fastest resolution, please include a photograph demonstrating the poor quality or the damaged area of the item. The most optimal pictures are on a flat surface, with the tag and error clearly displayed.
We will use this information to help you with your order, and eliminate errors in future.
REFUND POLICY
If you feel the product that you’ve purchased does not show the requirements that you initially had in mind, then you do have the option to request a refund.
Here are the circumstances in which refunds will be granted:
You can get a refund if:
- You aren't happy with your order: You’ve purchased your MMO-Dropship products in the last 7 days and want to return them, we will process full refund as soon as possible when we receive the items from you
- The product you’ve purchased is completely non-functional
- You did not receive your product within 60 business days or 90 business days (South America) of purchase
Please note that refunds can take 3-5 business days to return in your account.
You can always contact us for any return question at [email protected].
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