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Class D Switching Power Amplifiers and Power D/A conversion

Dual Inductor in Class D Amplifier.
Dual Inductor in Class D Amplifier.
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Old 18th March 2020, 09:27 PM   #11
nigelwright7557 is offline nigelwright7557  United Kingdom
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Originally Posted by bucks bunny View Post
1. The position of the phase dots
2. The description "inductor" (instead of choke)
3. A value of 10uH/6A
gives me a strong indication of a pair of output inductors for a class-d-amp. These may or may be not tightly coupled.
More likely is the loose coupling.

An appropriate common mode choke should exhibit significant larger inductance.
A common mode choke is marked differently to the one given.
Note continuous lines along sides.
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Old 18th March 2020, 09:38 PM   #12
bucks bunny is offline bucks bunny  Germany
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this is a confirmation of my topic 1
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Old 18th March 2020, 09:44 PM   #13
Neil Davis is offline Neil Davis  United States
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Dual Inductor in Class D Amplifier.
Here is the main page: WE-HIDA THT High Current Inductor | Passive Components | Wurth Elektronik Product Catalog. Under "Characteristics" it says: 2-in-1 designs with low magnetic coupling. Also, the page linked above says the dot indicates "start of winding".

These have been around a long time. Here is a link to a dual from Coilcraft that I used about 10 years ago: https://www.coilcraft.com/pdfs/ga3416.pdf

Another dual from Sagami SMD Inductors for Class D DBE1010HB | SAGAMI ELEC CO., LTD.

Here is a quad: Leaded Inductors for Class D DVX1315H | SAGAMI ELEC CO., LTD.
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