New Coilcraft AGM2222 inductors for output filters for Class D amps?

This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Here is the press release:
"Coilcraft’s new AGM2222 Series power inductors offer current ratings up to 110 Amps and very low DCR in a package measuring just 22 X 22 X 23 mm, a 73% volume reduction from previous-generation products. This significant improvement in power density makes the AGM2222 ideal for high-current applications including automotive bi-directional 12 V – 48 V DC-DC converters.
The AGM2222 Series is available in 13 inductance values from 1.9 to 10 µH. It is qualified to AEC-Q200 Grade 1 (-40°C to 125°C ambient), making it ideal for automotive and other high-temperature applications. Soft saturation is stable over temperature and enables high peak current handling. Magnetic shielding reduces EMI at high switching frequencies."

Here are the specifications: AGM2222 High Current Power Inductors | Coilcraft
Here are Inductance vs Current graphics: Typical Current vs Frequency - AGM2222 Shielded Power Inductors
Here are Inductance vs Frequency graphics: Typical Inductance vs Frequency - AGM2222 Shielded Power Inductors

I asked Coilcraft for the voltage ratings of these inductors and they responded, that all are tested at 100Vrms for 1 second, when they are manufactured.
So, I think these inductors will be very good for TPA3255 and similar power amplifiers, with single power supply under 80V, or for dual power supply up to +/-40V.

What do you think about them?
Will they be good for Class D amplifiers?
With the maximum inductance of 10uH they might well be OK for 4ohm speakers. Higher impedances though would need to look to another range. Since the core material is powdered iron, what are the losses like at ~500kHz? Normally powdered iron is fairly lossy at higher frequencies and the wire doesn't look to be litz.
I've received 3 free samples of AGM2222 with 10uH inductance:

When I have time, I will try to compare AGM2222 to the SER2918H, but it is 22uH...
Both look very massive!
And both are heavy :)
Disabled Account
Joined 2010
All measurements I've seen proved gapped ferrite being the most linear core material. Any kind of iron powder including carbonyl is inferior.
Btw coilcraft recommends these inductors for dc-dc converter claiming compact size and low loss - but no recommandation for class-D here.
Linearity is not related to low loss - I found lowest losses with carbonyl cores.
Last edited:
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.