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-   -   Ideal bridge rectifier GB (https://www.diyaudio.com/forums/group-buys/333844-ideal-bridge-rectifier-gb.html)

tvicol 12th February 2019 06:44 AM

Ideal bridge rectifier GB
 
https://evotronix.eu/img/saligny/Saligny.jpg

I had a look on the market, did not find one, so we built one. :)
We have designed a small form synchronous rectifier, aka ideal bridge, using modern ultra low Rdson mosfets.
It started as a small side project, but the results are so good that we want to put this in production and make it a standard product.
The advantages of such bridge are very well documented:
Active rectification - Wikipedia
http://www.ti.com/lit/wp/snva595a/snva595a.pdf
Synchronous Rectifier Circuit | Active Rectifier | Radio-Electronics.Com
http://peufeu.free.fr/audio/alim_mos_diode/


Linear product presentation.
https://www.youtube.com/watch?v=x74SSPgKiNA

While this video is about automotive product, the principle is similar.
https://www.youtube.com/watch?v=X5qFJ5XNi9A



Specifications:
- operates from DC to 600Hz
- AC operating voltage 6Vac to 51Vac
- DC operating voltage 9Vdc to 72Vdc
- Iq = 1,5mA
- continuous load current up to 16A or more depending on mosfet configuration.

The price will start from 35euro and go down with volume as we get parts in lower price.
Up to 100 units - 35 euro
Up to 200 units - 30 euro
Over 200 units - 25 euro

GB google spreadsheet is open till 1st March included
https://docs.google.com/spreadsheets...it?usp=sharing

Regards,
Tibi

tvicol 12th February 2019 06:49 AM

3 Attachment(s)
Installed on ultra low noise regulator, Zeno.

Regards,
Tibi

tvicol 12th February 2019 06:52 AM

3 Attachment(s)
Compared with a diode bridge Saligny (ideal bridge) will deliver 1,5V more.
Here is thermal comparison at same output 8V and load 500mA.

Regards,
Tibi

tvicol 12th February 2019 06:58 AM

If you fight with power loss in your class A amplifier rectifier, than Saligny can help you.
If you want better dynamics and response in your class AB amplifier, than Saligny can help you.
If you want to get rid of diode switching noise, than Saligny can help you.
If you want to make your amplifier more green, than Saligny can help you.
If you want to contribute to climate change, than Saligny can help you.
If you want something cool, than Saligny can help you.

:D

Regards,
Tibi

jan.didden 12th February 2019 06:59 AM

Very interesting, well executed! Do you have a spec for single pulse (at switch-on) and repeated (cap charge) pulse current?

Jan

tvicol 12th February 2019 07:11 AM

Hi Jan,

Thank you !
I will measure at switch-on and post here.
About cap charge, we are using 3mohm and 7mohm mosfets. These are rated over 100A in short impulse ≤100 μs, duty cycle ≤1%.

Regards,
Tibi

jan.didden 12th February 2019 07:21 AM

No I mean, if you switch on the equipment, there will be a one-time inrush current to charge the empty capacitor. That can be many tens of Amps. Normally the MOSFETs have a single pulse current rating, and a repeated pulse rating.
Are you willing to give the MOSFET types? Through PM, confidential if you want.

Jan

analog_sa 12th February 2019 07:28 AM

Have you considered using GaN transistors?

tvicol 12th February 2019 07:37 AM

Jan, you have PM.

Analog_sa, can you give me a suggestion of GaN transistor that may fit such design ?

Regards,
Tibi

jan.didden 12th February 2019 07:42 AM

I would like to sign up for a pair. Should be very useful for my power amp, to keep it a bit cooler and get just a bit more voltage out of the power supply.

Jan


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