Author Topic: Low power (<10uA ideal) Ideal diode, up to 13v  (Read 769 times)

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Offline Tangent_TrackerTopic starter

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Low power (<10uA ideal) Ideal diode, up to 13v
« on: April 11, 2024, 11:06:03 am »
So as per the title, all the ideal diodes that are low power consumption seem to cap at 5v5, maybe 6, but I would like one that caps at minimum, 13v (3 lipos series, so 12v6 to be exact), current 500mA would be nice but ok with about 100mA, so not asking a huge amount!

While I can find these, they stop caring about supply current which goes into the hundreds of uA!

Anyone got any suggestions please?
« Last Edit: April 11, 2024, 11:10:09 am by Tangent_Tracker »
 

Offline xvr

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Re: Low power (<10uA ideal) Ideal diode, up to 13v
« Reply #1 on: April 11, 2024, 11:40:01 am »
P channel mosfet is not enough?
 

Offline Tangent_TrackerTopic starter

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Re: Low power (<10uA ideal) Ideal diode, up to 13v
« Reply #2 on: April 11, 2024, 09:07:05 pm »
trouble is, all circuits have leakage to ground via resistors and transistors etc...
 

Offline PCB.Wiz

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Re: Low power (<10uA ideal) Ideal diode, up to 13v
« Reply #3 on: April 11, 2024, 09:12:24 pm »
trouble is, all circuits have leakage to ground via resistors and transistors etc...

There is an inherent speed / power trade off. 

How fast do you need this to work, and how dynamic is the reverse operation ? 

eg a circuit like this can be scaled for speed/current trade off.

https://www.powerelectronictips.com/inexpensive-ideal-diode-mosfet-circuit/

Addit: One caution with that circuit, the reverse base-emitter breakdown needs watching at higher operating voltages.
Diodes Inc have a DZDH0401DW, that claims 40-50V reverse so presumably they address that.

« Last Edit: April 11, 2024, 10:05:20 pm by PCB.Wiz »
 
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Offline spostma

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Re: Low power (<10uA ideal) Ideal diode, up to 13v
« Reply #4 on: April 11, 2024, 09:25:39 pm »
Microsemi SFDS1045LH ideal solar diode might be a suitable choice: 0.5uA @ 45V leakage current / max. 10A forward current
 
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Offline Tangent_TrackerTopic starter

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Re: Low power (<10uA ideal) Ideal diode, up to 13v
« Reply #5 on: April 16, 2024, 12:41:40 pm »
That looks a good option, I was hoping for something all in one package tbh, but beggar's and choosers and all that!
 


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