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isolated dcdc concerns

Sniper2 , 08-26-2024, 02:10 PM
So I am using a +-15v dcdc module sip7.
Due to the way my circuit works I will use like x2 more current from the positive rail .
Well it is like 5ma vs 10ma ......
I was wandering if this is a problem?
Also I expect to exta prop on positive side but will the 2 rails somehow drift ?
Should I bother to balance the expected load with some resistors on the negative rail?
QDrives , 08-26-2024, 07:21 PM
Do you have a datasheet for more details?
Anyhow, most DC-DC modules are not properly controlled.
Sniper2 , 08-27-2024, 04:11 AM
Controlled? As in what fb?
Sniper2 , 08-27-2024, 05:22 AM
Ec3saw 24s15p
QDrives , 08-27-2024, 08:53 PM
Controlled as in regulated output. This one does have a regulator.
Did you read this:
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Cross Regulation (Dual)(note 4) … Asymmetrical Load 25%/100% ….. ±5.0% max
4. For asymmetric loading both channels must be at 25% load or more
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Not that it makes it (very) clear...
Does that mean that you should not load asymmetrically below 25%? (which you would do).


This is what the FAQ states on site (Q9 https://www.cincon.com/info_en_2.php?id=6915 ):
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Some unregulated converters feature power sharing, where all or some of the load can be taken from just one output pin.

Regulated dual output converters regulate the voltage between +Vout and -Vout and allow the common pin to float. (So if a +/-15V is asymmetrically loaded with, say +80%, -20%, then the output voltage difference will stay 30V, but the common pin will drift so that the output voltage will measure +13, -17V, for example). If a balanced output is required with unbalanced load, then use post-regulation to stabilize the outputs.

Please see cross regulation specification in datasheet for detail.
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