Please advise the adjustment range of output voltage for Ch2. Datasheet doensn’t include this data, whilst Ch1 range is given as: CH1: 22.8 ~ 26.4V. Please do not just assume same percentual range as for Ch1. I need a factual statement.
Datasheet information unclear. Sent this request to OEM:
What are the characteristics for channel #2 of the RD-125-2448?
Is it fixed or adjustable?
If adjustable what is the range?
Sincerely,
Aaron
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Typical practice for multi-output supplies of the type is to regulate one output considered “primary” and rely on transformer winding ratios to secure the other outputs. This supply appears to follow this norm based on the block diagram, poorer regulation specs for channel 2, the (poorer) regulation spec for channel 2 only being assured at substantial load, and presence of a single adjustment potentiometer.
I can’t recall the last time I saw a multi-output supply with independently-regulated/adjustable outputs that wasn’t based on a configurable/modular wherein each output is derived using a dedicated switching circuit. These will naturally come at substantially greater price.
Thanks Rick. I had that thought but wasn’t sure that’s why I asked.
I built SMPS’s with 3 and more independently regulated outputs and with logic so for instance if neg 15V fails all shuts down (saving other circuitry) and more features like crowbar “fuse”, but yes all comes down to a price.
In this case I agree the 24V channel which is obviously the regulated and adjustable channel is the master/reference and the 48V channel is staying in the same ratio. (as shown in the block diagram)
I need the 50V spot on for this project where I have to build about 10 units, and want to prevent buying unsuitable parts, the 24V is not critical in a range of 10+/-10% hence when I trim the 24V up to 25V (which is in the range) I should be able to get the 50V on channel 2.
I will end up buying just one of those PSU’s to verify that.
Thanks again for your assistance. HK