Hi diy'ers, want some recommends I've previously asked perhaps in the wrong forum section, about the Hypex UcD700HG/HxR with an existing linear power supply and a custom made control/protection board.
However my main concern now is the protection trigger circuit, this has to be triggered if the UcD module pull to low the pin-10, but looking carefully the pdf datasheet of both modules, the UcD700 seems to have a 47k resistor in between while the UcD2k just directly pull to ground pin-10 without any resistor apparently, and the simple protection circuit I've designed need at least ~2mA to trigger the optocoupler reliably.
Unfortunately the closest optocoupler I've simulated on LTspice was the PC817A, but I have no way to simulate the SFH617A-4 since is not in the component list of the latest LTspice, also the SFH617A-4 will be feed with +24v through a 10k resistor and tested ok on the bench, however I can't activate it through a 47k resistor.
Hope some experienced users with the UcD700HG and the UcD2k can confirm this, so I can design a more sensitive/discrete trigger protection circuit or just find some PC817A replacement before ordering the PCB's.
Here is the DC-Error/Protection circuit of the Hypex modules:
UcD700HG:
UcD2k:
Also re-post the project in question images for reference:
Regards!
However my main concern now is the protection trigger circuit, this has to be triggered if the UcD module pull to low the pin-10, but looking carefully the pdf datasheet of both modules, the UcD700 seems to have a 47k resistor in between while the UcD2k just directly pull to ground pin-10 without any resistor apparently, and the simple protection circuit I've designed need at least ~2mA to trigger the optocoupler reliably.
Unfortunately the closest optocoupler I've simulated on LTspice was the PC817A, but I have no way to simulate the SFH617A-4 since is not in the component list of the latest LTspice, also the SFH617A-4 will be feed with +24v through a 10k resistor and tested ok on the bench, however I can't activate it through a 47k resistor.
Hope some experienced users with the UcD700HG and the UcD2k can confirm this, so I can design a more sensitive/discrete trigger protection circuit or just find some PC817A replacement before ordering the PCB's.
Here is the DC-Error/Protection circuit of the Hypex modules:
UcD700HG:
UcD2k:
Also re-post the project in question images for reference:
Regards!
Just in case someone is asking the same question as me, I will share the resent e-mail response I've got from: Jos Wolthuis, a technical support engineer from Hypex.
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Hello Jose,
See below for actual circuit on de UcD700LZ. There is no resistor and neither is on the UcD2k.
Kind regards,
Jos Wolthuis | Hypex Electronics BV | Technical Support Engineer | www.hypex.nl |
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Regards!
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Hello Jose,
See below for actual circuit on de UcD700LZ. There is no resistor and neither is on the UcD2k.
Kind regards,
Jos Wolthuis | Hypex Electronics BV | Technical Support Engineer | www.hypex.nl |
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Regards!