Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1205
| Posted: 12:50am 29 Jul 2024 |
I believe KeepIS had tried (all?) various fault modes, there is the main battery supply (typically ~ 50VDC) that converts down to 12V which is not used by the controller card except for powering the on board logic 5V regulator and for powering any relays that may be connected to the relay FET switches. The 12V is also passed along to the FET Power board to power the 3 x isolated 12VDC-12VDC power supplies. If the 5V dies the logic and opto drives stop. if the 12V dies the Power PCB won't function - if the 12V deteriorates to a lower value then the LV cutoff of the opto FET drives will stop them from driving the FETs.
I contacted JLCPCB who deny any knowledge that this actually happens, they said "you need to contact LCSC to ask whether they are able to combine their shipment with the same carrier that JLCPCB uses" - I haven't gone any further with this. I am not saying that others are incorrect in their experience, but given the companies seem to have a connection maybe their left hand did not know what their right hand was up to and it may or may not still be this way ???
Edit: I just went to the JLCPCB site and in the left column there is a Parts Manager button, which opens up further buttons, one is order parts so I pressed it and tried HY5608 their price was $1.93 compared to LCSC $1.81 I believe both is $USD. I have no idea if JLPCB stock lines are exactly what LCSC uses but this is a way to order some parts and avoid extra the shipping costs from LCSC which from memory are about $17USD minimum) per order(.
Later Edit: Well what do you know, JLCPCB use a part number of C2760540 for the HY5608, which is the exact number LCSC uses, what an amazing coincidence? I expect if JLPCB boards and JLPCB parts are ordered at the same time shipping will be combined
Even Later Edit: Yesterday I placed an order for 5 x PCBs today I just went to confirm LCSC's shipping price for 30 HY5608s and it shows as Shipping Free which I guess confirms what was said by others and still holds - place order for PCBs and a few hours later place an order with LCSC, you get LCSC's best pricing and free shipping !!
The capacitor boards do not overhang the Power PCB. However if they are mounted with any screw slackness bias maybe ~0.25mm overhang might be possible. The delivered Capacitor PCBs would have an overhang if the excess area was not cut off. The overhang part is meant to be removed (cut along the line) and then further cut down along the silk screen lines to form 20 little predrilled square insulators which can be used on top of the TO220 insulating bushes to further protect any screw/nut/spring washer damage to the bushes whilst also providing extra clearance. If the largest diameter capacitors are used ~35mm then they overhand the edge of the CAP board to the outside by about 2mm.
Edited 2024-07-29 12:03 by wiseguy