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3 phase High voltage ac to low power 5V dc out
1. I have a schematic here, attached   2) I have put these specs in e-design suite from ST Vin: 85V-600Vac Vout: 5V/470mA It generates below diagram: But I have below...
Monday, 28 September 2020 - 14:23
3 phase High voltage ac to low power 5V dc out
Need to make something like this only. 1. This have Ultra-wide range: 90–600 VAC or 60–870 VDC  . In my case 600Vac is worst case max with all the error margins.  2...
Saturday, 26 September 2020 - 15:29
3 phase High voltage ac to low power 5V dc out
is the selection of varistor ok?  600Vac is absolute max in system. https://www.digikey.com/product-...
Saturday, 26 September 2020 - 14:38
3 phase High voltage ac to low power 5V dc out
1. Yes easy to use by single phase and neutral.   2. But if I use like this? The output dc will go to max 850Vdc?   Advantage is here, if one phase get missing/...
Friday, 25 September 2020 - 14:55
3 phase High voltage ac to low power 5V dc out
1. Yes if its single phase 85V-600Vac, I can use VIPER267K from ST (1050V BVDSS).   2. If I use like this to make dc from all three phase with neutral what would be peak...
Friday, 25 September 2020 - 05:38
Low cost mosfet replacement for diode in boost application
I think synchronous boost would be better choice.
Sunday, 6 September 2020 - 14:31
Alternative freelancing websites
Yes you are right freelancer seems to be too mixed up then upwork ... (my experience only) I was looking at uteam also, here company can offer/hire for OEM/ODM serices . Any other...
Friday, 28 August 2020 - 15:15
MCU PWM from 5V to 10V
1. I was reading here:  https://electronics.stackexchange.com/questions/461049/meanwell-3-in-1-dimming       2. Although not sure if this is the case with...
Saturday, 22 August 2020 - 06:00
MCU PWM from 5V to 10V
@ Kartman ,without R1, when opto is on, it will short 10V to GND no? @ N.Winterbottom , yes forgot to add, in#11 updated
Friday, 21 August 2020 - 15:18
MCU PWM from 5V to 10V
  Is this how you are saying? 1. I heard back from meanwell, they said its TTL with 100uA typical current. 2. My PWM freq is around 2KHZ, never used opto for PWM.  3...
Friday, 21 August 2020 - 11:02
MCU PWM from 5V to 10V
  Yes as I said in circuit DIM- is not shorted to V-.  DIM- is shorted to micro-controller ground, & micro-controller  is differnet than V- Or I am missing...
Friday, 21 August 2020 - 09:43
MCU PWM from 5V to 10V
1. attached is circuit to drive three meanwell drivers independently. ( https://www.digikey.in/product-d... )   2. MCU is 5V powered, but driver need 10V to control at DIM+...
Friday, 21 August 2020 - 07:59

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