![]() |
|
|
Thread Tools | Display Modes |
![]() |
#21 |
Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
|
![]() Hello
MP3398A protection pin find, unfortunately google doesn't tell me much about this MP3398A chip many thanks Last edited by samtron786; 04-07-2021 at 11:31 AM.. |
![]() |
![]() |
![]() |
#22 |
Badcaps Veteran
Join Date: Aug 2015
City & State: Cardiff
My Country: Wales
Line Voltage: 230V AC, 50Hz
I'm a: Hobbyist Tech
Posts: 6,544
|
![]() The data sheet says operating voltage between 5 to 28 volts, VCC pin = 6 volts, Enable pin =>1.8 volts
What voltages do you have?
__________________
Willing to help but I'm no expert. |
![]() |
![]() |
![]() |
#23 |
Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
|
![]() I can't measure that, I have to turn the power supply, but how? :-)
I have no problems with LED all are fine I have two Power supplies bought the same problem Find MP3398A protection pin Last edited by samtron786; 04-07-2021 at 01:11 PM.. |
![]() |
![]() |
![]() |
#24 |
Badcaps Veteran
Join Date: Aug 2015
City & State: Cardiff
My Country: Wales
Line Voltage: 230V AC, 50Hz
I'm a: Hobbyist Tech
Posts: 6,544
|
![]() If the leds are fine then what is the problem?
|
![]() |
![]() |
![]() |
#25 |
Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
|
![]() hello i have found something in google with power supply not the place, can you please mark the place for me?
ISET two resistors 5.09 K ohm and 4.68 K ohm Try the 6th leg (ISET) to increase resistance. Instead of 7 kOhm, use 12 kOhm, the current drops and the voltage protection no longer works. Last edited by samtron786; 04-08-2021 at 01:52 AM.. |
![]() |
![]() |
![]() |
#26 |
Badcaps Veteran
Join Date: Aug 2014
City & State: Vologda
My Country: Russia
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 481
|
![]() Hi,
Remove the resistor 4701 from the red circle and solder it instead for example resistor 103 |
![]() |
![]() |
![]() |
#27 |
Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
|
![]() |
![]() |
![]() |
![]() |
#28 |
Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
|
![]() Unfortunately that didn't help me
|
![]() |
![]() |
![]() |
#29 |
Member
Join Date: Aug 2016
City & State: NRW
My Country: germany
I'm a: Knowledge Seeker
Posts: 66
|
![]() I tested the LED again, they are all fine
|
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | |
|
|