Hitachi Power LED flashing

[samtron786]

Re: Hitachi Power LED flashing

Hello
MP3398A protection pin find, unfortunately google doesn't tell me much about this MP3398A chip
many thanks

[dick_barton]

Re: Hitachi Power LED flashing

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?

[samtron786]

Re: Hitachi Power LED flashing

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

[dick_barton]

Re: Hitachi Power LED flashing

If the leds are fine then what is the problem?

[samtron786]

Re: Hitachi Power LED flashing

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.

[kasfamily]

Re: Hitachi Power LED flashing

Hi,
Remove the resistor 4701 from the red circle and solder it instead for example resistor 103

[samtron786]

Re: Hitachi Power LED flashing

Hi,
Remove the resistor 4701 from the red circle and solder it instead for example resistor 103

many thanks

[samtron786]

Re: Hitachi Power LED flashing

Unfortunately that didn't help me

[samtron786]

Re: Hitachi Power LED flashing

I tested the LED again, they are all fine

[bosmarin]

Re: Hitachi Power LED flashing

47 mF 160v