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Old 11-06-2021, 12:24 AM   #41
eccerr0r
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Default Re: I need a charger schematic YLT6722000

Not sure if duty cycle would cause more ringing but if the frequency goes up the ringing would occur more often, but it's not frequency that determines energy transferred, it's duty cycle... though would be interesting what PWM chip this thing uses, can't read the chip number.

But it is weird that the MUR1060FCT (50ns recovery) is indeed an ultra fast recovery diode and not the FR207 (0.5S recovery). Still doesn't beat that one SMPS PSU I had that actually did use a 1N4007 (30s recovery) as the auxiliary power rectifier... That definitely got hot and fried itself...
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Old 11-06-2021, 08:10 AM   #42
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Default Re: I need a charger schematic YLT6722000

Checked all the resistors are ok, replaced the diode FR207 with FR104 150nsec (was available) charge 4 hours the battery 60v, diode temperature 42C MUR1060CT 58C
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Old 11-06-2021, 12:32 PM   #43
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Default Re: I need a charger schematic YLT6722000

The battery is fully charged with no errors
Thank you all very much for your help
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Old 11-06-2021, 03:32 PM   #44
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Default Re: I need a charger schematic YLT6722000

[QUOTE=Alexbp;1082466]Checked all the resistors are ok, replaced the diode FR207 with FR104 150nsec (was available) charge 4 hours the battery 60v, diode temperature 42C MUR1060CT 58C[/QUOTE

I am hoping that's a typo. You changed out the FR207 (2A 1kV) for a FR104 (1A 400V)? That's not good!
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Old 11-06-2021, 11:58 PM   #45
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Default Re: I need a charger schematic YLT6722000

That diode is on a circuit powering a LM358 and some random circuitry I think, so it couldn't be worse than 72 volts P-P, and definitely does not draw much current.

The speed is what mattered apparently. Only ~ 3x faster but if it made the difference, it made the difference.
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Old 11-07-2021, 10:24 AM   #46
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Default Re: I need a charger schematic YLT6722000

Well, personally I’d stay away from the fr diodes.
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Old 11-07-2021, 11:21 AM   #47
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Default Re: I need a charger schematic YLT6722000

seems like that's a good idea, though surprised the FR207 is that slow...then again it's still 60x faster than 1N4007.
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