UC3906 Battery Charger

Lestraveled

Joined May 19, 2014
1,946
You must have miss read the information. The transformer is described as a 30 VA, 1.25 amp, 18Volt transformer. 30 VA means 30 Volt Amps, or watts with a resistive load.
 

Thread Starter

ShayanFiroozi

Joined Nov 18, 2015
41
You must have miss read the information. The transformer is described as a 30 VA, 1.25 amp, 18Volt transformer. 30 VA means 30 Volt Amps, or watts with a resistive load.
Wow,of course I missed it !! And what about battery ??? does this circuit detect amperage for my battery to provide proper amperage for charging it??
Thank you
 

Lestraveled

Joined May 19, 2014
1,946
The UC3906, during bulk charge, outputs a constant current. It does not matter what size the battery is. The UC3906 does not sense the size or current of the battery, it simply outputs a fixed current (in bulk mode).
 

Thread Starter

ShayanFiroozi

Joined Nov 18, 2015
41
The UC3906, during bulk charge, outputs a constant current. It does not matter what size the battery is. The UC3906 does not sense the size or current of the battery, it simply outputs a fixed current (in bulk mode).
thank you Lestraveled

but i think it's a 3 stage charger !! so it's not safe for a 12volts 2.2AH or 4.5AH battery ??
how can i solve this problem ?
 
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