Need help, please, for a lead acid battery charger.

delta67

New member
Hi all,
I have an AT power supply and I want to convert it to a lead acid battery charger.
The battery is a normal 12V for cars 75-100 AH.
The PS is build arround TL494 and there is an LM393N IC.
- What is the max voltage I can get from the 12V rail.
- Can I use the 5V's coil (on the coupled inductor) to filter the 12V rail instead of the 12V's one (which is thinner)?
- What is the simple and efficient ways to add short circuit and over current protections?
- Can I stripp down the LM393N circuit?
- Any other ideas ?
Many thanks
 
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