Ok.

I have a 12V 7.5Ah SLA battery and L200 IC constant voltage charge circuit. My voltmeter shows me 14.5V witout the load.I connect the circuit to the emtpy battery i see 11V and when the battery is full 13.9V. I think everything is normal for this charge technic. Because i use constant voltage charge.

But I don't know what should i do if i use boost type charge. Please correct me if i'm wrong:
-Pic will control the battery voltage for charge status. I think this is easy.
-How can we udjust the i.e LM3588 with a pic ?

Thanks...