Help required for this SMPS Battery Charger

xyz9915 · 06-07-2008, 12:15 AM

Hi! The attached file is a schematic of 50KHz SMPS power supply which uses 325 VDC (after rectification of Mains 240 V). The required current for charging Lead Acid battery is approx 20 Amperes. Please give comment if any modification in the circuit is required. (note: isolated 12V DC is used for control circuit)
Voltage regulation is not necessary.

xyz9915 · 06-07-2008, 11:18 PM

The changes/modification proposed by the friends, and thinking that the half bridge topology is better for converting AC mains voltage to low voltage, the modified circuit is attached herewith with feedback control circuitry to keep the design stable. Please point out if any further modification is required.

xyz9915 · 06-08-2008, 11:10 PM

Thanks for helping & providing tips to build the charger unit.Following modification in the circuit is made with Opto feedback control circuitry to keep the design stable. Opto is used for a simple current regulation. Please point out if any further modification is required.