This Sealed Lead Acid Battery Charger is deigned using the LT3755 DC DC controller. The LT3755 is a DC DC controller designed to operate as a constant-current source and supports a wide input voltage range from 4. 5 up to 40 volts and a can provide a maximum output voltage of 70 volts. The main features of this Sealed Lead Acid (SLA) Battery Char
ger circuit are : adjustable frequency 100kHz to 1MHz, low shutdown current: <1 A, constant-current and constant-voltage regulation.