DC2464A-A

DC2464A-A demonstration circuit is a supercapacitor charger and backup controller with a hot-swappable front end plus supercapacitor health and system monitoring featuring the LTC®3351. The LTC3351 includes a buck supercapacitor charger and a backup boost controller. It has dual input hot swap FETs to control the inrush current when connected and to disconnect the input supply when an over-current fault or input power loss occurs. An output ideal diode allows the supercapacitors to supply the output when VCAP is above the set backup voltage. As the capacitor stack voltage drops down to the set output voltage, the LTC3351 will operate as a boost regulator to supply the output until the energy in the supercapacitors is depleted.

• Input supply range from 11V to 18V
• 2.67A charger input current limit
• 6V typ VOUT backup operating voltage (Boost mode)
• 25W typ POUT maximum backup power (Boost mode)
• 5.33A typ max charge current