DC2464A-B: 18V, 36W Hot Swappable Supercapacitor Charger, Backup Controller and System Monitor

Summary

Demonstration circuit 2464A-B is a supercapacitor charger and backup controller with a hot swappable front end plus supercapacitor health and system monitoring; featuring the LTC3351. 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.

Specifications

Manufacturer	Analog Devices Inc.
Category	Power Management
Sub-Category	Capacitor Chargers
Eval Board Part Number	505-DC2464A-B-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Capacitor Type	Super Capacitor
Function	Backup Power Controller
Number of Capacitors	Up to 4
Voltage In	20 ~ 30 V
Voltage Out (Max)	18 V
Charge Current (Max)	6.4 A
Topology	Buck
Features	Backup Controller Cell Monitoring Hot Swap Controller
Quiescent Current	2.25 mA
Component Count + Extras	58 + 51
Main I.C. Base Part	LTC3351
Design Author	Linear Technology
Date Created By Author	2017-10
Date Added To Library	2019-07