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

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Support Documents & Media

DC2464A - User Guide LTC3351 - Datasheet DC2464A - Design Files DC2464A-B - Schematics

Media

DC2464A - Schematic DC2464A - Board DC2464A - Chart DC2464A - Set Up DC2464A - Switchover