DC1220B: 5.4V @ 150mA Charge Rate, 2 Cell, Supercapacitor Charger

Summary

DC1220B is a Low Profile Regulated Dual Cell SuperCAP Charger featuring the LTC3225. The LTC3225 is a constant-current SuperCAP charger designed to charge two SuperCAPs in series to a fixed output voltage of 4.8V/5.3V from a 2.9V to 5.5V input supply. Automatic cell balancing is achieved during the charging phase.

Low input noise, low quiescent current and low external parts count make the LTC3225 ideally suited for small, battery-powered applications. Charging current level is programmed through an external resistor. Internal current limit and thermal shutdown circuitry allows the part to survive a continuous short-circuit from PROG to GND.

When the input supply is removed, the LTC3225 automatically enters a low current state, drawing less than 1µA from the SuperCAPs.

Specifications

Manufacturer Analog Devices Inc.
Category Power Management
Sub-Category Capacitor Chargers
Eval Board Part Number DC1220B-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Normally In Stock
Capacitor Type Super Capacitor
Function Charger Controller
Number of Capacitors 2
Voltage In 2.9 ~ 5.5 V
Voltage Out (Max) 5.3 V
Charge Current (Max) 150 mA
Topology Buck-Boost
Features Adjustable Output Current
Adjustable Output Voltage
Automatic Cell Balancing
Power Good Indicator
Short Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Quiescent Current 20 µA
Component Count + Extras 8 + 22
Main I.C. Base Part LTC3225
Design Author Linear Technology
Date Created By Author 2008-07
Date Added To Library 2019-05

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Support Documents & Media

DC1220B - User Guide LTC3225/-1 - Datasheet DC1220B- Design Files

Media

DC1220B - Schematic DC1220B - Chart DC1220B - Set Up DC1220B - Typical Application