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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 Linear Technology/Analog Devices
Category Power Management
Sub-Category Capacitor Chargers
Eval Board Part Number DC1220B-ND
Eval Board Supplier Linear Technology/Analog Devices
Function Charger Controller
Number of Capacitors 2
Input Voltage 2.9 ~ 5.5 V
Topology Charge Pump
Output Voltage (Max) 5.3 V
Charge Current (Max) 150 mA
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
Date Created By Author 2008-07
Date Added To Library 2019-05

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