Reference Design Library > Energy Harvesting > Solar Battery Chargers > DC1584A(#2): 1Cell, Li-Ion/Polymer, 50mA, 4 ~ 4.2V

DC1584A(#2): 1Cell, Li-Ion/Polymer, 50mA, 4 ~ 4.2V

Summary

The LTC®4070 allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent or continuous charging sources. The 450nA to 50mA operating current makes charging possible from previously unusable sources. With the addition of an external pass device, shunt current may be boosted to 500mA. Stacked cell high voltage battery packs are inherently balanced with shunt charging.

With its low operating current, the LTC4070 is well suited to charge thin film batteries in energy harvesting applications where charging sources may be intermittent or very low power. The unique architecture of the LTC4070 allows for an extremely simple battery charger solution; requiring just one external resistor.

The LTC4070 offers a pin selectable float voltage with 1% accuracy across the full range of operating temperature and shunt current. The integrated thermal battery qualifier extends battery lifetime and improves reliability by automatically reducing the battery float voltage at NTC thermistor temperatures above 40°C. The LTC4070 also provides both low and high battery status outputs. For applications requiring pack protection, see LTC4071.

Specifications

Manufacturer Analog Devices Inc.
Category Energy Harvesting
Sub-Category Solar Battery Chargers
Eval Board Part Number DC1584A-ND
Eval Board Supplier Analog Devices Inc.
Eval Board Normally In Stock
Application / Target Market Automotive
Energy Harvesting
Memory Back-up
Solar Powered Back-up
Voltage In 10 ~ 16 V
Cell Type Lithium Ion, Li-Ion
Lithium Polymer, Li-Pol
Thin Film
Voltage Out 4, 4.1, or 4.2 V
Current Out 50 mA
Features Low Battery Warning
Thermal Protection
Component Count + Extras 10 + 28
Design Author Linear Technology
Main I.C. Base Part LTC4070
Input Power
Current In
Battery Capacity
Date Created By Author
Date Added To Library 2011-12

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Support Documents & Media

DC1584A - User Guide LTC4070 - Datasheet

Media

DC1584A_Schematic_Full.JPG DC1584A_Board_Full.JPG