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Single cell Li-ion Li-polymer battery charger for GPS tracker


Code : BTG1
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Single cell Li-ion Li-polymer battery charger for GPS tracker


This circuit was designed to charge portables CelloTrack GPS modules of Pointer company.
Is an advanced controller circuit to manage the linear charging of single cell battery
Made in molded potietilene with a USB type A connector in an end, a 2 meters ( 6 feet) wire and a cellotrack connector in the another end.
Have 2 LEDs to show when the circuit is charging.

How work

The device uses a constant current / contant voltage algorithm with a preconditioning and end of charging detection
Also limit the charging current according chips temperature, this thermal regulation optimize the charging cycle.
Configured for 450mA of charging current and 4.20v for end of charging.
Have 2 leds, a blue led show when the system is powered from supply ( many times bad called charger). The another led (Red) show when the circuit is charging.

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