aerobotics

18650 lithium battery LED light

Overview

Using IP5306 lithium battery charge and discharge chip and PT4115LED constant current driver IC, you can charge and discharge 18650 batteries and make LED lights. Schematic diagram.png Red circle 1 is the IP5306 lithium battery charging and boosting 5V circuit. Short pressing the SW1 switch can trigger the battery percentage indicator light and USB 5V output.

Red circle 2 is the PT4115 constant current LED drive circuit, with a maximum constant current of 800MA. Press and hold SW1 for 3 seconds to control the PT4115 to light up and turn off the LED light. The layout of the PCB board and 18650+LED front.png 18650+LED reverse side.png the PCB of the welded finished product has been modified to enhance the heat dissipation of the LED lamp and the LED will no longer flicker!

Test video: https://v.youku.com/v_show/id_XNDMzNzA1OTk2OA==.html?spm=a2h3j.8428770.3416059.1

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-23 08:40:37

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