BXbkCHqP

DC UPS module powered by lithium battery

Overview

Supports up to 2.5A lithium battery charging; without heat dissipation, operation is recommended to be below 20W.
The chip supports up to 18V; since the capacitor I used only has a voltage rating of 16V, if the parameters are the same, 15V or even lower is recommended.
It includes a battery protection chip for overcharge, over-discharge, overcurrent, and overload protection.

Actual test data without heat dissipation: (Currently, I only have a 5A switching power supply on hand, so I cannot test higher power outputs) Input

Voltage (Board End) Input Current Input Power Output Voltage (Board End) Output Current Output Power Efficiency 3.972V 1.73A 6.87W 12.2V 0.5A 6.1W 88.8% 3.832V 3.49A 13.374W 12.2V 1A 12.2W 91.2% 3.891V 4.84A 18.32W 12.2V 1.4A 17.08W 93.2% Testing Tools: Test method for ATZ9712 electronic load, ZT219 multimeter, and ordinary 30V 5A adjustable power supply : The input (output) voltage is measured using an ordinary multimeter, and the current is referenced from the adjustable power supply current display and the electronic load display parameters.

Design Files

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Update:2026-03-27 01:19:52

There are technical parameters, but no solution!! Help
The attached is the technical parameters of the switching power supply. I hope someone can give me some advice. . . [[i] This post was last edited by xclfang on 2011-8-29 15:58 [/i]]
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