Lithium battery charging _5V_3.3V voltage output
Features
Use TP4056 chip to charge 3.7V single cell lithium battery.
Use MST9200BSF to achieve 5V boost of lithium battery. According to the manual, when the input voltage is greater than 3.3V and the output voltage is 5V, the load current can reach 2A.
Using RT9193-33FB to achieve 3.3V step-down output of lithium battery, unlike AMS1117-3.3V, which can output 800mA, he can output a maximum of 300mA, but it is enough to drive a single chip microcomputer and OLED.
Circuit switch introduction
The SW1 switch is the main switch for charging the lithium battery.
SW2 DIP switch is a 5V voltage and 3.3V voltage control switch. When not in use, the voltage output can be turned off.
Introduction to plugins
Four gold fingers are drawn out, and the pin header can be directly soldered horizontally, or the wire can be directly soldered to other circuits.
USB is the charging input port.
Lithium battery charging _5V_3.3V voltage output
*PCBWay community is a shared platform and we are not responsible for any design issues.
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- kapacita ?ubo? May 13,2020
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