Hello,
I'm wanting to design and build a circuit for the purpose of using a 48v LiFePO4 battery to charge USB devices.
This device will have an input side where I connect the 48-55v battery and an output side consisting of 3, 5v USB A ports and 1, 5v USB C port
The output amperage should never exceed 1A per port.
I do not have to worry about a battery cut off provision since the battery has it's own BMS which will stop the flow of current below a per-determined voltage. It would be "fun" to incorporate a means of visually displaying the total current being consumed by all 4 ports combined, but that is a luxury and not a requirement.
I'm considering the use of an LM2575 as it seems to have some of the basic required functions built in.
One problem is that the LM2575 is rated for a maximum of 40v and my battery can reach 55v at full charge so I will need to do some pre-processing to ensure the voltage reaches the LM2575 at or below 40v, preferably around 35v
If you can give me some pointers, tips or suggestions towards this goal it would be appreciated.
Best Regards
I'm wanting to design and build a circuit for the purpose of using a 48v LiFePO4 battery to charge USB devices.
This device will have an input side where I connect the 48-55v battery and an output side consisting of 3, 5v USB A ports and 1, 5v USB C port
The output amperage should never exceed 1A per port.
I do not have to worry about a battery cut off provision since the battery has it's own BMS which will stop the flow of current below a per-determined voltage. It would be "fun" to incorporate a means of visually displaying the total current being consumed by all 4 ports combined, but that is a luxury and not a requirement.
I'm considering the use of an LM2575 as it seems to have some of the basic required functions built in.
One problem is that the LM2575 is rated for a maximum of 40v and my battery can reach 55v at full charge so I will need to do some pre-processing to ensure the voltage reaches the LM2575 at or below 40v, preferably around 35v
If you can give me some pointers, tips or suggestions towards this goal it would be appreciated.
Best Regards