I want to build a lithium ion battery charger with tp4056 module but most of my power supply's voltage is 12-19 V
Datasheet says input voltage is 4.5-5.5v and current 1A
Can I connect 1-3 tp4056 module in series ?
I think it won't work because voltage drop not constant ( depends on how much module consume )
I thought to use l7805 or lm317 but 1A is seemed too much for them
Right now I'm thinking about using pwm circuit with MOSFET but If anyone have better idea , I want to hear it Also if I make pwm circuit to convert 19V (4A) to 5v , output current stays same or could it be 12A ?
Thanks for helping