![Automotive 12V to 5V USB charger assembled PCB]
This project presents a nominally 12V to 5V step down power adapter for use in a motor vehicle to supply 5V at up to 2A from a USB socket.
It is intended to be plugged into a cigar lighter socket in a car or other vehicle and can be used with any device that is normally charged from a 5V USB power outlet at up to 1.8A.
Although most rec...
This circuit was "reverse engineered" from a cheap 5V USB charger circuit. Voltage regulation is by a zener diode and opto-isolator coupling the primary and secondary. The circuit includes 4 zener diode models from 2.4 to 5.1V
The aim of the project was to explore how SMPSs operate
These are good primers