If you want to do some more design work (and get a more stable / power efficient solution than the cap dropper), or look how simple phone chargers work, take a look at the site of Power Integrations. They provide the switching IC's that do the conversion in -for example- phone chargers. This reference design might do what you want!
If you want to do some more design work (and get a more stable / power efficient solution than the cap dropper), or look how simple phone chargers work, take a look at the site of Power Integrations. They provide the switching IC's that do the conversion in -for example- phone chargers. This reference design might do what you want!
