The circuit described here is a 12-V dc to 5-V dc (±5%) switched-mode power supply (SMPS). The supply uses a 12-V input from an array of four 3-V dc, 40-mA solar cells connected in series.

SMPS circuits offer an efficient way to reduce AC from a mains source to any desired level for powering low-voltage circuits, though this comes at the cost of components such as control ICs, switching ...

SMPS circuits are more often used to provide a positive output voltage. This paper explains that negative power supplies are preferred when AC switches such as snubberless Triacs, ACS and ACST devices ...

Designed for ac/dc synchronous rectification and ORing circuits, a range of 75V and 100V HEXFET MOSFETs promise to improve efficiency and power density in laptop/LCD adaptor and server SMPS ...