High accuracy inductor peak current control scheme for switching power supply

摘要

The invention is composed of peak current generator, peak current detector, peak current error amplifier and compensator, peak current controller and MOSFET driver. The advantage of the invention is to control switching converter's inductor peak current in high accuracy. The invention can automatically compensate error due to inductor current rising slope, the delay times Td, Tp of comparator and driver and comparator's offset voltage. The invention can largely decrease performance requirements of comparator and driver circuit and help to down the cost to implement the system.