POWER SUPPLY CONTROL DEVICE

摘要

An electronic device is for controlling multiple switching power circuits in a power supply system. Each switching power circuit (131,132, 133) has a power clock for controlling switching of a supply side switch (111, 112, 113) that enables charging. The device (100) has respective power clock delay units (121, 122, 123). Each respective power clock delay unit (123) provides a respective power clock (143) at a predetermined delay based on a respective input clock. The respective predetermined delays are chosen so that said switching of respective different supply side switches occurs at respective different points in time. Advantageously the conducted emission in high frequency (RF) bands is reduced.