SWITCHING POWER SUPPLY AND POWER SYSTEM CAPABLE OF OFFERING GOOD LOAD REGULATION PROPERTIES

摘要

PURPOSE: A switching power supply and power system are provided to perform a stable operation when using an output condenser having small electron spin resonance by controlling a ripple of input voltage.;CONSTITUTION: A high side switch(11) is connected to input voltage. A lamp signal generating part(18) creates a lamp signal synchronized in switching frequency of the high side switch. An on-width control signal generating part(24) detect phase difference between a reference signal and a driving signal driving the high side switch. The on-width control signal generating part creates an on-width control signal based on the detected phase difference. A controller(1) controls on-timing of the high side switch based on the lamp signal, a feedback signal and first reference voltage. The controller controls on-width of the high side switch based on the on-width control signal.;COPYRIGHT KIPO 2012