| 摘要 |
A switching power source apparatus includes a high-side MOSFET 11 connected to an input voltage Vin, a ramp signal generator 18 to generate a ramp signal in synchronization with a switching frequency of the high-side MOSFET 11, an amplitude signal generator (second feedback controller 2) to generate an amplitude signal Comp corresponding to an amplitude of the ramp signal, and a controller 1 to control ON timing of the high-side MOSFET 11 according to the ramp signal, a feedback signal FB corresponding to an output voltage Vout, and a first reference voltage REF, as well as controlling an ON width of the high-side MOSFET 11 according to the amplitude signal Comp, the input voltage Vin, and the output voltage Vout. |
