| 发明名称 | Method and apparatus for digital control of a switching regulator | ||
| 摘要 | An on/off controller device includes a control circuit to generate a control signal to switch a power switch between an on state and an off state to transfer energy from a primary side to a secondary side of a switched mode power supply. A comparator is coupled to generate an enable signal that enables and disables the switching of the power switch by the control circuit. The comparator compares a feedback signal with a variable threshold and switches the enable signal between enabling and disabling the switching of the power switch. The variable threshold is modulated to increase a fundamental frequency of the switching of the power switch by the control circuit. The variable threshold is modulated with a fixed amplitude pulse that is combined with a second threshold to modulate the variable threshold between a first higher value and a second lower value. | ||
| 申请公布号 | US9484824(B2) | 申请公布日期 | 2016.11.01 |
| 申请号 | US201414155127 | 申请日期 | 2014.01.14 |
| 申请人 | Power Integrations, Inc. | 发明人 | Djenguerian Alex B.;Morrish Andrew J.;Odell Arthur B.;Wong Kent |
| 分类号 | H02M3/335;H02M1/00 | 主分类号 | H02M3/335 |
| 代理机构 | Blakely Sokoloff Taylor & Zafman LLP | 代理人 | Blakely Sokoloff Taylor & Zafman LLP |
| 主权项 | 1. An on/off controller device for a switched mode power supply, the on/off controller device comprising: a control circuit to generate a control signal to switch a power switch between an on state and an off state and thereby transfer energy from a primary side to a secondary side of the switched mode power supply; and a comparator coupled to generate an enable signal that enables and disables the switching of the power switch by the control circuit, the comparator to compare a feedback signal that is representative of an output level of the switched mode power supply with a variable threshold and switch the enable signal between enabling and disabling the switching of the power switch in response to the feedback signal crossing the variable threshold, wherein the variable threshold is modulated to increase a fundamental frequency of the switching of the power switch by the control circuit, wherein the variable threshold is modulated with a fixed amplitude pulse that is combined with a second threshold to modulate the variable threshold between a first higher value and a second lower value. | ||
| 地址 | San Jose CA US | ||