Invention Grant
US08476882B2 Reference voltage based equivalent series resistance (ESR) emulation for constant on-time (COT) control of buck regulators
有权
基于参考电压的等效串联电阻（ESR）仿真，用于降压稳压器的恒定导通（COT）控制
- Patent Title: Reference voltage based equivalent series resistance (ESR) emulation for constant on-time (COT) control of buck regulators
- Patent Title (中): 基于参考电压的等效串联电阻（ESR）仿真，用于降压稳压器的恒定导通（COT）控制
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Application No.: US12895555Application Date: 2010-09-30
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Publication No.: US08476882B2Publication Date: 2013-07-02
- Inventor: Jia Luo , Jon Cronk , Chuong Nguyen
- Applicant: Jia Luo , Jon Cronk , Chuong Nguyen
- Applicant Address: US CA Fremont
- Assignee: Exar Corporation
- Current Assignee: Exar Corporation
- Current Assignee Address: US CA Fremont
- Main IPC: G05F1/40
- IPC: G05F1/40
Abstract:
The present invention uses a reference voltage that varies within a Pulse Width Modulation (PWM) cycle to generate the PWM signal. This allows for stability in the feedback of Constant On-Time (COT) control for buck controllers when low Equivalent Series Resistance (ESR) capacitors are used as the output capacitor. The reference voltage is adjusted using features of a PWM cycle in a voltage mode without using external inductor current information.
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