Invention Grant
US07656136B2 Digital voltage converter with constant off-time and variable on-time of controller
失效
数字电压转换器具有恒定的关断时间和可变导通时间的控制器
- Patent Title: Digital voltage converter with constant off-time and variable on-time of controller
- Patent Title (中): 数字电压转换器具有恒定的关断时间和可变导通时间的控制器
-
Application No.: US11826213Application Date: 2007-07-13
-
Publication No.: US07656136B2Publication Date: 2010-02-02
- Inventor: Wei-Hsu Chang
- Applicant: Wei-Hsu Chang
- Applicant Address: TW Hsinchu County
- Assignee: Richtek Technology Corp.
- Current Assignee: Richtek Technology Corp.
- Current Assignee Address: TW Hsinchu County
- Agency: Rosenberg, Klein & Lee
- Priority: TW96117865A 20070518
- Main IPC: G05F1/00
- IPC: G05F1/00 ; G05F1/613
Abstract:
In a digital boost or buck-boost converter, a pulse width modulation signal has an on-time and an off-time. A constant off-time period is provided to set the off-time to be constant, and an on-time period to determine the on-time is derived by monitoring the output voltage of the converter. With the constant off-time, the output voltage and the on-time period will have a linear relation, thereby reducing the output ripple when the converter operates with a high duty-ratio.
Public/Granted literature
- US20080284397A1 Digital voltage converter and control method thereof Public/Granted day:2008-11-20
Information query
IPC分类:
