Invention Grant
US08482943B2 Power transistor driving circuits and methods for switching mode power supplies
有权
功率晶体管驱动电路和开关模式电源的方法
- Patent Title: Power transistor driving circuits and methods for switching mode power supplies
- Patent Title (中): 功率晶体管驱动电路和开关模式电源的方法
-
Application No.: US12638809Application Date: 2009-12-15
-
Publication No.: US08482943B2Publication Date: 2013-07-09
- Inventor: Jianhua Duan , Qiang Zong , Yajiang Zhu
- Applicant: Jianhua Duan , Qiang Zong , Yajiang Zhu
- Applicant Address: KY Grand Cayman
- Assignee: BCD Semiconductor Manufacturing Limited
- Current Assignee: BCD Semiconductor Manufacturing Limited
- Current Assignee Address: KY Grand Cayman
- Agency: Kilpatrick Townsend & Stockton LLP
- Priority: CN200910226104 20091120
- Main IPC: H02M1/12
- IPC: H02M1/12 ; H02M3/335
Abstract:
A power supply controller is provided for providing a drive current to a control terminal of a power transistor in three time intervals. The controller includes control circuits configured to control the drive current in multiple stages. During a first time interval, first drive current includes a current spike for turning on the power transistor in response to a start of the control signal pulse. During a second time interval, a second drive current includes a ramping current substantially proportional to a magnitude of a current through the power transistor. During a third time interval, current flow to the power transistor is at least partially turned off before an end of the control signal pulse.
Public/Granted literature
- US20110122659A1 POWER TRANSISTOR DRIVING CIRCUITS AND METHODS FOR SWITCHING MODE POWER SUPPLIES Public/Granted day:2011-05-26
Information query
