Invention Grant
US07274246B2 Switching circuit using multiple common-drain JFETs for good heat dissipation capability and small PCB layout area
有权
使用多个公共漏极JFET的开关电路具有良好的散热能力和较小的PCB布局面积
- Patent Title: Switching circuit using multiple common-drain JFETs for good heat dissipation capability and small PCB layout area
- Patent Title (中): 使用多个公共漏极JFET的开关电路具有良好的散热能力和较小的PCB布局面积
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Application No.: US11159245Application Date: 2005-06-23
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Publication No.: US07274246B2Publication Date: 2007-09-25
- Inventor: Liang-Pin Tai , Jiun-Chiang Chen
- Applicant: Liang-Pin Tai , Jiun-Chiang Chen
- Applicant Address: TW Hsinchu
- Assignee: Richtek Technology Corp.
- Current Assignee: Richtek Technology Corp.
- Current Assignee Address: TW Hsinchu
- Agency: Rosenberg, Klein & Lee
- Priority: TW93118350A 20040624
- Main IPC: H03K17/687
- IPC: H03K17/687
Abstract:
A switching circuit uses multiple common-drain JFETs to serve as the low-side switches of the switching circuit, and each of the low-side JFET is coupled between a high-side switch and a power node. Since a JFET can endure high voltage at both drain side and source side, and has good heat dissipation capability at drain side, the drain of the low-side JFET is coupled to the power node to enhance the heat dissipation capability and accordingly, all the low-side JFETs are allowed to be packaged in a same package to reduce the PCB layout area.
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