发明申请
US20100007217A1 Minimum loss and wiring circuit and method for paralleling hot swap controllers
有权
最小损耗和布线电路和并联热插拔控制器的方法
- 专利标题: Minimum loss and wiring circuit and method for paralleling hot swap controllers
- 专利标题(中): 最小损耗和布线电路和并联热插拔控制器的方法
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申请号: US12218281申请日: 2008-07-14
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公开(公告)号: US20100007217A1公开(公告)日: 2010-01-14
- 发明人: Gerald W. Steele , Tony R. Larson
- 申请人: Gerald W. Steele , Tony R. Larson
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 主分类号: H01H35/00
- IPC分类号: H01H35/00
摘要:
A hot swap controller includes a shunt resistor (32-1,2) and a power transistor (37-1,2) having a source coupled to a load maintains the first power transistor in a fully-turned-on condition to cause it to deliver a load current contribution (I1,2) which flows through the shunt resistor and the power transistor to the load (25). Current sensing circuitry (35-1,2) produces a first control signal (V45-1,2-V47-1,2) equal to the difference between a DC component (V47-1) proportional to a first load current contribution (IL1) flowing in the first shunt resistor and a feedback-based component (V45-1). A control amplifier (49-1,2) produces a second control signal (V51-1,2) in response to the first control signal to modify a drive signal (53-1) to the power transistor so as to reduce a channel resistance of the power transistor if the first control signal exceeds a predetermined level.