Invention Grant
- Patent Title: Waveform current monitor using RDSon of low-side bridge FET
- Patent Title (中): 使用低侧桥式FET的RDSon的波形电流监视器
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Application No.: US12248355Application Date: 2008-10-09
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Publication No.: US07948194B2Publication Date: 2011-05-24
- Inventor: Richard Ralph Garcia
- Applicant: Richard Ralph Garcia
- Applicant Address: US CA Milpitas
- Assignee: Intersil Americas Inc.
- Current Assignee: Intersil Americas Inc.
- Current Assignee Address: US CA Milpitas
- Agency: Howison & Arnott, LLP
- Main IPC: H02P23/00
- IPC: H02P23/00

Abstract:
An apparatus for monitoring current for a motor drive including at least high-side and low-side switching transistors includes a driver circuit for driving a gate of the low-side switching transistor. First circuitry measures a drain to source voltage across the low-side switching transistor and generates a voltage output responsive thereto. Second circuitry has a first state of operation that samples the voltage output of the first circuitry when the low-side switching transistor is turned on and has a second state of operation to sample the voltage output of the first circuitry when the low-side switching transistor is turned off. The second circuitry further generates a monitored output current responsive to the sampled voltage output.
Public/Granted literature
- US20090206785A1 WAVEFORM CURRENT MONITOR USING RDSON OF LOW-SIDE BRIDGE FET Public/Granted day:2009-08-20
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