System and method for a high-side power switch
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United States of America Patent
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May 8, 2018
Issued Date -
N/A
app pub date -
Mar 31, 2016
filing date -
Mar 31, 2016
priority date (Note) -
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Abstract
A system and method for a high-side power switch includes a gate driver configured to be coupled to a power switch, a voltage measurement circuit configured to be coupled directly to the power switch, a switch monitoring circuit configured to be coupled to the power switch, the switch monitoring circuit configured to measure an output current of the power switch, a current limitation circuit coupled to the gate driver and the switch monitoring circuit, the current limitation circuit configured to regulate gate-source voltage of the gate driver when the output current exceeds a threshold value, and a controller coupled to the current limitation circuit and the voltage measurement circuit, the controller configured to determine a mode of operation according to a startup voltage measured by the voltage measurement circuit during a startup sequence, the controller further configured to provide the threshold value to the current limitation circuit according to the mode of operation and a switch voltage measured by the voltage measurement circuit.
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