WLED driver and drive control method
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United States of America Patent
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-
Apr 11, 2017
Grant Date -
Aug 25, 2016
app pub date -
May 5, 2016
filing date -
Nov 21, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A WLED driver and a drive control method. The WLED driver includes 2N2 switches, and each CS module includes 2N switches, where one end of each of N switches in the 2N switches is connected to an output end of an error amplifier, another end of each of the N switches is connected to a gate of each of N NMOS transistors, one end of each of remaining N switches is connected to a negative input end of the error amplifier, and another end of each of the remaining N switches is connected to a positive input end of each of N feedback resistors. After a control circuit generates a clock control signal group Φgroup. the control circuit controls switching actions of the 2N2 switches on a time-division basis according to the clock control signal group Φgroup.
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