Light emitting element driving device
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United States of America
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Mar 1, 2022
Grant Date -
Mar 11, 2021
app pub date -
Aug 13, 2020
filing date -
Aug 13, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A light emitting element driving device includes, for example, a slope voltage generator generating a slope voltage including information on an inductor current passing through a switching output stage, a sense amplifier generating a sense voltage commensurate with the output current fed to a light-emitting element from the switching output stage, a sense amplifier generating a control voltage commensurate with the difference between the sense voltage and a reference voltage, a comparator comparing the slope voltage with the control voltage to generate a comparison signal, a controller controlling the switching output stage in accordance with the comparison signal, and a clamper limiting the control voltage to equal to or lower than a clamp voltage commensurate with the slope voltage.
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