Fish & Richardson P.C.
Light-emitting-load driving device and illumination-light source device using same
A dimming circuit (A11) incorporated in a light-emitting-load driving device includes a pre-comparator (CMP21) arranged to compare a dimming signal (S20) with a threshold voltage (VthCMP) lower than an input buffer (A113x) of a dimming microcomputer (A113) so as to generate a comparison signal (S20y), and to transmit the comparison signal (S20y) instead of the dimming signal (S20) to the dimming microcomputer (A113).
Rohm Co., Ltd.
H H H H H H H H
H02M H05B H05B H02M H05B H02M H05B H05B
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Akinobu
Sawada