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| BD9486F Datasheet, PDF (27/37 Pages) Rohm – 1ch Boost up type White LED Driver for large LCD | |||
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BD9486F
3.5.5 OVP Detection
Datasheet
Figure 36. OVP Detection
(*1)â¦As OVP is detected, the output GATE=L, DIMOUT=L, and the abnormal counter starts.
(*2)â¦If OVP is released within 4 clocks of abnormal counter of the GATE pin frequency, the boost operation restarts.
(*3)â¦As the OVP is detected again, the boost operation is stopped.
(*4)â¦As the OVP detection continues up to 4 count by the abnormal counter, IC will be latched off.
(*5)⦠Once IC is latched off, the boost operation doesn't restart even if OVP is released.
(*6)â¦The STB=L input can make IC reset.
(*7)â¦It normally starts as STB turns Low to High.
(*8)â¦The operation of the OVP detection is not related to the logic of PWM.
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TSZ02201-0F1F0C100240-1-2
13.Feb.2014 Rev.004
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