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| BD9483F Datasheet, PDF (23/32 Pages) Rohm – White LED Driver for large LCD Panels (DCDC Converter type) | |||
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BD9483F,FV
â3.7.4 the OVP detection
Datasheet
Figure 36.
(*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 clock 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. Both channels will be
stopped. (GATE1=GATE2=L, DIMOUT1=DIMOUT2=L)
(*5)â¦As the 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 L to H.
(*8)â¦The operation of the OVP detection is not related to the logic of PWM.
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TSZ02201-0F1F0C100100-1-2
28.Nov.2013 Rev.003
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