BD9486F View Datasheet(PDF) - ROHM Semiconductor

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BD9486F

1ch Boost up type White LED Driver for large LCD

ROHM Semiconductor 

BD9486F

3.5.5 OVP Detection

Datasheet

Figure 36. OVP Detection

(*1)…As OVP is detected, the output GATE=L, DIMOUT=L, and the abnormal counter starts.

(*2)…If OVP is released within 4 clocks of abnormal counter of the GATE pin frequency, the boost operation restarts.

(*3)…As the OVP is detected again, the boost operation is stopped.

(*4)…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)…The STB=L input can make IC reset.

(*7)…It normally starts as STB turns Low to High.

(*8)…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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