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| BD9483F Datasheet, PDF (24/32 Pages) Rohm – White LED Driver for large LCD Panels (DCDC Converter type) | |||
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BD9483F,FV
â3.7.5 FBMAX detection
Datasheet
Figure 37.
(*2)â¦During the soft start, it is not judged to the abnormal state even if the FB=H(FB>4.0V).
(*3)â¦When the PWM=H and FB=H, the abnormal counter doesnât start immediately.
(*4)â¦The CP charge will start if the PWM=H and the FB=H detection continues 8 clock of the GATE frequency. Once the count
starts, only FB level is monitored.
(*5)â¦When the FBMAX detection continues till the CP charge reaches to 3.0V, IC will be latched off. The latch off interval can
be calculated by the external capacitance of CP pin. (Please refer the section 3.4.7.) In latch off mode, both CH1 and CH2
will be stopped.
(*6)â¦The latch off state can be reset by the STB=L.
(*7)â¦It is normally started by PWM=L to H, in this Figure.
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