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| BD9285F Datasheet, PDF (29/39 Pages) Rohm – Boost 1channel white LED driver For large LCDs | |||
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BD9285F
3.7.4 the soft start function
Datasheet
(*1)â¦The SS pin charge does not start by just STB=H. âPWM1=H and PWM2=Hâ is required to start the soft start. In the low SS
voltage, the GATE pin duty is depend on the SS voltage. And as the SS is less than 1.1V, the pulse does not output.
(*2)â¦By the low STB=L, the SS pin is discharged immediately.
(*3)â¦As the STB recovered to STB=H, The SS charge starts immediately by the logic âPWM1 and PWM2=Hâ in this chart.
(*4)â¦The SS pin is discharged immediately by the UVLO=L.
(*5)â¦The SS pin is discharged immediately by the VCCUVLO=L
(*6)â¦The SS pin is discharged immediately by the TC54UVLO=L
(*7)â¦The SS pin is not discharged by the abnormal detection of the latch off type such as OVP until the latch off
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TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001
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