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| BD9486F Datasheet, PDF (25/37 Pages) Rohm – 1ch Boost up type White LED Driver for large LCD | |||
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BD9486F
3.5.3 Turn Off
Datasheet
STB
PWM
REG50
2.3V
REG50UVLO
DIMOUT
GATE
Vout
SS
RT 2.0V
STATE
ON
Dischange
OFF
(*1)
(*2)
Figure 34. Turn Off
(*1)â¦As STB=HâLãboost operation stops and REG50 starts to discharge.
(*2)â¦While STB=L, REG50UVLO=H, DIMOUT becomes same as PWM. REG50=5.0V is discharged by -5μA until
REG50=2.3V,and then IC becomes OFF state. REG50 is discharged rapidly and RT becomes 0V at the same time. VOUT is
discharged completely until this time. It should be set to avoid a sudden brightness.
About capacitance value setting of REG50, please refer to the section 3.2.2.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0F1F0C100240-1-2
13.Feb.2014 Rev.004
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