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| BD9285F Datasheet, PDF (28/39 Pages) Rohm – Boost 1channel white LED driver For large LCDs | |||
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BD9285F
3.7.3 turn off
Datasheet
STB
PWM1
andPWM2
TC54
2.4V
V5UVLO
DIMOUT
GATE
Vout
SS
ON
Dischange
OFF
(*1)
(*2)
(*1)â¦As STB pin turns High to Low, BD9285F stops the boost operation, starts the discharge of TC54.
(*2)â¦During STB=L and V5UVLO=H, the DIMOUT asserts the same logic of PWM. TC54=5.4V is discharged until 2.4V by the
constant current 10uA. And IC turns off. Vout need to be discharged adequately so that LED does not turns on drastically
at the next start up.
For detailed instructions, please refer the section 3.4.2 âhow to shutdown and set TC54 capacitanceâ
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111ã»15ã»001
28/36
TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001
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