BD9285F ROHM [Rohm], BD9285F Datasheet - Page 28

• Manufacturer Part Number: BD9285F
• Description: Boost 1channel white LED driver For large LCDs
• Manufacturer: ROHM [Rohm]

3.7.3 turn off
(*1)…As STB pin turns High to Low, BD9285F stops the boost operation, starts the discharge of TC54.
(*2)…During STB=L and V5UVLO=H, the DIMOUT asserts the same logic of PWM. TC54=5.4V is discharged until 2.4V by the
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
BD9285F
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 “how to shutdown and set TC54 capacitance”
andPWM2
DIMOUT
V5UVLO
PWM1
Vout
GATE
SS
TC54
STB
ON
(*1)
Dischange
(*2)
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2.4V
OFF
TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001
Datasheet