BD9285F ROHM [Rohm], BD9285F Datasheet - Page 33

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

3.7.8 LED OCP detection
(*1)…If ISENSE>4.0V, LEDOCP is detected, it becomes GATE=L. To detect LEDOCP continuously, The DIMOUT is
(*2)…When the LEDOCP releases within the GATE frequency 4096 counts of the CP counter, the boost operation restarts.
(*3) …As the LEDOCP is detected again, the boost operation is stopped, too.
(*4)…If the LEDOCP detection continues up to 4096 count with the CP counter, IC will be latched off.
(*5)…Once IC is latched off, the boost operation doesn't restart even if the LEDOCP releases.
(*6)…The latch off state can be reset by the STB=L. In this chart, DIMOUT asserts high by the discharge function in the
(*7)…It normally starts by STB=L to H.
(*8)…The operation of the LEDOCP detection is not related to the logic of the PWM.
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TSZ22111・15・001
BD9285F
compulsorily high, regardless of the PWM dimming signal.
paragraph 3.7.3.
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TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001
Datasheet