BD9483F Datasheet, PDF (26/32 Pages) Rohm – White LED Driver for large LCD Panels (DCDC Converter type)

BD9483F,FV
●3.7.7 the spontaneous detection OVP and FBMAX.
STB
OVP
3.0V
2.9V
FB
4.0V
4.0V
Datasheet
3.0V
4.0V
2.9V
4.0V
CP
Abnormal
COUNTOR
SS
GATE
DIMOUT
FAILB
4count
0.4V
4count
STATE NORMAL COUNTOR
Latch off
Reset ^{NORMAL COUNTOR Latch off}
(*1)
(*2)
(*3)
(*4)
Figure 39.
(*1)…As the FBMAX is detected, the CP charge is started.
(*2)…As the OVP is detected, the abnormal counter is started, the CP charge is not reset.
(*3)…IC is latched off by OVP.
(*4)…The latch mode is reset by STB=L
(*5)…If the FBMAX is detected during OVP, the CP charge is started.
(*6)…The OVP counties to 4clk, IC is latched off. And the CP charge is reset.
(*5) (*6)
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