BD9483F Просмотр технического описания (PDF) - ROHM Semiconductor

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BD9483F

White LED Driver for large LCD Panels (DCDC Converter type)

ROHM Semiconductor 

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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TSZ22111・15・001

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TSZ02201-0F1F0C100100-1-2

28.Nov.2013 Rev.003

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