BD9470AEFV Datasheet, PDF (3/39 Pages) Rohm – White LED driver for medium sized and large sized LCD back light

BD9470AFM・BD9470AEFV
Contents
1. Specification for BD9470AEFV・BD9470AFM
●Absolute Maximum Ratings
●Recommended Operating Ratings
●Pin Configuration
●Outline Dimension Diagrams/Sign Diagrams
●Electrical Characteristics
●Pin Numbers, Names, and Functions
●External Component Recommended Range
●Internal Equivalent Circuit Diagrams
●Block Diagram
●Characteristic date
2. Understanding BD9470AEFV・BD9470AFM
●Pin Functions
3. Application of BD9470AEFV・BD9470AFM
3.1 BD9470AEFV, BD9470AFM examination for application
●Start-up and SS capacity setting explanation
●The setting of REG58 capacity and shutdown procedure
●VCC series resistance setting procedure
●The necessity for holding output voltage and FB voltage while PWM=Low
●Explanation of VOUT（OVP） voltage holding function when PWM=Low
●FB current Source mode・Sink/Source mode
●LED Current setting
●DC/DC converter drive frequency setting
●UVLO setting procedure
●OVP/SCP setting method
●LSP setting procedure
●Timer latch function
3.2 Selection of DCDC components
●OCP setting procedure/DCDC component current tolerance selection procedure
●Selection of Inductor L
●Selection of switching MOSFET transistors
●Selection of rectifier diodes
3.3 Timing chart
3.4 List of protection function
4. Caution on use
5. Ordering Information
6. Revision history
P2～P9
P2
P2
P2
P2
P4,P5
P6
P6
P7
P8
P8,P9
P10～P12
P10～P12
P13～P32
P13～P27
P13,P14
P15
P16
P17,P18
P19,P20
P21,P22
P23
P23
P24
P25
P26
P27
P28～P30
P28,P29
P30
P30
P30
P31
P32
P33
P34
P35
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TSZ22111・15・001
3/35
TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003