BD9420F Datasheet, PDF (2/31 Pages) Rohm – White LED Driver for large LCD Panels (DCDC Converter Type)

BD9420F
Datasheet
Absolute Maximum Ratings(Ta = 25°C)
Parameter
Symbol
Rating
Unit
Supply Voltage
VCC
-0.3 to +36
V
STB,OVP Voltage
STB,OVP
-0.3 to +36
V
BS1-6 Voltage
BS1-6
-0.3 to +60
V
CS,CL1-6,FB,RT,LSP Voltage
CS,CL1-6,FB,RT,LSP
-0.3 to +7
V
REG75,N Voltage
REG75,N
-0.3 to +14
V
PWMA-C,SEL,VREF Voltage
Power Dissipation for SOP28
PWMA-C,SEL,VREF
-0.3 to +20
V
Pd
0.75 ^{(Note 1)}
W
Operating Temperature Range
Topr
-40 to +85
°C
Storage Temperature Range
Tstg
-55 to +150
°C
Maximum Junction Temperature
Tjmax
150
°C
(Note 1) Derating in done 6.0 mW/°C for operating above Ta≧25°C (Mount on 1-layer 70.0mm x 70.0mm x 1.6mm board)
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions(Ta= -40°C to +85°C)
Parameter
Symbol Min
Typ Max Unit
Supply Voltage
VCC
9
24
35
V
DC/DC Oscillation Frequency
FSW
100
-
800 kHz
Analog Dimming Setting Input Range VREF
0.6
0.9
3.0
V
LSP Setting Input Range
VLSP
0.3
-
2.5
V
Pin Configuration
(TOP VIEW)
Marking Diagram and Physical Dimension
SOP28
Figure 3. Pin Configuration
BD9420F
1PIN MARK
LOT No.
Figure 4. Physical Dimension
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31.Jan.2014 Rev.002