BD9470AEFV Datasheet, PDF (2/39 Pages) Rohm – White LED driver for medium sized and large sized LCD back light

BD9470AFM・BD9470AEFV
1. Specification for BD9470AEFV・BD9470AFM
●Absolute Maximum Ratings (Ta=25°C)
Parameter
Symbol
Rating
unit
OVP Detect Voltage (DCDC Stop)
VCC
-0.3~36
V
LED1~6 pin voltage
STB・FAIL・UVLO・OVP pin voltage
LED1~6
STB,FAIL,UVLO,OVP
-0.3~40
V
-0.3~36
V
ISET・FB・SS・
CS・N・REG58・RT pin voltage
ISET・FB・SS・CS・N・REG58・RT
-0.3~7
V
PWM1~6・LSP
PWM1~6・LSP
-0.3~16
Power dissipation (HSOP-M28)*1
Pd
5208
mW
Power dissipation (HTSSOP-B28)*2
Pd
Operating temperature range
Topr
Storage temperature range
Tstg
Maximum junction temperature
Tjmax
*1 _{Decreases -41.7mW/°C at Ta=25°C or higher (When mounting a four-layer 70.0mmx70.0mmx1.6mm board)}
*2 _{Decreases -37.6mW/°C at Ta=25°C or higher (When mounting a four-layer 70.0mmx70.0mmx1.6mm board)}
4700
-40～+85
-55～+150
+150
mW
℃
℃
℃
●Recommended Operating Ratings
Parameter
Symbol
Rating
unit
Supply voltage
VCC
9.0 ～ 35.0
V
LED1-4 pin minimum output current
ILED_MIN
40
mA*1
LED1-4 pin maximum output current
LSP input voltage range
DC/DC oscillation frequency
ILED_MAX
VLSP
fsw
250
0.3～2.5
100 ～ 500
mA*1*2*3
V
kHz
Min. on-duty for PWM light modulation
PWM_MIN
30
μS
*1 The amount of current per channel
*2 If LED makes significant variations in its reference voltage Vf, the driver will increase power dissipation, resulting in a rise in package
temperature. To avoid this problem, design the board with thorough consideration given to heat radiation measures.
*3 The LED current can be set up to 250mA
● Pin Configuration ( TOP VIEW )
ISET
1
PWM1
2
PWM2
3
PWM3
4
PWM4
5
PWM5
6
PWM6
7
28
SS
27
FB
26
RT
25
DCDC_GND
24
N
23
CS
22
REG58
●Outline Dimension Diagrams/Sign Diagrams
LOT No.
BD9470AFM
GND
8
FAIL
9
OVP
10
LED6
11
LED5
12
LED4
13
LED_GND
14
21
VCC
20
STB
19
LSP
18
UVLO
17
LED1
16
LED2
15
LED3
1. REG58
2.CS
3.N
4.DCDC_GND
5.RT
6. FB
7.SS
8.ISET
9.PWM1
10.PWM2
11.PWM3
12.PWM4
13.PWM5
14.PWM6
28.VCC
27.STB
26.LSP
25.UVLO
24.LED1
23.LED2
22.LED3
21.LED_GND
20.LED4
19.LED5
18.LED6
17.OVP
16.FAIL
15.GND
Figure 4. Pin Configuration（TOP VIEW）
LOT No.
BD9470AEFV
Figure 5. Outline Dimension Diagrams/Sign Diagrams
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TSZ22111・15・001
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TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003