BD9470AEFV Datasheet, PDF (5/39 Pages) Rohm – White LED driver for medium sized and large sized LCD back light

BD9470AFM・BD9470AEFV
●Electrical Characteristics (unless otherwise specified, Ta = 25°C, VCC=24V)
Parameter
Symbol
Specification
unit
Min Typ
Max
【LED Driver Block】
LEDｘ pin current accuracy1
⊿ILED1
-2
-
2
%
LEDｘ pin current accuracy2
⊿ILED2
-2.5
-
2.5
%
LEDｘ pin leakage current
⊿ILED3
-3.5
3.5
%
ISET pin voltage
ILLED
-0.8
-
0.8
uA
LEDｘ pin current accuracy1
VISET
1.3
1.5
1.7
V
【LED protection Block】
ISET short circuit protection range
ISET_DET
-0.3
- VISET×90% V
LEDｘSHORT protection voltage
LSP pin resistive divider(Higher
R)
LSP pin resistive divider(Lower R)
VLSP
RULSP
RDLSP
8.5
9
9.5
V
1860 3100
5580
kΩ
540 900
1620
kΩ
LEDｘ OPEN detect voltage
VOPEN
0.15 0.20
0.25
V
【REG58 BLock】
REG58 output voltage 1
REG58_1
5.742 5.8
5.858
V
REG58 output voltage 2
REG58_2
5.713 5.8
5.887
V
REG58 max output current
| IREG58 |
15
－
-
mA
REG58_UVLOdetect voltage
REG58_TH
2.1
2.4
2.7
V
REG58_UVLO Hysteresis
REG58_HYS
100 200
400
mV
REG58 Discharge current
REG58_DIS
3.0
5.0
7.0
uA
【STB Block】
STB pin HIGH voltage
STBH
2
-
35
V
STB pin LOW voltage
STBL
-0.3
-
0.8
V
STB pin Pull Down resistance
RSTB
600 1000
1800
kΩ
【PWM Block】
PWMｘ pin HIGH voltage
PWM_H
1.5
-
15
V
PWMｘ pin LOW voltage
PWM_L
-0.3
-
0.8
V
PWMｘ pin Pull Down resistance
RPWM
1200 2000
3600
kΩ
【FAIL Block（OPEN DRAIN）】
FAIL Pin Ron
RFAIL
250 500
1000
Ω
FAIL Pin Leakage current
ILFAIL
-2
0
2
μA
Condition
ILED=130mA
ILED=150mA
ILED=250mA
STB=H,
LEDx=40V
RISET=30kΩ
PWMx=L,
ISET=SWEEP DOWN
LEDx=SWEEPUP,
LSP=OPEN
LSP=0V
LSP=4V
LEDx=SWEEP DOWN
IO=0mA
IO=-15mA
STB=ON
REG58=SWEEP DOWN
STB=ON->OFF
REG58=SWEEP DOWN
STB=ON->OFF REG58=4V
STB=SWEEP UP
STB=SWEEP DOWN
VSTB=3.0V
PWMｘ=SWEEP UP
PWMｘ=SWEEP DOWN
PWMｘ=3.0V
VFAIL=1.0V
VFAIL=5V
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TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003