BD9285F Datasheet, PDF (4/39 Pages) Rohm – Boost 1channel white LED driver For large LCDs

BD9285F
Datasheet
●1.2 Electrical character (Unless otherwise specified Ta=25℃，VCC=12V)
Limit
Parameter
Symbol
Min. Typ. Max. Unit
【LED protection block】
LED OCP detect voltage
VLEDOCP
3.8
4.0
4.2
V
LED OPEN detect voltage
【Analog dimming block】
VOPEN
0.05
0.10 0.15
V
ADIM_P pin HIGH voltage
ADIM_PH
2.0
-
3.8
V
ADIM_P pin LOW voltage
ADIM_PL
-0.3
-
0.8
V
ADIM_P pin input mask
voltage
ADIM_PPU
4.2
-
5.6
V
ADIM_P pin pull-down
resistance
RADIM_P
130
200
300
kΩ
ADIM pin output voltage H
ADIMH
3.201 3.30 3.399
V
ADIM pin output voltage L
ADIML
-
0.0
0.05
V
ADIM pin output resistance
ADIMR
6.6
10
15
kΩ
ADIM pin leak current
ILADIM
-2
0
2
μA
ISENSE pin leak current
IL_ISENSE
-2
0
2
μA
【Dimming signal output block】
DIMOUT
source
on-resistance
RONSO
6.0
12.0 24.0
Ω
DIMOUT sink on-resistance
【TC54 block】
RONSI
1.7
3.5
7.0
Ω
TC54 output voltage
VTC54
5.2
5.4
5.6
V
TC54 available current
|ITC54|
100
-
-
μA
TC54_UVLO detect voltage
TC54_TH
2.232
2.4 2.568
V
TC54_UVLO hysteresis
TC54_HYS
50
100
200
mV
TC54 discharge current
【STB block】
TC54_DIS
5
10
15
μA
STB pin HIGH voltage
STBH
2.2
-
19
V
STB pin LOW voltage
STBL
-0.3
-
0.8
V
STB pin input current
【PWM block】
ISTB
2.0
3.0
4.5
μA
PWMｘ pin HIGH Voltage
PWM_H
2.0
-
5.0
V
PWMｘ pin LOW Voltage
PWM ｘ pin Pull Down
resistance
PWM_L
RPWM
【FAIL block (OPEN DRAIN)】
-0.3
-
0.8
V
130
200
300
kΩ
FAILB pin on-resistance
RFAIL
0.75
1.5
3.0
kΩ
FAILB pin leak current
ILFAIL
-2
0
2
μA
Condition
VISENSE=SWEEP UP
VISENSE=SWEEP DOWN
VADIM_P=3.0V
ADIM_P=3.3V
ADIM_P=0.0V
VADIM=4V, ADIM_P=5.0V
VISENSE=4V
ION=-10mA
ION=10mA
IO=0mA
VSTB=H, TC54=SWEEP DOWN
VSTB=H->L, TC54=SWEEP UP
VSTB=H->L, TC54=4V
VSTB=SWEEP UP
VSTB=SWEEP DOWN
VSTB=3.0V
VPWMｘ=SWEEP UP
VPWMｘ=SWEEP DOWN
VPWMｘ=3.0V
VFAIL=1.0V
VFAIL=15V
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TSZ22111・15・001
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TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001