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ROHM Semiconductor |
STRUCTURE
PRODUCT
TYPE
FEATURE
Silicon Monolithic Integrated Circuit
White LED Driver for LCD Backlights
BD9204F
・ Input voltage range 7V-15V
・ Built-in 3ch boost DCDC converter (current mode)
・ OVP, SCP, OPEN protection
・ Analog dimming, PWM dimming enable
・ Under voltage lock out (UVLO)
・ Fail pin annotate abnormal state
・ SOP28 package
○ ABSOLUTE MAXIMUM RATINGS (Ta=25℃)
PARAMETER
Symbol
Power Supply Voltage
Vccmax
Power Dissipation
Operating Temperature Range
Pd
Topr
Storage Temperature Range
Tstg
*1 Pd derated at 6.0 mW/℃ for temperature above Ta=25℃,
mounted on 70mm×70mm×1.6mm 1 layer(cupper area 70mm×70mm)glass-epoxy PCB.
This product is not designed for protection against radioactive rays.
Limit
20
750 *1
-40~+85
-55~+150
Unit
V
mW
℃
℃
○ OPERATING CONDITIONS (Ta=25℃)
PARAMETER
Power Supply Voltage
Symbol
VCC
Limit
7~15
Unit
V
1/4
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REV. A
○ELECTRICAL CHARACTERISTICS(unless otherwise specified VCC=12V, Ta=25℃)
PARAMETER
Symbol
Limit
MIN.
TYP.
MAX.
【Total Current Consumption】
Circuit Current
ICC
- 4.7
-
Standby Current
IST - 0 10
【VREG】
VREG Output Voltage
VREG
4.8 5.0 5.2
VREG input current
IREG
2.16 3.6 5.04
【Boost Driving Pin】
N1, N2, N3 resistance1
RONH
- 4.0 -
N1, N2, N3 resistance2
【Error-Amp block】
RONL
- 2.0 -
ILED threshold voltage
VFB
(-2%) 1.5 (+2%)
COMP1,2,3 sink current
ICOMPSI
- 100 -
COMP1,2,3 source current
【CT Oscillator block】
ICOMPSO - 100 -
Oscillation Frequency
FRT 270 300 330
【SOFT START】
SS source current
ISS - 1.0 -
SS END pin voltage
【OVP and SCP detection】
VSS
- 5.0 -
Over Voltage Protection voltage
VOVP
1.65 2.0 2.35
OVP hysteresis
VOVPHYS - 0.05 -
Short Circuit Protection voltage
VSCP
0.05 0.20 0.35
SCP hysteresis
【Fail pin】
VSCPHYS - 0.05 -
Low level voltage (normal state)
VFAIL
- 0.2 0.5
Leak current (abnormal state)
ILFAIL
- -2
CP pin charge current
ICP - 1 -
CP detect voltage
【SEL pin】
VCP
- 2.0 -
Input Low voltage
VSELL
-0.3 -
0.8
Input Middle voltage
VSELM 1.6 - 3.0
Input High voltage
【STB pin】
VSELH 4.2 -
-
Input Low voltage
VSTBYL
-0.3
-
0.8
Input High voltage
【PWM pin】
VSTBYH
2.0
-
-
Input Low voltage
VPWML
-0.3
-
1.2
Input High voltage
VPWMH
3.0
-
-
(This product is not designed for protection against radioactive rays.)
2/4
UNIT
Conditions
mA STB=H, SEL=L, PWM=L
uA STB=L
V IO=0mA, CREG=1uF
VREG=5.25V
mA (input externally)
STB=H, SEL=L, PWM=L
Ω
ION=-10mA Between output N
and internal power supply
Ω ION=10mA
V VREF=1.5V
uA VLED=2.0V
uA VLED=1.0V
kHz RT=160kΩ
uA
V
V Sweep up
V Sweep down
V Sweep down
V Sweep up
V IOFAIL=1mA
uA VOFAIL=4V
uA VCP=0V
V
V CH1,CH2,CH3=enable
V CH1,CH2,=enable
V CH1=enable
V
V
V
V
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REV. A
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