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BD9470AEFV Datasheet(PDF) 4 Page - Rohm

Part # BD9470AEFV
Description  White LED driver for medium sized and large sized LCD back light
Download  39 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD9470AEFV Datasheet(HTML) 4 Page - Rohm

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BD9470AFM・BD9470AEFV
●Electrical Characteristics (unless otherwise specified, Ta = 25°C, VCC=24V )
Parameter
Symbol
Specification
unit
Condition
Min
Typ
Max
【Whole Device】
Operation Circuit
Icc
5.5
8.5
mA
STB=3V, PWM1-6=3.3V
Standby current
IST
40
80
μA
STB=0V
【UVLO Block】
Operating voltage (VCC)
VUVLO_VCC
6.5
7.5
8.5
V
VCC=SWEEP UP
Hysteresis voltage (VCC)
VUHYS_VCC
150
300
600
mV
VCC=SWEEP DOWN
UVLO release voltage
VUVLO_U
2.88
3.00
3.12
V
VUVLO=SWEEP UP
UVLO hysteresis voltage
VUHYS_U
250
300
350
mV
VUVLO=SWEEP DOWN
UVLO pin leakage current
UVLO_LK
-2
0
2
μA
VUVLO=4V
【DC/DC Block】
Error
amp.
Reference
voltage
(Min)
VLED
0.36
0.40
0.44
V
LEDx
Terminal
ILEDx
=
40mA
Error
amp.
basic
voltage
(ILED=130mA)
VLED
0.428
0.450
0.472
V
LEDx
Terminal
ILEDx
=
130mA
Oscillation frequency
FCT
142.5
150
157. 5
KHz
RT=100kohm
Max. duty cycle of output N
NMAX_DUTY
90
95
99
%
RT=100kohm
RT short protection range
RT_DET
-0.3
-
VRT×90%
V
RT=SWEEP DOWN
On resistance on N pin source
side
RONSO
1.5
3
6
Ω
On resistance on N pin sink side
RONSI
1.5
3
6
Ω
RT pin voltage
VRT
1
1.5
2
V
RT=100kohm
SS pin source current
ISSSO
-2.6
-2.0
-1.4
μA
VSS=2V
Soft start completion voltage
VSS_END
3.52
3.70
3.88
V
SS=SWEEP UP
FB source current
IFBSO
-115
-100
-85
μA
VLED=0V, VFB=1.0V
FB sink current
IFBSI
70
100
130
μA
VLED=5.0V(ALL_CH),
VFB=1.0V,VSS=4V
FB source mode
SS pin input voltage range
FB_SO_SS
4.9
-
-
V
SS=SWEEP UP
FB sink/source mode
SS pin input voltage range
FB_SOSI_SS
3.9
-
4.4
V
SS=SWEEP DOWN
Over current detect voltage
VCS
372
400
428
mV
CS=SWEEP UP
CS source current
ICS
15
30
60
μA
VCS=0V
【DC/DC protection Block】
OVP
Detect
Voltage
(DCDC
Stop)
VOVP
2.90
3.00
3.10
V
VOVP SWEEP UP
OVP protection timer release
VOVP_CAN
VOVP-0.14 VOVP-0.1 VOVP-0.04
V
VOVP SWEEP DOWN
Short protection detect voltage
VSCP
0.05
0.1
0.15
V
VOVP SWEEP DOWN
OVP pin leakage current
OVP_LK
-2
0
2
μA
VOVP=4V
4/35
TSZ02201-0F10C1002000-1-2
© 2013 ROHM Co., Ltd. All rights reserved.
19.Oct.2013 Rev.003
www.rohm.com
TSZ22111・15・001


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