BD9470AEFV Datasheet PDF - ROHM Semiconductor
| Part Number | BD9470AEFV | |
| Description | White LED driver | |
| Manufacturers | ROHM Semiconductor | |
| Logo |  |
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Datasheet
LED driver series for LCD back light
White LED driver for medium sized
and large sized LCD back light
BD9470AEFV・BD9470AFM
●General Description
BD9470AEFV and BD9470AFM are high efficiency
driver for white LED. They are designed for large sized
LCD. BD9470AEFV and BD9470AFM are built-in
DCDC converter that supply appropriate voltage for
light source.
BD9470AEFV and BD9470AFM are also built-in
protection function for abnormal state such as OVP:
over voltage protection, OCP: over current limit
protection of DCDC, SCP: short circuit protection, open
detection of LED string.
Thus they are used for conditions of large output
voltage and load conditions.
●Features
6ch LED constant current driver
LED maximum output current 250mA
Individual PWM dimming modulation allowed for
LEDs
±2% LED current accuracy (when each LED is set
to 130mA)
Built-in LED feedback voltage automatic adjustment
circuit according to LED current
Built-in start-up circuit independent of PWM light
modulation
built-in VOUT ・ FB voltage maintenance function
when PWM=Low（0%）
Built-in LED current stabilization circuit while
scanning operation is performed
Built-in VOUT discharge circuit while shutdown
Built-in LED protection (OPEN / SHORT protection)
Individual detection and individual LED OFF for
both open and short circuit
Adjustable LED short-circuit protection threshold
PWM-independent LED protection
VOUT over voltage protection (OVP) and reduced
voltage protection (SCP) circuit
Built-in failure indication function
Built-in ISET pin short-circuit protection circuit
●Typical Application Circuit
VIN
ISET
SS
PWM1
FB
PWM2
RT
PWM3
DCDC_GND
PWM4
N
PWM5
CS
PWM
PWM6
REG58
●Key Specifications
VCC supply Voltage range:
9.0V～35.0V
LED minimum output current:
40mA
LED maximum output current:
250mA
DCDC oscillation frequency: 150KHz(RT=100Kohm)
Operation circuit current:
6mA(typ.)
Operating temperature range:
-40℃～85℃
●Applications
■ LED driver for TV, monitor and LCD back light
●Package
HSOP-M28
HTSSOP-B28
W (Typ.) x D(Typ.) x H(Max.)
18.50mm x 9.90mm x 2.41mm
9.70mm x 6.40mm x 1.00mm
Figure 1. HSOP-M28
Figure 2. HTSSOP-B28
GND VCC
STB
FAIL
FAIL STB
OVP
LSP
LED6
UVLO
LED5
LED1
LED4
LED2
LED_GND
LED3
Figure 3. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/35
TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003
|
| |
 
BD9470AFM・BD9470AEFV
●Electrical Characteristics (unless otherwise specified, Ta = 25°C, VCC=24V)
Parameter
Symbol
Specification
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
unit
%
%
%
ISET pin voltage
ILLED
-0.8 -
0.8 uA
LEDｘ pin current accuracy1
【LED protection Block】
VISET
1.3 1.5
1.7
V
ISET short circuit protection range
LEDｘSHORT protection voltage
LSP pin resistive divider(Higher
R)
LSP pin resistive divider(Lower R)
LEDｘ OPEN detect voltage
【REG58 BLock】
ISET_DET
VLSP
RULSP
RDLSP
VOPEN
-0.3
8.5
1860
540
0.15
- VISET×90% V
9 9.5 V
3100
5580
kΩ
900 1620
kΩ
0.20 0.25
V
REG58 output voltage 1
REG58_1
5.742 5.8
5.858
V
REG58 output voltage 2
REG58 max output current
REG58_2
| IREG58 |
5.713
15
5.8
－
5.887
-
V
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
【STB Block】
REG58_DIS
3.0 5.0
7.0
uA
STB pin HIGH voltage
STBH
2 - 35 V
STB pin LOW voltage
STBL
-0.3 -
0.8 V
STB pin Pull Down resistance
【PWM Block】
PWMｘ pin HIGH voltage
PWMｘ pin LOW voltage
PWMｘ pin Pull Down resistance
【FAIL Block（OPEN DRAIN）】
RSTB
PWM_H
PWM_L
RPWM
600 1000
1800
kΩ
1.5
-0.3
1200
-
-
2000
15
0.8
3600
V
V
kΩ
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
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/35
TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for BD9470AEFV electronic component. |
| Information | Total 30 Pages | |
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| Download | [ BD9470AEFV.PDF Datasheet ] | |
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