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BD9411F PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD9411F
기능 White LED Driver
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BD9411F 데이터시트, 핀배열, 회로
LED Drivers for LCD Backlights
1ch Boost up Type
White LED Driver for large LCD
BD9411F
General Description
BD9411F is a high efficiency driver for white LEDs and is
designed for large LCDs. BD9411F has a boost DCDC
converter that employs an array of LEDs as the light
source.
BD9411F has some protect functions against fault
conditions, such as over-voltage protection (OVP), over
current limit protection of DCDC (OCP), LED OCP
protection, and over-boost protection (FBMAX).
Therefore it is available for the fail-safe design over a
wide range output voltage.
Key Specifications
Operating power supply voltage range: 9.0V to 35.0V
Oscillator frequency of DCDC: 150kHz (RT=100kΩ)
Operating Current:
3.3 mA(Typ)
Operating temperature range:
-40°C to +105°C
Package(s)
SOP18
W(Typ) x D(Typ) x H(Max)
11.20mm x 7.80mm x 2.01mm
Pin pitch 1.27mm
Features
DCDC converter with current mode
LED protection circuit (Over boost protection, LED
OCP protection)
Over-voltage protection (OVP) for the output voltage
VOUT
Adjustable soft start
Adjustable oscillation frequency of DCDC
Wide range of analog dimming 0.2V to 3.0V
UVLO detection for the input voltage of the power
stage
LED Dimming PWM Over Duty Protection(ODP)
Applications
TV, Computer Display, LCD Backlighting
Figure 1. SOP18
Typical Application Circuit
VCC
VIN
VOUT
VCC
UVLO OVP
REG90
STB
GATE
RT
CS
SS
FAIL
PWM
DIMOUT
ADIM
ISENSE
DUTYP
DUTYON
GND
FB
Rs
Figure 2. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
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© 2017 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has not designed protection against radioactive rays
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TSZ02201-0T2T0C100250-1-2
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BD9411F pdf, 반도체, 판매, 대치품
BD9411F
Absolute Maximum Ratings (Tj=25°C)
Parameter
Power Supply Voltage
SS, RT, ISENSE, FB, CS,
DUTYP Pin Voltage
REG90, DIMOUT, GATE
Pin Voltage
OVP, UVLO, PWM, ADIM, STB,
FAIL, DUTYON
Pin Voltage
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Symbol
VCC
SS, RT, ISENSE, FB, CS,
DUTYP
REG90, DIMOUT, GATE
OVP, UVLO, PWM,
ADIM, STB, FAIL,
DUTYON
Topr
Tjmax
Tstg
Rating
-0.3 to +36
-0.3 to +7
-0.3 to +13
-0.3 to +20
-40 to +105
150
-55 to +150
Unit
V
V
V
V
°C
°C
°C
Thermal Resistance(Note 1)
Parameter
Symbol
Thermal Resistance (Typ)
1s(Note 3)
2s2p(Note 4)
Unit
SOP18
Junction to Ambient
θJA 179.3
119.9
°C/W
Junction to Top Characterization Parameter(Note 2)
ΨJT 20.0
17.0 °C/W
(Note 1)Based on JESD51-2A(Still-Air)
(Note 2)The thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside
surface of the component package.
(Note 3)Using a PCB board based on JESD51-3.
(Note 4)Using a PCB board based on JESD51-7.
Layer Number of
Measurement Board
Single
Material
FR-4
Board Size
114.3mm x 76.2mm x 1.57mmt
Top
Copper Pattern
Footprints and Traces
Thickness
70μm
Layer Number of
Measurement Board
4 Layers
Top
Copper Pattern
Footprints and Traces
Material
FR-4
Thickness
70μm
Board Size
114.3mm x 76.2mm x 1.6mmt
2 Internal Layers
Copper Pattern
74.2mm x 74.2mm
Thickness
35μm
Bottom
Copper Pattern
74.2mm x 74.2mm
Thickness
70μm
Recommended Operating Ranges
Parameter
Power Supply Voltage
DC/DC Oscillation Frequency
Effective Range of ADIM Signal
PWM Input Frequency
Symbol
VCC
fsw
VADIM
FPWM
Range
9.0 to 35.0
50 to 1000
0.2 to 3.0
90 to 2000
Unit
V
kHz
V
Hz
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© 2017 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/34
TSZ02201-0T2T0C100250-1-2
20.Feb.2017 Rev.001

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BD9411F 전자부품, 판매, 대치품
BD9411F
Typical Performance Curves (Reference data)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
STB=3.0V
0.5 PWM=3.0V
Ta=25°C
0.0
10 15 20 25 30 35
VCC[V]
Figure 5. Operating circuit current
100
80
60
40
20
0
0
VCC=24V
Ta=25°C
1 23
VFB[V]
4
Figure 7. Duty cycle vs FB character
80
70
60
50
40
30
20
10
0
10
STB=0V
PWM=0V
Ta=25°C
STB=3.0V
PWM=3.0V
Ta=25°C
15 20 25 30
VCC[V]
Figure 6. Standby circuit current
35
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
VCC=24V
Ta=25°CVCC=24V
Ta=25°C
123
VADIM[V]
4
Figure 8. ISENSE feedback voltage vs ADIM character
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© 2017 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/34
TSZ02201-0T2T0C100250-1-2
20.Feb.2017 Rev.001

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부품번호상세설명 및 기능제조사
BD9411F

White LED Driver

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