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BD9420F PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD9420F
기능 LED Drivers
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BD9420F 데이터시트, 핀배열, 회로
Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD Panels
(DCDC Converter Type)
BD9420F
General Description
BD9420F is high efficiency driver for white LED. This is
designed for large sized LCD. BD9420F is built-in
DCDC converter that supply appropriate voltage for
light source.
BD9420F is 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 this is used for conditions of large output voltage
and load conditions.
Features
6ch LED constant current driver(External PNP Tr
Type)
Maximum LED setting current 500mA(VREF Pin
setting)
±2% LED current accuracy(VREF=0.9V setting)
Built-in DC/DC converter
Analog Dimming(Linear) function
Built-in PWM-independent soft start circuit
LED protection function(OPEN/SHORT
protection)[PWM-independent Type]
Individual detection and individual LED OFF for both
OPEN and SHORT circuit
VOUT Over Voltage Protection(OVP) and reduced
voltage protection(SCP) circuit
Built-in under voltage lockout function(UVLO) and
over voltage protection(OVP)
Built-in VOUT discharge circuit while shutdown
Key Specifications
VCC Supply Voltage Range:
9.0V to 35.0V
DCDC Oscillation Frequency: 150kHz(RT=100k)
Operation Circuit Current:
5mA(Typ)
Operating Temperature Range: -40°C to +85°C
Applications
LED driver for TV, Monitor and LCD Back Light
Package
SOP28
W(Typ) x D(Typ) x H(Max)
18.50mm x 9.90mm x 2.41mm
Pin Pitch 1.27mm
Figure 1. SOP28
Typical Application Circuit
Figure 2. Typical Application Circuit
Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
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TSZ02201-0F1F0C100300-1-2
31.Jan.2014 Rev.002
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BD9420F pdf, 반도체, 판매, 대치품
BD9420F
Datasheet
Electrical Characteristics(Unless otherwise specified VCC=24V Ta=25°C)
Parameter
Symbol
Min.
Limit
Typ.
Max.
[LED Protection Block]
LED OPEN Detect Voltage
VOPEN
0.05 0.10 0.15
LED SHORT Detect Voltage
CL Pin Low Detect Voltage
LSP Pin Pull Up Resistance
LSP Pin Pull Down Resistance
[REG75 Block]
VLSP
VCLLVP
RULSP
RDLSP
8.5 9.0 9.5
0.05 0.10 0.15
930
1550
2170
270 450 630
REG75 Output Voltage
REG75 MAX Output Current
REG75_UVLO Detect Voltage
REG75
| IREG75 |
7.425 7.50 7.575
10
-
REG75_TH
3.6
4.0
4.4
REG75_UVLO Hysteresis
REG75_HYS
250
500
750
REG75 Discharge Resistance
REG75_DIS 0.65 1.00 1.35
[STB Block]
STB Pin High Voltage
STB Pin Low Voltage
STB Pin Pull Down Resistance
[PWM Input Block]
STBH
STBL
RSTB
2.0 - VCC
-0.3 - 0.8
600
1000
1400
PWM Pin High Detect Voltage
PWM Pin Low Detect Voltage
PWM Pin Pull Down Resistance
[SEL Input Block]
PWM_H
PWM_L
RPWM
1.5 - 18
-0.3 -
0.8
600
1000
1400
SEL Pin High Detect Voltage
SEL Pin Low Detect Voltage
SEL Pin Pull Down Resistance
SEL_H
SEL_L
RSEL
1.5 - 18
-0.3 - 0.8
600
1000
1400
Unit Condition
V BSx=SWEEP DOWN
BSx=SWEEP UP,
V LSP=OPEN
V
kLSP=0V
kLSP=4V
V Io=0mA
mA
V REG75=SWEEP DOWN
mV
STB=ON->OFF,
REG75=SWEEP UP
M
STB=ON->OFF,
REG75=7.5V
V STB=SWEEP UP
V STB=SWEEP DOWN
kSTB=3.0V
V PWM=SWEEP UP
V PWM=SWEEP DOWN
kPWM=3.0V
V SEL=SWEEP UP
V SEL=SWEEP DOWN
kSEL=3.0V
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
4/28
TSZ02201-0F1F0C100300-1-2
31.Jan.2014 Rev.002
http://www.Datasheet4U.com

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BD9420F 전자부품, 판매, 대치품
BD9420F
Pin ESD Type
REG75 / N / PGND / CS
Datasheet
SEL / PWM(A,B,C)
FB
BS(1-6) / CL(1-6)
STB
LSP
4V
1.55M
LSP
450k
OVP
OVP
VREF
RT
Figure 6. Pin ESD Type
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
7/28
TSZ02201-0F1F0C100300-1-2
31.Jan.2014 Rev.002
http://www.Datasheet4U.com

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BD9420F

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