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BD9479FV PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD9479FV
기능 White LED Driver
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BD9479FV 데이터시트, 핀배열, 회로
Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
Panels (DCDC Converter type)
BD9479FV
General Description
BD9479FV is a high efficiency driver for white LEDs
and designed for large LCDs. This IC is built-in a boost
DCDC converters that employ an array of LEDs as the
light source. BD9479FV has some protect function
against fault conditions, such as the over-voltage
protection (OVP), the over current limit protection of
DCDC (OCP), the short circuit protection (SCP), the
open detection of LED string. Therefore BD9479FV is
available for the fail-safe design over a wide range
output voltage.
Key Specification
Operating power supply voltage range: 9.0V to 35.0V
Oscillator frequency:
150kHz (RT=100kΩ)
Operating Current:
8.7mA (typ.)
Operating temperature range:
-40to +85
Applications
TV, Computer Display, Notebook, LCD Backlighting
Features
8ch LED constant current driver (external PNP Tr
Type)
Maximum LED setting current 500mA (VREF pin
setting)
Build-in DC/DC converter
Analog Dimming (Linear) function
Individual channel PWM Dimming function
LED protection function (Open Short protection)
[PWM-independent Type]
Output short protection (OVP)
Built-in Timer latch function (CP)
Built-in under voltage Lockout function (UVLO)over
voltage protection (OVP)
Built-in FAIL indication function
Built-in OVP voltage Feedback function
Built-in PWM-independent soft start circuit
SSOP-B40 Package
Package
SSOP-B40:
Pin Pitch:
W(Typ.) D(Typ.) H(Max.)
13.6mm x 7.80mm x 1.80mm
0.65mm
Typical Application Circuit
Figure 1. SSOP-B40
Figure 2. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/26
TSZ02201-0F1F0C100020-1-2
25.Sep.2015 Rev.002




BD9479FV pdf, 반도체, 판매, 대치품
BD9479FV
Datasheet
Electrical Characteristics (Unless otherwise noted, Ta = 25oC, VCC=24V)
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 Detect Voltage
LSP pin pull high resistor
LSP pin pull down resistor
[REG50 Block]
VLSP
VCLLVP
RULSP
RDLSP
8.5
0.05
1260
540
9.0
0.10
2100
900
9.5
0.15
3180
1620
REG50 output Voltage
REG50 maximum output current
REG50
4.95 5.00 5.05
|IREG50|
5
-
-
[STB Block]
STB pin HIGH Voltage
STB pin LOW Voltage
STB pin Pull Down resistor
[PWM input Block]
STBH
STBL
RSTB
2.0 - VCC
-0.3 - 0.8
0.5 1.0 2.0
PWMx pin High detect voltage
PWM_H
2.0
PWMx pin Low detect voltage
PWM_L
-0.3
PWMx pin Pull Down resistor
RPWM
0.5
[FAIL Block(OPEN DRAIN)]
FAIL pin Ron
RFAIL
30
FAIL pin Leakage current
ILFAIL
-1.0
(This product is not designed to be radiation-proof.)
-
-
1.0
50
0.0
18
0.8
2.0
85
1.0
Unit Condition
V BSx=SWEEP DOWN
BSx=SWEEP UP,
V LSP=OPEN
V
kLSP=0V
kLSP=3V
V Io=-5mA
mA
DCDC block consumption
is neglected.
V STB=SWEEP UP
V STB=SWEEP DOWN
MSTB=3.0V
V PWM=SWEEP UP
V PWM=SWEEP DOWN
MPWM=3.0V
uA FAIL=36V
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/26
TSZ02201-0F1F0C100020-1-2
25.Sep.2015 Rev.002

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BD9479FV 전자부품, 판매, 대치품
BD9479FV
UVLO
FAIL
Datasheet
Block Diagram
Figure 5-2. Pin ESD Type
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
Figure 6. Block Diagram
7/26
TSZ02201-0F1F0C100020-1-2
25.Sep.2015 Rev.002

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부품번호상세설명 및 기능제조사
BD9479FV

White LED Driver

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