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부품번호 | BD9483F 기능 |
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기능 | White LED Driver | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 32 페이지수
Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
Panels (DCDC Converter type)
BD9483F,FV
●General Description
BD9483F,FV is a high efficiency driver for white LEDs
and designed for large LCDs. This IC is built-in 2ch
boost DCDC converters that employ an array of LEDs
as the light source. BD9483F,FV has some protect
function against fault conditions, such as the
over-voltage protection (OVP), the over current limit
protection of DCDC (OCP), Max duty protection, LED
OCP protection. Therefore BD9483F,FV is available for
the fail-safe design over a wide range output voltage.
●Key Specification
Operating power supply voltage range:11.0V to 35.0V
Oscillator frequency:
150kHz (RT=100kΩ)
Operating Current:
3mA (typ.)
Operating temperature range:
-40°C to +85°C
●Applications
TV, Computer Display, Notebook, LCD Backlighting
●Features
■ 2ch boost DCDC converter with current mode
■ LED protection circuit (Max duty protection, LED
OCP protection)
■ Over-voltage protection (OVP) for the output
voltage Vout
■ Adjustable soft start
■ The wide range of analog dimming 0.2V-3.0V
■ 2ch independent PWM dimming input
■ The UVLO detection for the input voltage of the
power stage
■ FAIL logic output
●Package
SOP-24:
Pin Pitch:
W(Typ.) D(Typ.) H(Max.)
15.00mm x 7.80mm x 2.01mm
1.27mm
●Typical Application Circuit
VCC
VIN
VOUT1
VOUT2
REG90
STB
RT
Css SS
Ccp CP
FAILB
PWM1
PWM2
ADIM
VCC
VREG
UVLO
VCC
UVLO
UVLO
TSD
OVP
OVP
REG90
UVLO
OSC
SS
SS-FB
clamper
Fail
detect
PWM
COMP
CONTROL
LOGIC
Current
compensation
REG90
GATE1
CS1
LEB
PGND1
REG90
DIMOUT1
MAXFB
LEDOCP
ERROR
amp
1.0V
ISENSE1
FB1
Each channel
GATE2
CS2
1/3 PGND2
DIMOUT2
ISENSE2
FB2
Figure 1. Typical Application Circuit
Figure 2-1. SOP-24
SSOP-B24:
Pin Pitch:
W(Typ.) D(Typ.) H(Max.)
7.80mm x 7.60mm x 1.35mm
0.65mm
Figure 2-2. SSOP-B24
○Product structure:Silicon monolithic integrated circuit
.www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/29
TSZ02201-0F1F0C100100-1-2
28.Nov.2013 Rev.003
Free Datasheet http://www.datasheet4u.net/
BD9483F,FV
Datasheet
●1.2 Electrical Characteristics 2(Unless otherwise specified, Ta=25°C,VCC=24V)
Parameter
Symbol
Min.
Limit
Typ.
Max.
【LED protection block】
LED OCP detect voltage
VLEDOCP
2.88
3.0
3.12
MAX duty detect voltage
【Dimming block】
VFBMAX 3.84 4.0 4.16
ADIM pin leak current
ILADIM -2 0
2
ISENSE pin leak current
IL_ISENSE
-2
0
2
DIMOUT source on-resistance
RONSO
4.0 8.0 16.0
DIMOUT sink on-resistance
【REG90 block】
RONSI
2.5 5.0 10.0
REG90 output voltage
VREG90
8.91 9.00 9.09
REG90 available current
|IREG90|
15
-
-
REG90_UVLO detect voltage
REG90_TH
5.4
6.0
6.6
REG90_UVLO hysteresis
REG90_HYS
250
500
750
REG90 discharge resistance
【STB block】
REG90_DIS
325
500
675
STB pin HIGH voltage
STBH
2.0 -
35
STB pin LOW voltage
STBL
-0.3 -
0.8
STB pull down resistor
【PWM block】
ISTB
600
1000
1400
PWMx pin HIGH Voltage
PWM_H
2.0
-
5.5
PWMx pin LOW Voltage
PWM_L
-0.3
-
0.8
PWMx pin Pull Down resistance
【FAIL block (OPEN DRAIN)】
RPWM
600
1000
1400
FAILB pin on-resistance
RFAIL
250 500 1000
FAILB pin leak current
ILFAIL
-2 0
2
CP detect voltage
VCP
2.85 3.0 3.15
CP charge current
ICP 2.7 3.0 3.3
Unit Condition
V VISENSE=SWEEP UP
V VFB=SWEEP UP
μA VADIM=2.0V
μA VISENSE=4V
Ω ION=-10mA
Ω ION=10mA
V IO=0mA,VCC>11V
mA
V REG90=SWEEP DOWN
VSTB=H->L,
mV REG90=SWEEP UP
VSTB=H->L,
kΩ REG90=9.0V
V VSTB=SWEEP UP
V VSTB=SWEEP DOWN
kΩ VSTB=3.0V
V VPWMx=SWEEP UP
V VPWMx=SWEEP DOWN
kΩ VPWMx=3.0V
Ω VFAIL=1.0V
μA VFAIL=15V
V VCP=SWEEP UP
μA
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/29
TSZ02201-0F1F0C100100-1-2
28.Nov.2013 Rev.003
Free Datasheet http://www.datasheet4u.net/
4페이지 BD9483F,FV
●1.5 Typical Performance Curves (Reference data)
5
4
3
2
1
0
10
STB=5V
PWM1=PWM2=0V
Ta=25°C
14 18 22 26 30
VCC [V]
Figure 7. Circuit current
(operating mode)
34
100
10
1
0.1
0.01
0.001
10
Datasheet
VCC=24V
Ta=25°C
100
RT [kohm]
Figure 8. fCT v.s. RT
1000
160
140
120
100
80
60
40
20
0
0.5
VCC=24V
Ta=25°C
1.5 2.5
FB [V]
3.5
Figure 9. FB sink current v.s. FB voltage
0
-20
-40
-60
-80
-100
-120
-140
-160
0.5
VCC=24V
Ta=25°C
1.5 2.5
FB [V]
3.5
Figure 10. FB source current v.s. FB voltage
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
VCC=24V
Ta=25°C
12
ADIM [V]
3
Figure 11. ISENSE feedback voltage v.s. ADIM
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
7/29
TSZ02201-0F1F0C100100-1-2
28.Nov.2013 Rev.003
Free Datasheet http://www.datasheet4u.net/
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부품번호 | 상세설명 및 기능 | 제조사 |
BD9483F | White LED Driver | ROHM Semiconductor |
BD9483FV | White LED Driver | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |