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BD9422EFV PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD9422EFV
기능 White LED Driver
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BD9422EFV 데이터시트, 핀배열, 회로
Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
panel
BD9422EFV
General Description
BD9422EFV is a high efficiency driver for white LEDs
and designed for large LCD panel. This IC is built-in
high current drive and high responsibility type 6ch LED
drivers and 1ch boost DCDC converter. BD9422EFV
has some protect function against fault conditions,
such as the over-voltage protection (OVP), LED OPEN
and SHORT protection, the over current limit
protection of DCDC (OCP). Therefore BD9422EFV 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:
500kHz (RT=30k)
Operating Current:
9mA (typ.)
Operating temperature range:
-40°C to +85°C
Applications
TV, Computer Display, Notebook, LCD Backlighting
Typical Application Circuit
Features
6ch Constant LED drivers, available 400mA drive
per 1ch.
Constant current accuracy ±1.8% (IC only)
Each 6ch external PWM inputs can control independent
dimming .
Current analog (linear) dimming by VREF
1ch boost controller with current mode (external FET)
Several protection functions
DCDC part
: OCP/OVP/UVLO/TSD
LED driver part :OPEN,SHORT detection
SHORT detection voltage is set by LSP terminal.
Error detection output FAIL terminal inside
(normal=Open, error=Drain)
Master/Slave mode inside
Package
HTSSOP-B40
Pin Pitch:
W(Typ.) D(Typ.) H(Max.)
13.60mm x 7.80mm x 1.00mm
0.65mm
Figure 1. Typical Application Circuit
Figure 2. HTSSOP-B40
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/26
TSZ02201-0F1F0C100210-1-2
1.Sep.2015 Rev.006




BD9422EFV pdf, 반도체, 판매, 대치품
BD9422EFV
Datasheet
1.2 Electrical Characteristics 2(Unless otherwise specified, Ta=25°CVCC=24V)
Parameter
Symbol
Min.
Limit
Typ.
Max.
UVLO block
Operation power source voltage (VCC) VUVLO_VCC 7.0 7.5 8.0
Hysteresis voltage (VCC)
VUHYS_VCC 150 300 600
UVLO Release voltage
VUVLO_U
2.40
2.50
2.60
UVLO detection voltage
VUVLOD_U 2.15 2.30 2.45
UVLO terminal input resistance
RUVLO
395 610 825
Filter block
CP detection voltage
CP source current
VCP
ICP
1.9 2.0 2.1
-1.2 -1.0 -0.8
LED driver block
S terminal voltage
LED current rise time
LED current fall time
OPEN detection voltage
VSLED
ILEDtr
ILEDtf
VOPEN
196 200 204
294.6 300 305.4
392.8 400 407.2
491 500 509
- 400 760
- 100 280
0.12 0.20 0.28
SHORT detection voltage
VSHORT
5.7
6.0
6.3
SHORT MASK voltage
VREF terminal input current
LSP terminal input current
VSHTMASK 2.85 3.0 3.15
IVREF -2 0
2
ILSP
-2 0
2
STB block
STB terminal HIGH voltage
STB terminal LOW voltage
STB terminal Pull Down resistance
STBH
STBL
RSTB
2.0 - VCC
-0.3 -
0.8
0.5 1.0 1.5
PWM IN block
PWM terminal HIGH voltage
PWMH
PWM terminal LOW voltage
PWML
PWM terminal Pull Down resistance
RPWM
FAIL_MODE,FAIL_RST,SUMPWM block
2.0 - 20
-0.3 -
0.8
200 300 400
Input terminal High voltage
Input terminal Low voltage
Input terminal Pull Down resistance
FAIL blockOPEN DRAIN)】
FAIL LOW output voltage
VINH
VINL
RVIN
VOL
2.0 - 20
-0.3 - 0.8
60 100 140
0.25 0.5
1.0
Unit Condition
V VCC=SWEEP UP
mV VCC=SWEEP DOWN
V VUVLO=SWEEP UP
V VUVLO=SWEEP DOWN
kVUVLO=3V
V CP=SWEEP UP
μA VCP=0V
mV VREF=1.0V
mV VREF=1.5V
mV VREF=2.0V
mV VREF=2.5V
ns VREF=0.3V,RS=2
ns VREF=0.3V,RS=2
V VLED=SWEEP DOWN
V
VLED=SWEEPUP,
VLSP=1.2V
V
μA VVREF=3V
μA VLSP=3V
V
V
MSTB=3V
V
V
kPWM=3V
V
V
kVIN=3V
V IOL=1mA
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
4/26
TSZ02201-0F1F0C100210-1-2
1.Sep.2015 Rev.006

4페이지










BD9422EFV 전자부품, 판매, 대치품
BD9422EFV
1.5Typical Performance Curvesreference data
14
12
10
8
6
4
2
0
10
STB=3V
PWM1-6=0V
Ta=25°C
14 18 22 26 30
VCC [V]
Figure 6. Circuit current
34
Datasheet
50
40
30
20
10
0
10
STB=0V
PWM1-6=0V
Ta=25°C
14 18 22 26 30 34
VCC [V]
Figure 7. Stand-by circuit current
100
80
60
40
20
0
0
VCC=24V
Ta=25°C
1234
FB [V]
Figure 8. FB v.s. Duty Cycle
60
1000
800
600
400
200
0
0
VCC=24V
RS=2
LED1=2.5V
Ta=25°C
12 3
VREF [V]
4
Figure 9. VREF v.s. Sx
30
VCC=24V
RS=20
Ta=25°C
0
01 23
PWM1 [V]
Figure 10. PWM terminal threshold voltage
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
7/26
TSZ02201-0F1F0C100210-1-2
1.Sep.2015 Rev.006

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BD9422EFV

White LED Driver

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