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PDF BD9423EFV Data sheet ( Hoja de datos )
| Número de pieza | BD9423EFV | |
| Descripción | 6ch boost LED driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
LED Drivers for LCD Backlights
6ch boost LED driver which constant setting
can be shared by I2C control
BD9423EFV
1.1 General Description
BD9423EFV 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. BD9423EFV 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 BD9423EFV is available for the
fail-safe design over a wide range output voltage.
Moreover the functions and the detection voltage can be
controlled by the I2C. This enables for the constant
setting of external parts to be shared by I2C control,
nevertheless the different usage condition.
Features
Operating power supply voltage range:9.0V to 35.0V
Oscillator frequency:
200kHz (RT=100kΩ)
Operating Current:
9mA (typ.)
Operating temperature range:
-40°C to +85°C
Key Specifications
LED drivers Max curret
400mA per channel
Constant current accuracy
±1.8% (IC only)
Current analog (linear) dimming by ADIM pin
Several protection functions
DCDC part
: OCP/OVP/UVLO
LED driver part :OPEN,SHORT detection
SHORT detection voltage is set by LSP pin
Error detection output by FAIL pin
Master/Slave mode inside
1.2 Package
HTSSOP-B40:
Pin Pitch:
W(Typ) x D(Typ) x H(Max)
13.60mm x 7.80mm x 1.00mm
0.65mm
Applications
TV, Computer Display, Notebook, LCD Backlighting
Typical Application Circuit
Figure 1. HTSSOP-B40
Figure 2. Typical application circuit
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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BD9423EFV
Datasheet
1.8 Electrical Characteristics 1/3 (unless otherwise specified, VIN=24V Tj=25°C)
Parameter
Symbol
Min Typ Max Unit
Condition
【Whole device】
Operating circuit current
Standby circuit current
DVDD circuit current
【UVLO block】
VCC operating supply voltage
VCC hysteresis voltage
UVLO release voltage
UVLO HYS width
UVLO pin input current
DVDD release voltage
DVDD HYS width
【REG9V block】
REG9V output voltage
REG9V max. output current
【DCDC block】
Error AMP reference voltage
FB sink current
ICC
ISTB
IDVDD
VUVLO_VCC
VUHYS_VCC
VUVLO_UVLO
VUHYS_UVLO
IUVLO
VUVLO_DVDD
VUHYS_DVDD
REG9V
IREG9V
VEAMP
IFBSINK
-
-
-
7.0
150
2.40
100
-2
2.10
100
8.91
20
0.97
0.578
0.278
85
FB source current (Master) IFBSOURCEM -115
FB source current (Slave)
LED_LV pin input current
Oscillation frequency
MAX DUTY
SS pin source current
SS pin release voltage
IFBSWRCKS
ILED_LV
FCT
DMAX
ISS
VSS
-230
-2
190
83
-3.75
3.8
9
15
1.8
7.5
300
2.50
200
0
2.35
200
9.0
-
1.00
0.60
0.300
100
-100
-200
0
200
89
-3.0
4.0
16 mA STB=3.0V, LED1-6=ON, RT=100kΩ
25 μA STB=0V
- mA DVDD=3.3V
8.0 V VCC=SWEEP UP
600 mV VCC=SWEEP DOWN
2.60 V VUVLO=SWEEP UP
400 mV VUVLO=SWEP DOWN
2 A VUVLO=3.0V
2.60 V VDVDD=SWEEP UP
400 mV VDVDD=SWEP DOWN
9.09 V IO=0mA, VCC>11.0V
- mA
1.03
0.622
0.322
115
-85
-170
2
210
96
-2.25
4.2
V LED_LV=1.0V, LEDLV[3:0]=0000
V LEDLV[3:0]=1001
V LEDLV[3:0]=1111
μA LED_LV=1.0V, LEDx=2.0V, VFB=1.0V
μA
LED_LV=1.0V, LEDx=0.0V,
VFB=1.0V,CS=0.0V
μA LEDx=0V,VFB=1.0V,CS=5.0V
μA VLED_LV=3.0V
kHz RT=100kΩ, FOSC[4:0]=00000
%
μA SS=0V
V SS=SWEEP UP
N pin source resistor
N pin sink resistor
RONH
RONL
- 2.5 3.5 Ω ION=-10mA
- 3.0 4.2 Ω ION=10mA
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
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5 Page 
BD9423EFV
1.12.2 Data format
1byte Write format
Datasheet
Figure 11. 1byte Write Data Format
1byte Read format (Read from select address=00h)
Figure 12. 1byte Read Data Format (Select Address=00h)
1byte Read format (Read from specific Select Address)
Consecutive Write format
Figure 13. 1byte Read Data Format (specified select address)
Figure 14. Consecutive Write Data Format
Consecutive Read format (Read from specific Select Address)
Figure 15. Consecutive Read Data Format
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
11/57
TSZ02201-0F2F0C100080-1-2
9.Oct.2015 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD9423EFV.PDF ] | |
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