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Rohm Semiconductor Electronic Components Datasheet

BD8113EFV Datasheet

White Backlight LED Driver

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LED Drivers for LCD Backlights
White Backlight LED Driver
for Medium to Large LCD Panels
(Switching Regulator Type)
BD8113EFV
No.11040EAT04
Description
BD8113EFV is a white LED driver with the capability of withstanding high input voltage (36V MAX). This driver has 2ch
constant-current drivers integrated in 1-chip, which each channel can draw up to 150mA max, so that high brightness LED
driving can be realized. Furthermore, a current-mode buck-boost DC/DC controller is also integrated to achieve stable
operation against voltage input and also to remove the constraint of the number of LEDs in series connection.
The brightness can be controlled by either PWM or VDAC techniques.
Features
1) Input voltage range 5.0 – 30 V
2) Integrated buck-boost current-mode DC/DC controller
3) Two integrated LED current driver channels (150 mA max. each channel)
4) PWM Light Modulation(Minimum Pulse Width 25µs)
5) Oscillation frequency accuracy ±5%
6) Built-in protection functions (UVLO, OVP, TSD, OCP, SCP)
7) LED abnormal status detection function (OPEN/ SHORT)
8) HTSSOP-B24 package
Applications
Backlight for display audio, small type panels, etc.
Absolute maximum ratings (Ta=25)
Parameter
Symbol
Ratings
Power supply voltage
VCC
36
BOOT ,OUTH Voltage
VBOOT, VOUTH
41
SW,CS Voltage
VSW, VCS
36
BOOT-SW Voltage
VBOOT-SW
7
LED output voltage
VREG, OVP, OUTL, FAIL1, FAIL2, LEDEN,
ISET, VDAC, PWM, SS, COMP, RT,
SYNC, EN voltage
Power Consumption
VLED1,2
VVREG, VOVP, VOUTL, VFAIL1, VFAIL2,
VLEDEN, VISET, VVDAC, VPWM, VSS,
VCOMP, VRT, VSYNC, VEN
Pd
36
-0.37 < VCC
1.10 1
Operating temperature range
Topr -40+105
Storage temperature range
LED maximum output current
Tstg
ILED
-55+150
150 2 3
Junction temperature
Tjmax
150
*1 IC mounted on glass epoxy board measuring 70mm×70mm×1.6mm, power dissipated at a rate of 8.8mw/at temperatures above 25.
*2 Dispersion figures for LED maximum output current and VF are correlated. Please refer to data on separate sheet.
*3 Amount of current per channel.
Unit
V
V
V
V
V
V
W
mA
Operating conditions (Ta=25)
Parameter
Symbol
Ratings
Power supply voltage
VCC 5.030
Oscillating frequency range
External synchronization frequency range 4 5
FOSC
FSYNC
250600
fosc600
External synchronization pulse duty range
FSDUTY
4060
*4 Connect SYNC to GND or OPEN when not using external frequency synchronization.
*5 Do not switch between internal and external synchronization when an external synchronization signal is input to the device.
Unit
V
kHz
kHz
%
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/19
2011.07 - Rev.A


Rohm Semiconductor Electronic Components Datasheet

BD8113EFV Datasheet

White Backlight LED Driver

No Preview Available !

BD8113EFV
Technical Note
Electrical characteristics (Unless otherwise specified, VCC=12V Ta=25)
Parameter
Symbol
Limits
Min Typ Max.
Circuit current
ICC - 7 14
Standby current
[VREG Block (VREG)]
Reference voltage
[OUTH Block]
OUTH high-side ON resistance
OUTH low-side ON resistance
Over-current protection operating
voltage
[OUTL Block]
OUTL high-side ON resistance
OUTL low –side ON resistance
[SW Block]
SW low -side ON resistance
[Error Amplifie Block]
LED voltage
COMP sink current
COMP source current
[Oscillator Block]
Oscillating frequency
[OVP Block]
Over-voltage detection reference
voltage
OVP hysteresis width
SCP Latch OFF Delay Time
[UVLO Block ]
UVLO voltage
UVLO hysteresis width
[LED Output Block]
IST -
VREG
4.5
RONHH
RONHL
VOLIMIT
1.5
1.0
VCC
-0.66
RONLH
RONLL
2.0
1.0
RON_SW
2.0
VLED
ICOMPSINK
ICOMPSOURCE
0.9
15
-35
FOSC
285
VOVP
VOHYS
TSCP
VUVLO
VUHYS
1.9
0.45
70
3.7
400
LED current relative dispersion width
LED current absolute dispersion
width
ISET voltage
PWM minimum pulse width
PWM maximum duty
PWM frequency
ILED1
ILED2
VISET
Tmin
Dmax
FPWM
-3
-5
1.96
25
-
-
VDAC gain
GVDAC
-
Open detection voltage
VOPEN
LED Short detection Voltage
VSHORT
LED Short Latch OFF Delay Time
TSHORT
PWM Latch OFF Delay Time
TPWM
[Logic Inputs (EN, SYNC, PWM, LEDEN)]
Input HIGH voltage
VINH
Input LOW voltage
VINL
0.2
4.2
70
70
2.1
GND
Input current 1
IIN 20
Input current 2
IEN 15
[FAIL Output (open drain) ]
FAIL LOW voltage
VOL -
This product is not designed for use in radioactive environments.
4
5
3.5
2.5
VCC
-0.6
4.0
2.5
4.5
1.0
25
-25
300
2.0
0.55
100
4.0
500
-
-
2.0
-
-
-
25
0.3
4.5
100
100
-
-
35
25
0.1
8
5.5
7.0
5.0
VCC
-0.54
8.0
5.0
9.0
1.1
35
-15
315
2.1
0.65
130
4.3
600
+3
+5
2.04
-
100
20
-
0.4
4.8
130
130
5.5
0.8
50
35
0.2
Unit Conditions
EN=Hi, SYNC=Hi, RT=OPEN
mA PWM=Low, ISET=OPEN,
CIN=10µF
µA EN=Low
V IREG=-5mA, CREG=2.2µF
Ω ION=-10mA
Ω ION=10mA
V
Ω ION=-10mA
Ω ION=10mA
Ω ION_SW=10mA
V
µA VLED=2V, Vcomp=1V
µA VLED=0V, Vcomp=1V
KHz RT=100kΩ
V VOVP=Sweep up
V VOVP=Sweep down
ms RT=100kΩ
V VCC : Sweep down
mV VCC : Sweep up
%
%
V
µs
%
KHz
mA/V
V
V
ms
ms
ILED=50mA,
ΔILED1=(ILED/ILED_AVG-1)×100
ILED=50mA,
ΔILED2=(ILED/50mA-1)×100
RISET=120kΩ
FPWM=150Hz, ILED=50mA
FPWM=150Hz, ILED=50mA
Duty=50%, ILED=50mA
VDAC=02V, RISET=120kΩ
ILED=VDAC÷RISET×Gain
VLED= Sweep down
VOVP= Sweep up
RT=100kΩ
RT=100kΩ
V
V
µA
VIN=5V
(SYNC, PWM, LEDEN)
µA VEN=5V (EN)
V IOL=0.1A
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2/19
2011.07 - Rev.A


Part Number BD8113EFV
Description White Backlight LED Driver
Maker ROHM
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