BD8113EFV_11 Datasheet, PDF (1/20 Pages) Rohm – White Backlight LED Driver for Medium to Large LCD Panels (Switching Regulator Type)

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
Unit
Power supply voltage
VCC
36
V
BOOT ,OUTH Voltage
VBOOT, VOUTH
41
V
SW,CS Voltage
VSW, VCS
36
V
BOOT-SW Voltage
VBOOT-SW
7
V
LED output voltage
VLED1,2
36
V
VREG, OVP, OUTL, FAIL1, FAIL2, LEDEN,
VVREG, VOVP, VOUTL, VFAIL1, VFAIL2,
ISET, VDAC, PWM, SS, COMP, RT,
VLEDEN, VISET, VVDAC, VPWM, VSS,
-0.3～7 < VCC
V
SYNC, EN voltage
VCOMP, VRT, VSYNC, VEN
Power Consumption
Pd
1.10 ^※1
W
Operating temperature range
Topr
-40～+105
℃
Storage temperature range
LED maximum output current
Tstg
ILED
-55～+150
℃
150 ^{※2 ※3}
mA
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 V_F are correlated. Please refer to data on separate sheet.
*3 Amount of current per channel.
●Operating conditions (Ta=25℃)
Parameter
Symbol
Ratings
Power supply voltage
VCC
5.0～30
Oscillating frequency range
External synchronization frequency range ^{※4 ※5}
FOSC
FSYNC
250～600
fosc～600
External synchronization pulse duty range
FSDUTY
40～60
*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
%
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2011.07 - Rev.A