BD8112EFV-M Datasheet, PDF (1/19 Pages) Rohm – Automotive White LED Driver IC

Integrated Current-mode Buck-Boost DC/DC Controller
Automotive White LED Driver IC
BD8112EFV-M
●Description
BD8112EFV-M 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
Power supply voltage
BOOT Voltage
SW,CS,OUTH Voltage
BOOT-SW Voltage
LED output voltage
VREG, OVP, OUTL, FAIL1, FAIL2, LEDEN,
ISET, VDAC, PWM, SS, COMP, RT,
SYNC, EN voltage
Power Consumption
Operating temperature range
Storage temperature range
LED maximum output current
Junction temperature
Symbol
VCC
VBOOT
VSW, VCS, VOUTH
VBOOT-SW
VLED1,2
VVREG, VOVP, VOUTL, VFAIL1, VFAIL2,
VLEDEN, VISET, VVDAC, VPWM, VSS,
VCOMP, VRT, VSYNC, VEN
Pd
Topr
Tstg
ILED
Tjmax
Rating
Unit
36
V
41
V
36
V
7
V
36
V
-0.3～7 < VCC V
1.10 ^※1
W
-40～+105
℃
-55～+150
℃
150 ^{※2 ※3}
mA
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
Target value
Unit
Power supply voltage
VCC
5.0～30
V
Oscillating frequency range
FOSC
250～600
kHz
External synchronization frequency range ^{※4 ※5}
FSYNC
fosc～600
kHz
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.
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2009.09 - Rev.B