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2011.08 - Rev.B
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Power Management IC Series for Automotive Body Control
White Backlight LED Driver
for Medium to Large LCD Panels
(Switching Regulator Type)
BD8119FM-M
●Description
BD8119FM-M is a white LED driver with the capability of withstanding high input voltage (36V MAX).
This driver has 4ch 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 unstable
car-battery 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 is 5.0 to 30 V
2) Integrated buck-boost current-mode DC/DC controller
3) Four integrated LED current driver channels (150mA max. each channel)
4) PWM Light Modulation (Minimum Pulse Width 25µs)
5) Built-in protection functions (UVLO, OVP, TSD, OCP, SCP)
6) Abnormal status detection function (OPEN/ SHORT)
7) HSOP-M28 package
●Applications
Backlight for car navigation, dashboard panels, etc.
(※ Recommended Component of Toshiba Matsushita Display Technology Co.,Ltd. )
●Absolute maximum ratings (Ta=25℃)
Parameter Symbol Ratings Unit
Power supply voltage V
CC
36 V
BOOT ,OUTH Voltage V
BOOT,
V
OUTH
41 V
SW,CS Voltage V
SW,
V
CS,
V
OUTH
36 V
BOOT-SW Voltage V
BOOT-SW
7 V
LED output voltage V
LED1
～
4
36 V
VREG, OVP, OUTL, FAIL1, FAIL2,
LEDEN1, LEDEN2, ISET, VDAC,
PWM, SS, COMP, RT, SYNC, EN Voltage
V
VREG,
V
OVP,
V
OUTL,
V
FAIL1,
V
FAIL2,
V
LEDEN1,
V
LEDEN2,
V
ISET,
V
VDAC,
V
PWM,
V
SS,
V
COMP,
V
RT,
V
SYNC,
V
EN
-0.3～7 < V
CC
V
Power Consumption Pd 2.20
※
1
W
Operating temperature range Topr -40～+95 ℃
Storage temperature range Tstg -55～+150 ℃
LED maximum output current I
LED
150
※
2
※
3
mA
※1 IC mounted on glass epoxy board measuring 70mm×70mm×1.6mm, power dissipated at a rate of 17.6mw/℃ 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 Unit
Power supply voltage V
CC
5.0～30 V
Oscillating frequency range F
OSC
250～550 kHz
External synchronization frequency range
※
4
※
5
F
SYNC
fosc～550 kHz
External synchronization pulse duty range F
SDUTY
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.
No.11039EBT07
