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BD8108FM-E2

Description
IC led driver auto 4x150ma
Categorysemiconductor    Analog mixed-signal IC   
File Size807KB,16 Pages
ManufacturerROHM Semiconductor
Websitehttps://www.rohm.com/
Environmental Compliance  
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BD8108FM-E2 Overview

IC led driver auto 4x150ma

TECHNICAL NOTE
For LCD panel backlight
White LED driver IC(under development)
BD8108FM
Outline
BD8108FM is a white LED driver of high-withstand-voltage (36V).
Step-up DC/DC converter and constant current output 4ch are built-in in 1chip.
The brightness can be controlled by either PWM or VDAC.
Features
1) Input voltage range 4.5∼30V
2) Built-in Step-up DC/DC controller
3) Built-in current driver 4ch (150mA max.) for LED drive
4) Compatible with PWM light-modulating 0.38∼99.5%
5) Built-in protective functions (UVLO, OVP, TSD, OCP)
6) Built-in abnormal-status-detecting function (open/short)
7) HSOP-M28 package
Application
Car navigation backlight and small & medium-sized LCD panel etc.
Absolute maximum ratings (Ta=25℃)
Item
Symbol
Rating
Power supply voltage (Pin : 1)
V
CC
36
Load switch output voltage (Pin : 2)
V
LOADSW
36
LED output voltage(Pin : 12,14,15,17)
V
LED
36
FAIL output voltage (Pin : 3,20)
V
OL
7
Input voltage (Pin : 5,6,10,11,24)
V
IN
-0.3∼7 < V
CC
VDAC input voltage (Pin : 8)
V
DAC
-0.3∼7 < V
CC
Allowable loss
Pd
2.20
1
Junction temperature
Tjmax
150
Operating temperature range
Topr
-40∼+95
Storage temperature range
Tstg
-55∼+150
LED maximum output current (Pin :
I
LED
150
※2 ※3
12,14,15,17)
rev. 0.14
Unit
V
V
V
V
V
V
W
mA
※1
It is mounted on a glass epoxy board of 70mm×70mm×1.6mm. And the allowable loss is reduced at a rate of 17.6mw/℃
at the time of over 25℃.
※2
Dispersion between columns of LED maximum output current and V
F
is correlated. Please refer to data on a separate
sheet.
※3
Amount of the current per 1ch.
Operating condition (Ta=25℃)
Item
Symbol
Target value
Unit
Power supply voltage (Pin : 1)
V
CC
4.5∼30
V
Oscillating frequency range
F
OSC
50∼550
kHz
F
SYNC
External synchronization frequency
fosc∼550
kHz
range
※4 ※5
(Pin : 6)
External synchronization pulse duty
F
SDUTY
40∼60
%
range (Pin : 6)
※4
Please connect SYNC to GND when external synchronization frequency is not used.
※5
Do not do such things as switching over to internal oscillating frequency while external synchronization frequency is
used.
2007.Jan.
ROHM Limited Corporation
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