LED Driver Series for LCD Backlight
White backlight LED drivers
for medium to large LCD panels
(SWREG type)
No.09040EAT01
BD9202EFS
●Description
BD9202EFS is the LED driver IC which loads the step-up DCDC controller and the constant electric current driver of 8ch.
As for the constant electric current driver, PWM modulated light of 10bit gradation (1024stages) is possible with the register
setting from 4 line serial interfaces.
Because it can adjust brightness with every channel, back light is controlled in every area according to the light and shade
of the picture, rise of contrast ratio is actualized.
●Features
1)8ch constant electric current driver built-in
・ Largest drive electric current 150mA/CH *2
・10bit gradation (1024 stages) modulated light is possible by register setting
・To input the standard CLK of PWM from outside is possible (BCT_SYNC_IN terminal)
・Because it is high output resisting pressure (60V), the multi-stage connection of LED is p ossi b le
・Detecting abnormal mode with LED opening detection
2)Step-up DCDC controller built-in
3) UVLO function
4) 4 line serial interface
5) HTSSOP-A44 Package
●Applications
For the equipment of loading LCD indicator of TV, monitor and note PC and the like
●Absolute maximum rating (Ta=25℃)
Parameter
Symbol
Rating
Unit
Power supply voltage
VCC
CPUVDD
36
5.5
V
V
VREG
5.5
V
LED1～8 terminal voltage
VLED1～8
60
V
EN,LOADSW terminal voltage
VEN,VLOADSW
36
V
FAIL1,FAIL2 terminal voltage
VFAIL1,VFAIL2
VVREF, VISET, VVSET, VTEST, VBRT,
VRT, VCS, VUVLO,
VCOMP,VCP1,VCP2,VTOUT1,
VTOUT2,VSWOUT,VOVPVCT_SYNC_IN,
VCT_SYNC_OUT,VBCT_SYNC_IN,
VBCT_SYNC_OUT
7
V
-0.3～5.5＜
VREG
V
VREF,ISET,VSET,TEST,BRT,RT,
CS,UVLO,COMP,CP1,CP2,TOUT1,
TOUT2,SWOUT,OVP,CT_SYNC_IN,
CT_SYNC_OUT,BCT_SYNC_IN,
BCT_SYNC_OUT terminal voltage
CPUDI,CPUCLK,CPUCS,CPUDO
terminal voltage
VCPUDI, VCPUCLK, VCPUCS, VCPUDO
-0.3～5.5＜
CPUVDD
V
Power Dissipation
Pd
4.5 *1
W
Operating Temperature Range
Topr
-40～+85
℃
Storage Temperature Range
Tstg
-55～+150
℃
LED Maximum Current
ILED
150 *2 *3
mA
*1At the time of mounting 2 layer glass epoxy base-plate of 70mm×70mm×1.6mm, 36.0mW is reduced at 1 ℃ above Ta=25.
*2 When the VF variation of LED is large, the loss quantity with the driver will increase, because there are times when package
temperature rises, please do the base-plate design after considering heat dissipation measure sufficiently.
*3It is the electric current quantity per 1ch.
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