BD9202EFS 데이터 시트보기 (PDF) - ROHM Semiconductor

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BD9202EFS

White backlight LED drivers

ROHM Semiconductor 

LED Driver Series for LCD Backlight

White backlight LED drivers

for medium to large LCD panels

(SWREG type)

BD9202EFS

No.09040EAT01

●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

VREG

36

V

5.5

V

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

7

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

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

-0.3～5.5＜

VREG

V

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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© 2009 ROHM Co., Ltd. All rights reserved.

1/19

2009.04 - Rev.A

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