bd9202efs ROHM Co. Ltd., bd9202efs Datasheet - Page 3

• Manufacturer Part Number: bd9202efs
• Description: White Backlight Led Drivers For Medium To Large Lcd Panels Swreg Type
• Manufacturer: ROHM Co. Ltd.

【LOADSW section】
LOADSW ON value of resistance
【Filter(CP1,CP2) section】
CP Detection voltage
CP Charging current
【LED output (LED1～8) section】
LED
variation
ISET Clamp voltage
Open detection voltage
Short detection voltage
【
Input High voltage
Input Low voltage
(CPUCS,CPUCLK,CPUDI)
Input influx electric current (EN)
【Logic output section(CPUDO)】
output High voltage
output Low voltage
【FAIL1,2outut open drain】
FAIL Low voltage
＊This product is not designed for protection against radioactive rays.
●Block diagram
© 2009 ROHM Co., Ltd. All rights reserved.
BD9202EFS
www.rohm.com
Input influx electric current
Logic input(EN,CPUCS,CPUCLK,CPUDI)
V
Electric
IN
CPUVDD
CPUCLK
CPUCS
CPUDO
CPUDI
R
C
BCT_SYNC_OUT
BCT_SYNC_IN
Parameter
CT_SYNC_OUT
PC
PC
CT_SYNC_IN
C
IN
TOUT2
COMP
AGND
VSET
ISET
BRT
current
TEST
VCC
VREF
EN
RT
36
19
14
41
16
28
37
35
39
11
13
12
10
40
18
17
27
38
8
9
UVLO
I/F
34
absolute
CREG
ISET
Logic
OSC2
OSC1
VREG
15
】
VREG
PWMCLK
PWM COMP
-
+
+
33
R
ERR AMP
VSHORT
LOADSW
VOPEN
VOUTH
Symbol
⊿ILED
VOUTL
UVLO
ON_LOAD
VISET
EXT
VINH
VINL
VCP
VOL
ICP
IEN
IIN
Current driver
UVLO
VREG
Open-Short
Control
-
-
-
-
-
-
Logic
-
-
+
Detect
TSD
OCP
OVP
CPUVDD
0.05
0.07
0.7×
-2.0
-0.3
Min
1.2
1.8
1.8
3.5
2.4
13
-5
-
-
3/19
-
+
FILTER
Limit
0.20
0.25
0.14
-1.0
Typ
2.0
2.0
2.0
4.0
2.7
25
0
Driver
-
-
-
FILTER
CPUVDD
CPUVDD
30
31
29
32
20
22
23
25
42
44
21
24
43
26
4
6
1
3
2
5
7
Max
0.35
0.28
0.3×
FAIL2
-0.5
OVP
CP1
FAIL1
SWOUT
+0.3
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
2.2
2.2
2.2
4.5
0.6
CS
PGND1
CP2
(5)
TOUT1
38
5
-
PGND2
PGND3
PGND4
PGND5
CP1
CP2
Unit
kΩ
uA
uA
uA
%
V
V
V
V
V
V
V
V
V
COUT
ILOAD=1mA
CP1,CP2=Sweep up
CP1,CP2=0V
ILED=75mA,VSET=1.65V
RISET=130kΩ
when input VSET＞VISET
VLED=Sweep down
VLED=Sweep up
VIN=5V(CPUCS,
CPUCLK,CPUDI),
CPUVDD=5V
VEN=5V(EN)
IOL=-1mA,CPUVDD=3V
IOL=1mA,CPUVDD=3V
IOL=1mA
+
Nov.29.2007
Condition
Technical Note
2009.04 - Rev.A