BD9745EKN Datasheet, PDF (9/22 Pages) Rohm – Silicon Monolithic Integrated Circuit

Vo1
INV1
Vo2
INV2
Vo3
INV3
Vo4
INV4
VREF
NON5
REG A
To Control Block
SCP CMOM1,5,6,7
--
-
-
+
2.2V
SS STB1
-
+ ERRCOMP1
VBAT
Start-Up
OSC
+-
+
0.8V
ERRAMP1
CH1 Step up
/down
Current mode
control
STEP UP/DOWN
SELECTOR1
SCPCOMP2
-
+ ^UDSEL1
++-
0.8V _ERRAMP2
SCPCOMP3
-
+
STEP UP/DOWN
SELECTOR2
UDSEL2
CH2 Step up
/down
Current mode
control
++-
0.8V ERRAMP3
SCPCOMP4
-
+
CH3
Step down
Current mode
control
++-
0.8V ERRAMP4
To ERRAMP
STEP UP/DOWN
SELECTOR4
CH4 Step up
/down
Current mode
control
PVCC
U.V.L.O
TIMER
LATCH
S _QR
To Driver
VREGA
VBAT
Pch
DRIVER
PVCC
Nch
DRIVER
Pch
DRIVER
PVCC
Nch
DRIVER
Hx1
BG
CTL _Lx1
PGND12
PVCC
Hx2
BG
CTL _Lx2
Pch
DRIVER
PVCC
Nch
DRIVER
Pch
DRIVER
PVCC
Nch
DRIVER
Hx3
Lx3
Hx4
BG
CTL _Lx4
PGND34
VOLTAGE
REFERENNCE
UDSEL4
VREGA
SS5
ERRAMP5
-
+
PWM COMP5
+-
+
Pch
DRIVER
PVCC5
OUT5
Vo5
Vo6
INV6
Vo7
INV7
INV7I
VREGA
+-
+
0.8V ERRAMP6
VREGA
PWM COMP6
++-
ERRAMP7V
++-
0.8V
7V,7I priority L
++-
0.4V ERRAMP7I
PWM COMP7
+
+
+-
Rood
SW
PVCC
Nch
DRIVER
Rood
SW
PVCC
Nch
DRIVER
HS6H
HS6L
Lx6
PGND567
HS7H
HS7L
OUT7
UVLO
STB
SOFT SS_CLK
START
OSC
ON/OFF
LOGIC
UNREG
2.5～4.2V
Vo1
(Feed Back 1ch)
5.0V
for Analog,IC
Vo2
(Feed Back 2ch)
2.8V
for Digital
Vo3
(Feed Back 3ch)
1.2V
for ASIC
Vo4
(Feed Back 4ch)
3.4V
for Analog
Vo5
(Feed Back 5ch)
-8V
for CCD
Vo6
(Feed Back 6ch)
12V
for CCD
Vo7
(Feed Back 7ch)
LED
INV7I
For BACK LIGHT
VBAT
Fig. 4（2） Application Circuit for Li battery 1cell
※ Note
The following application circuit is recommended. Make sure to confirm its characteristics.
When making changes to the external components, make sure to leave adequate margin
such as static and transitional characteristics, as well as dispersion of the IC.
REV. D
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