bd9745ekn ROHM Co. Ltd., bd9745ekn Datasheet - Page 9

• Manufacturer Part Number: bd9745ekn
• Description: 7-channel Switching Regulator Controller For Digital Camera
• Manufacturer: ROHM Co. Ltd.

※ 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.
Vo2
Vo3
Vo1
Vo4
Vo6
Vo7
Vo5
VREF
INV7I
INV1
INV3
INV4
INV6
INV7
INV2
NON5
To ERRAMP
REFERENNCE
UVLO
VOLTAGE
STB
SCPCOMP3
SCPCOMP4
SS5
Fig. 4（2） Application Circuit for Li battery 1cell
SCPCOMP2
-
+
-
+
0.8V
0.8V
0.8V
0.8V
0.8V
0.4V
0.8V
START
-
+
SOFT
ERRAMP5
ERRAMP7V
ERRAMP7I
STEP UP/DOWN
ERRAMP6
-
+
SS
+ -
+
UDSEL1
ERRAMP2
ERRAMP3
ERRAMP4
STEP UP/DOWN
STEP UP/DOWN
UDSEL4
+ -
+
+ -
+
+ -
+
SELECTOR1
+ -
+
+ -
+
+ -
+
SELECTOR4
-
+
SELECTOR2
SS_CLK
ERRAMP1
ERRCOMP1
UDSEL2
STB1
VREGA
VREGA
VREGA
7V,7I priority L
OSC
REG A
To Control Block
SCP CMOM1,5,6,7
2.2V
-
-
-
-
+
Start-Up
VBAT
OSC
PWM COMP5
PWM COMP6
PWM COMP7
/down
Current mode
control
/down
Current mode
control
+ -
+
+ -
+
+
+
+
-
CH1 Step up
CH2 Step up
CH3
Step down
Current mode
control
CH4 Step up
/down
Current mode
control
ON/OFF
REV. D
LOGIC
PVCC
DRIVER
PVCC
PVCC
DRIVER
DRIVER
DRIVER
DRIVER
PVCC
DRIVER
PVCC
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
PVCC
Rood
Rood
Pch
Nch
Pch
Nch
Pch
Nch
Pch
Nch
Pch
PVCC
Nch
Nch
SW
SW
S
U.V.L.O
TIMER
LATCH
To Driver
Q
R
CTL
CTL
CTL
BG
BG
BG
OUT5
PGND567
OUT7
Lx1
Hx1
PGND34
VREGA
VBAT
HS6H
Lx3
Hx4
Lx4
PVCC5
HS6L
Lx6
HS7H
PGND12
PVCC
Hx2
Lx2
Hx3
HS7L
VBAT
For BACK LIGHT
Vo2
(Feed Back 2ch)
Vo5
(Feed Back 5ch)
Vo6
(Feed Back 6ch)
Vo3
(Feed Back 3ch)
Vo4
(Feed Back 4ch)
for Analog,IC
INV7I
(Feed Back 1ch)
Vo1
Vo7
(Feed Back 7ch)
for Analog
for Digital
for ASIC
2.5～4.2V
for CCD
for CCD
UNREG
LED
2.8V
1.2V
3.4V
5.0V
-8V
12V
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