bd9745ekn ROHM Co. Ltd., bd9745ekn Datasheet - Page 7

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

35.NON5
34.VREF
37.INV7I
26.INV1
25.INV2
27.INV3
28.INV4
36.INV6
38.INV7
To ERRAMP
REFERENNCE
UVLO
SCP COMP4
VOLTAGE
STB
SCPCOMP3
SS5
SCPCOMP2
-
+
-
+
0.8V
0.8V
0.8V
0.8V
0.8V
0.4V
START
0.8V
-
+
SOFT
ERRAMP7I
STEP UP/DOWN
ERRAMP5
ERRAMP7V
-
+
ERRAMP6
+ -
+
STEP UP/DOWN
SS
STEP UP/DOWN
ERRAMP2
ERRAMP3
ERRAMP4
SELECTOR1
+ -
+
UDSEL4
+ -
+
+ -
+
+ -
+
+ -
+
+ -
+
SELECTOR2
SELECTOR4
-
+
SS_CLK
UDSEL1
ERRCOMP1
ERRAMP1
UDSEL2
STB1
VREGA
VREGA
VREGA
Fig. 3 Block diagram
7V,7I priority L
OSC
REG A
To Control Block
SCP CMOM1,5,6,7
2.2V
-
-
-
-
+
Start-Up
REV. D
VBAT
OSC
PWM COMP5
PWM COMP6
PWM COMP7
Current mode
Current mode
Current mode
Current mode
CH1 Step up
/down
control
CH2 Step up
/down
control
+ -
+
+ -
+
+
+
+
-
CH3
Step down
control
CH4 Step up
/down
control
ON/OFF
LOGIC
PVCC
PVCC
DRIVER
DRIVER
DRIVER
PVCC
DRIVER
DRIVER
PVCC
DRIVER
PVCC
DRIVER
DRIVER
DRIVER
DRIVER
DRIVER
Rood
Rood
PVCC
Nch
PVCC
Pch
Pch
Nch
Pch
Nch
Pch
Nch
Pch
Nch
Nch
SW
SW
S
U.V.L.O
LATCH
To Driver
TIMER
Q
R
CTL
BG
CTL
CTL
BG
BG
30.VREGA
22.VBAT
14.Hx1
15-16.Lx1
17-18.PGND12
21.PVCC
20.Hx2
19.Lx2
9.Hx3
8.Lx3
4.Hx4
5.Lx4
6-7.PGND34
2.PVCC5
1.OUT5
46.HS6H
45.HS6L
44.Lx6
43.PGND567
40.HS7H
41.HS7L
42.OUT7
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