bd6709fs ROHM Co. Ltd., bd6709fs Datasheet - Page 27

• Manufacturer Part Number: bd6709fs
• Description: Dc Brushless Motor Drivers For Cooling Fans Speed Controllable Single-phase Full-wave Dc Brushless Fan Motor Drivers
• Manufacturer: ROHM Co. Ltd.

5) High voltage application ＜ BD6718FV ＞
＜ BD6722FS ＞
The absolute maximum rating of Vcc is 15V, while the absolute maximum rating of A1H and A2H terminal voltage is 36V.
Therefore it is possible to make VM line an application with another power supply higher than 15V.
To ensure the absolute maximum rating 36V of A1H and A2H terminal voltage is not exceeded, take physical measures,
such as placing a Zenner diode or a capacitor to create a return route of current between VM line and GND.
The absolute maximum rating of Vcc is 20V, while the absolute maximum rating of A1H, A2H, A1L and A2L terminal
voltage is 34V. Therefore it is possible to make VM line an application with another power supply higher than 20V.
To ensure the absolute maximum rating 34V of A1H, A2H, A1L and A2L terminal voltage is not exceeded, take physical
measures, such as placing a Zenner diode or a capacitor to create a return route of current between VM line and GND.
VREF
COSC
Maximum rating
N.C.
VMIN
CL
Fig.88 High voltage application (BD6722FS)
SEL
VTH
CS
Fig.87
FG
11
AL
12
13
14
15
16
17
18
19
20
Maximum rating
voltage 20V
voltage34V
10
REG
5
6
7
9
OSC
REF
+
-
-
+
High voltage application (BD6718FV)
+
-
Vcc line
Restart
Detect
Lock
Auto
Control
TSD
27/40
Vcc line
+
-
-
+
REG
Hall
Bias
VM line
A1L
Vcc
GND
A1H
A2L
CR
A2H
HB
H+
10
7
4
H-
1
9
8
6
5
3
2
Hall
VM line