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PDF BD6718FV Data sheet ( Hoja de datos )
| Número de pieza | BD6718FV | |
| Descripción | DC Brushless Fan Motor Drivers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BD6718FV (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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TECHNICAL NOTE
DC Brushless Motor Drivers for Cooling Fans
Speed Controllable
Single-phase Full-wave
DC Brushless Fan Motor Drivers
BD6709FS, BD6718FV, BD6721FS, BD6722FS
●Description
This is the summary of models that suit for 12V speed controllable fan for desktop PC and general consumer equipment.
They employ Bi-CDMOS process, and realize low ON resistance, low power consumption. They incorporate lock protection
and automatic restart circuit, current limiting circuit.
●Features
1) Power Tr incorporated (BD6709FS、BD6721FS)
2) Pre-driver compatible for external Tr (BD6718FV)
3) Low side power Tr incorporated half pre-driver (BD6722FS)
4) Current limiting circuit
5) PWM soft switching driver (BD6721FS、BD6722FS)
6) Soft start circuit (BD6722FS)
7) Lock protection and automatic restart circuit
8) Rotating speed pulse signal (FG) output
9) Lock alarm signal (AL) output (BD6718FV、BD6721FS、BD6722FS)
● Application
For 12V fan for desktop PC, server and general consumer equipment
●Lineup
12V speed controllable
single-phase full-wave
Soft switching not available
Soft switching available
Power Tr incorporated BD6709FS
Pre-driver
BD6718FV
Power Tr incorporated BD6721FS
Half pre-driver
BD6722FS
Jan. 2007
1 page  
◎BD6721FS
Parameter
Circuit current
Hall input hysteresis
Output voltage
Lock detection ON time
Lock detection OFF time
FG output low voltage
FG output leak current
AL output low voltage
AL output leak current
OSC low voltage
OSC high voltage
OSC charge current
OSC discharge current
Level amp gain
Level amp output low voltage
Level amp output high voltage
Output ON Duty 1
Output ON Duty 2
Output ON Duty 3
VREF voltage
Current limit voltage
VTH input bias current
VMIN input bias current
Symbol
Limit
Min. Typ. Max.
Icc 4.0 7.0 10.0
VHHYS ±5 ±10 ±15
VO - 0.6 0.9
TON
0.30 0.50 0.70
TOFF 3.0 5.0 7.0
VFGL
- 0.15 0.3
IFGL
-
- 50
VALL
- 0.15 0.3
IALL
-
- 50
VOSCL 0.8 1.0 1.2
VOSCH 2.3 2.5 2.7
ICOSC -50 -32 -26
IDOSC
26
32
50
GLA 50 -
-
VLAOL
-
0.2 0.3
VLAOH
-
1.6 2.0
DUTY1
85
90
95
DUTY2
45
50
55
DUTY3
5
10 15
VREF 2.8 3.0 3.2
VCL 290 310 330
IVTH
-
- 0.2
IVMIN
-
- 0.2
Unit
Conditions
Characteristics
mA Fig.31
mV Fig.32
V
Io=300mA
Upper and Lower total
sec
Fig.33～36
Fig.37
sec Fig.38
V IFG=5mA
Fig.39,40
μA VFG=17V
Fig.41
V IAL=5mA
Fig.39,40
μA VAL=17V
Fig.41
V Fig.42
V Fig.43
μA Fig.44
μA Fig.44
dB -
V-
V
Voltage between LAOUT and
Vcc
VTH=VREF*0.383
% OUT1=Pull up 1kΩ
COSC=470pF
VTH=VREF*0.583
% OUT1=Pull up 1kΩ
COSC=470pF
VTH=VREF*0.783
% OUT1=Pull up 1kΩ
COSC=470pF
-
-
-
-
V IVREF=-2mA
Fig.45
mV Fig.46
μA Fig.47
μA Fig.48
5/40
5 Page 
1.5
BD6721FS
1.5
BD6721FS
10.0
BD6721FS
-40℃
-40℃
25℃
25℃
100℃
100℃
1.0 1.0
1.0
0.5 0.5
0.0
0
0.2 0.4 0.6 0.8
1
OUT1 outflow current, IOUT1 [A]
Fig.49 Low side output Body Di
characteristics
◎BD6722FS
10
BD6722FS
8
6 25℃
-40℃
4 100℃
Operating Voltage Range
2
0
0 5 10 15 20
Supply voltage, Vcc [V]
Fig.52 Circuit current
10.0 BD6722FS
8.0
6.0
4.0
2.0
0.0
0
100℃
25℃
-40℃
5
10 15 20
Output voltage, Vo [V]
Fig.55 High side output leak current
(Temperature characteristics)
0.42 BD6722FS
0.36
100℃
25℃
-40℃
0.30
0.24
Operating Voltage Range
0.18
0
5 10 15 20
Supply voltage, Vcc [V]
Fig.58 Lock detection ON time
0.0
0
0.2 0.4 0.6 0.8
1
OUT1 inflow current, IOUT1 [A]
Fig.50 High side output Body Di
characteristics
20
100℃
15 25℃
-40℃
10
BD6722FS
5
0
-40℃
-5 25℃
100℃
-10
-15 Operating Voltage Range
-20
0
5 10 15
Supply voltage, Vcc [V]
Fig.53 Hall input hysteresis
20
0.1
0.1
1.0 10.0 100.0
Drain current, Ids [A]
Fig.51 Output Tr ASO
（upper and lower total）
（TON=100msec）
15.0 BD6722FS
13.0
25℃
-40℃
11.0
100℃
9.0
7.0
Operating Voltage Range
5.0
0
5 10 15 20
Supply voltage, Vcc [V]
Fig.54 High side output current
1.5 BD6722FS
1.2
0.9
0.6
100℃
25℃
0.3 -40℃
0.0
0
0.3 0.6 0.9 1.2 1.5
Output Current, Io [A]
Fig.56 Low side output voltage
(Voltage characteristics)
8.4 BD6722FS
7.6
6.8
100℃
25℃
-40℃
6.0
5.2
4.4 Operating Voltage Range
3.6
0
5 10 15 20
Supply voltage, Vcc [V]
Fig.59 Lock detection OFF time
11/40
1.5 BD6722FS
1.2
5V
0.9
17V
0.6 12V
0.3
0
0 0.3 0.6 0.9 1.2 1.5
Output current, Io [A]
Fig.57 Low side output voltage
（Voltage characteristics）
10.0 BD6722FS
8.0
6.0
4.0
2.0
0.0
0
100℃
25℃
-40℃
5 10 15
FG/AL voltage, VFG/VAL [V]
Fig.60 FG/AL leak current
20
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD6718FV.PDF ] | |
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