Datasheet
DC Brushless Fan Motor Drivers
Three-Phase Full-Wave
Fan Motor Driver
BD67173NUX
General Description
BD67173NUX is a three-phase sensorless fan motor
driver used to cool off notebook PCs. It is controlled by a
variable speed provided through the PWM input signal.
Its feature is sensorless drive which doesn’t require a
hall device as a location detection sensor and motor
downsizing can be achieved by limiting the number of
external components as much as possible.
Furthermore, introducing a direct PWM soft switched
driving mechanism achieves silent operations and low
vibrations.
Key Specifications
Operating Supply Voltage Range: 2.2V to 5.5V
Operating Temperature Range: -25°C to +95°C
W(Typ) x D(Typ) x H(Max)
3.00mm x 3.00mm x 0.60mm
Package(s)
VSON010X3030
Features
Speed controllable by PWM input signal
Sensorless drive
Soft switched drive Quick start
Power save function
Internal RNF resistance
Quick start function
VSON010X3030
Applications
Small fan motor for notebook PCs etc.
Typical Application Circuit(s)
VCC
10kohm
SIG
FG
COM
T
1pin
PWM
TOSC
GND
V
PW M
2200pF
＋
VCC
VCC
U
10kohm
1uF~4.7uF
FR
T
Ｗ
M
―
〇Product
structure : Silicon monolithic integrated circuit
.
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〇This
product has no designed protection against radioactive rays
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BD67173NUX
Contents
General Description ......................................................................................................................................................1
Features ........................................................................................................................................................................1
Applications...................................................................................................................................................................1
Key Specifications .........................................................................................................................................................1
Package(s)
W(Typ) x D(Typ) x H(Max) .....................................................................................................1
Typical Application Circuit(s) .........................................................................................................................................1
Pin Configuration(s) ......................................................................................................................................................3
Pin Description(s) .........................................................................................................................................................3
Block Diagram(s) ..........................................................................................................................................................3
Absolute Maximum Ratings (Ta = 25°C).......................................................................................................................4
Recommended Operating Conditions (Ta= -25°C to +95°C) ........................................................................................4
Electrical Characteristics (Unless otherwise specified V
CC
=5V Ta=25°C) ....................................................................5
Typical Performance Curves.........................................................................................................................................6
Application circuit example (Constant values are for reference) ................................................................................10
Power Dissipation .......................................................................................................................................................21
Operational Notes .......................................................................................................................................................23
Marking Diagrams .......................................................................................................................................................26
Physical Dimension, Tape and Reel Information ........................................................................................................27
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BD67173NUX
Pin Configuration
(TOP VIEW)
FG
COM
VCC
U
FR
Figure 1. Pin Configuration
1
2
PWM
TOSC
GND
V
W
Pin Description(s)
Pin No.
1
2
3
4
5
6
7
8
9
10
Pin Name
FG
COM
VCC
U
FR
W
V
GND
TOSC
PWM
FG output pin
Coil midpoint pin
Power supply pin
U phase output pin
Motor rotation direction select pin
W phase output pin
V phase output pin
GND pin
Start-up oscillation pin
PWM signal input pin
Function
Block Diagram
TSD
UVLO
OSC
VREG
1
FG
SIGNAL
OUTPUT
BEMF
COMP.
CONTROL
LOGIC
DUTY
CONTROL
PWM
10
TOSC
2
COM
CS
COMP.
VCS
TOSC
9
3
VCC
PRE-
DRIVER
GND
8
4
U
V
7
5
FR
W
6
Figure 2. Block Diagram
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TSZ02201-0H1H0B101160-1-2
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BD67173NUX
Absolute Maximum Ratings (Ta = 25°C)
Parameter
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Output voltage
Output current
FG signal output voltage
FG signal output current
Junction temperature
*1
*2
Symbol
VCC
Pd
Topr
Tstg
Vomax
Iomax
VFG
IFG
Tj
Limit
7
0.58 *1
–25 to +95
–55 to +150
7
700*2
7
10
150
Unit
V
W
°C
°C
V
mA
V
mA
°C
Reduce by 4.64mW/°C over Ta=25°C. (On 74.2mm×74.2mm×1.6mm glass epoxy board)
This value is not to exceed Pd
Recommended Operating Conditions (Ta= -25°C to +95°C)
Parameter
Operating supply voltage range
Input voltage range(PWM, FR )
Symbol
V
CC
V
IN
Min
2.2
0
Typ
5
-
Max
5.5
VCC
Unit
V
V
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BD67173NUX
Electrical Characteristics (Unless otherwise specified V
CC
=5V Ta=25°C)
Parameter
<OVERALL>
Circuit current STB
Circuit current
<PWM>
PWM input H level
PWM input L level
PWM input current H
PWM input current L
Input frequency
<FR>
FR input H level
FR input L level
FR input current H
FR input current L
<TOSC >
TOSC frequency
TOSC charge current
TOSC discharge current
<FG>
FG low voltage
<Output >
Output voltage
PWM off time
Lock protection det. Time
Lock protection rel. time
V
O
t
POFF
t
ON
t
OFF
-
0.5
0.7
3.3
0.25
1.0
1.0
5.0
0.325
2.0
1.3
8.3
V
ms
s
s
Fig. 17
Fig 18
Io＝250mA (H.L. total)
Fig.13 14
Fig.15 16
V
FGL
-
0.12
0.3
V
IFG＝5mA
Fig.11 12
F
TOSC
I
CTOSC
I
DTOSC
28
-125
75
40
-100
100
52
-75
125
kHz
uA
uA
TOSC-GND 2200pF
TOSC=0.5V
TOSC=1.0V
Fig. 9
Fig. 10
V
FRH
V
FRL
I
FRH
I
FRL
2.5
0
-
-50
-
-
0
-25
VCC
0.5
1
-
V
V
uA
uA
FR=H : Normal rotation
FR=L; Reverse rotation
FR=VCC
FR=GND
Fig. 7
Fig. 8
V
PH
V
PL
I
PH
I
PL
F
PWM
2.5
0
-
-30
10
-
-
0
-15
-
VCC
0.7
1
-
50
V
V
uA
uA
kHz
PWM=VCC
PWM=GND
Fig. 5
Fig. 6
I
CST
I
CC
-
1.8
15
4.2
30
6.6
uA
mA
FR=Open
Fig. 3
Fig. 4
Symbol
Min
Typ
Max
Unit
Conditions
Ref. Data
About a current item, define the inflow current to IC as a positive notation, and the outflow current from IC as a negative notation.
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