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PDF BD67173NUX Data sheet ( Hoja de datos )
| Número de pieza | BD67173NUX | |
| Descripción | Three-Phase Full-Wave Fan Motor Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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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
Package(s)
VSON010X3030
W(Typ) x D(Typ) x H(Max)
3.00mm x 3.00mm x 0.60mm
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)
SIG
＋
1uF~4.7uF
VCC
10kohm
FG
CTOM
VCC
VCC
10kohm
U
FTR
1pin
M
―
PWM
TOSC
GND
V
Ｗ
2200pF
PWM
〇Product structure : Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
〇This product has no designed protection against radioactive rays
1/27
TSZ02201-0H1H0B101160-1-2
08.Sep.2015 Rev.001
1 page  
BD67173NUX
Electrical Characteristics (Unless otherwise specified VCC=5V Ta=25°C)
Parameter
Symbol Min Typ Max Unit
Conditions
Ref. Data
<OVERALL>
Circuit current STB
ICST - 15 30 uA FR=Open
Fig. 3
Circuit current
ICC 1.8 4.2 6.6 mA
Fig. 4
<PWM>
PWM input H level
VPH 2.5
- VCC V
PWM input L level
VPL 0 - 0.7 V
PWM input current H
IPH - 0 1 uA PWM=VCC
Fig. 5
PWM input current L
IPL -30 -15 - uA PWM=GND
Fig. 6
Input frequency
FPWM
10
-
50 kHz
<FR>
FR input H level
VFRH
2.5
- VCC V FR=H : Normal rotation
FR input L level
VFRL
0
- 0.5 V FR=L; Reverse rotation
FR input current H
IFRH - 0 1 uA FR=VCC
Fig. 7
FR input current L
IFRL -50 -25 - uA FR=GND
Fig. 8
<TOSC >
TOSC frequency
FTOSC
28
40
52 kHz TOSC-GND 2200pF
TOSC charge current
ICTOSC -125 -100
-75
uA TOSC=0.5V
Fig. 9
TOSC discharge current
IDTOSC 75 100 125 uA TOSC=1.0V
Fig. 10
<FG>
FG low voltage
VFGL
- 0.12 0.3 V IFG＝5mA
Fig.11 12
<Output >
Output voltage
PWM off time
VO
tPOFF
- 0.25 0.325 V Io＝250mA (H.L. total)
0.5 1.0 2.0 ms
Fig.13 14
Fig.15 16
Lock protection det. Time
tON 0.7 1.0 1.3 s
Fig. 17
Lock protection rel. time
tOFF 3.3 5.0 8.3 s
Fig 18
About a current item, define the inflow current to IC as a positive notation, and the outflow current from IC as a negative notation.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
5/27
TSZ02201-0H1H0B101160-1-2
08.Sep.2015 Rev.001
5 Page 
BD67173NUX
Description of Function Operation
1. State Transition
Stand-by mode
@ PWM = input L
level
VCC ON
Each State
Rotation judgment 50ms
Forward rotation logic
9times detect
Others
Forward
rotation
Stop
Synchronized Start
Sequence (120°drive)
Forward rotation logic
detect (9times)
Normal driving (150°drive)
Forward rotation logic
No detect ( between 1sec)
Less than 100rpm
More than 100000rpm
Lock mode (Output OFF)
Output OFF: 5s
Figure 21. Flow chart
VCC ON -> Normal driving
100ms/div
Normal driving -> Lock mode
CH1:FG
(10V/div)
CH2:U
(5V/div)
CH3:V
(5V/div)
CH4:W
(5V/div)
Normal driving -> Lock mode -> Re-Start
CH1:FG
(10V/div)
CH2:U
(5V/div)
CH3:V
(5V/div)
CH4:W
(5V/div)
2s/div
LOCK -> TON -> LOCK
TOFF -> Re-Start
Normal driving
Motor LOCK
50ms/div
by hand
LOCK
LOCK
200ms/div
TON
Re-Start
50ms/div
CH1:FG
(10V/div)
CH2:U
(5V/div)
CH3:V
(5V/div)
CH4:W
(5V/div)
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
11/27
TSZ02201-0H1H0B101160-1-2
08.Sep.2015 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD67173NUX.PDF ] | |
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