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PDF BD6326NUX Data sheet ( Hoja de datos )
| Número de pieza | BD6326NUX | |
| Descripción | Three-Phase Full-Wave Fan Motor Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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DC Brushless Fan Motor Drivers
Three-Phase Full-Wave
Fan Motor Driver
BD6326NUX
General description
BD6326NUX 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.
Features
Speed controllable by PWM input signal
180° Sinusoidal drive
Power save function
Internal RNF resistance
Motor rotation direction select function(FR)
Package
VSON010X3030
W(Typ) x D(Typ) x H(Max)
3.00mm x 3.00mm x 0.60mm
VSON010X3030
Application
Small fan motor notebook PCs etc.
Absolute maximum ratings
Parameter
Symbol
Limit
Unit
Supply voltage
Power dissipation (NOTE 1)
VCC 7 V
Pd 0.58 W
Operating temperature
Topr
–25 to +95
°C
Storage temperature
Tstg
–55 to +150
°C
Output voltage
Output current(NOTE 2)
Vomax
Iomax
7
700
V
mA
FG signal output voltage
VFG 7 V
FG signal output current
IFG 6 mA
Junction temperature
Tjmax 150 °C
(NOTE 1) Reduce by 4.64mW/°C over Ta=25°C. (On 74.2mm×74.2mm×1.6mm glass epoxy board)
(NOTE 2) This value is not to exceed Pd.
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the
absolute maximum ratings.
Recommended operating condition
Parameter
Operating supply voltage range
Input voltage range(PWM, FR terminals)
Symbol
VCC
VINx
Limit
2.2 to 5.5
0 to VCC
Unit
V
V
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/22
TSZ02201-0H1H0B100530-1-2
11. Dec. 2014 Rev.002
1 page  
BD6326NUX
Typical Performance Curves 2
(Reference data)
Datasheet
0
-25
Operating range
-50
-75
-100
-125
95°C
25°C
–25°C
-150
01 2345 67
Supply voltage: VCC [V]
Figure 7. TOSC charge current
150
Operating range
125
–25°C
100 25°C
95°C
75
50
25
0
0 12 3 4 5
Supply voltage: VCC [V]
Figure 8. TOSC discharge current
6
7
0.5
0.4
0.3
95°C
0.2 25°C
–25°C
0.1
0
01234567
Output sink current: IO [mA]
Figure 9. FG low voltage (VCC=5V)
0.5
0.4
0.3
2.2V
5V
0.2 5.5V
0.1
0
0 1 2 34 5 6
Output sink current: IO [mA]
Figure 10. FG low voltage (Temp=25℃)
7
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/22
TSZ02201-0H1H0B100530-1-2
11. Dec. 2014 Rev.002
5 Page 
BD6326NUX
Datasheet
2) UVLO (Under voltage lock out circuit)
In the operation area under the guaranteed operating power supply voltage of 2.2 V (Typ), the transistor on the output can
be turned OFF at a power supply voltage of 1.73V (Typ). A hysteresis width of 270mV is provided and a normal operation
can be performed at 2.0V. This function is installed to prevent unpredictable operations, such as a large amount of current
passing through the output, by means of intentionally turning OFF the output during an operation at a very low power
supply voltage which may cause an abnormal function in the internal circuit.
3) Lock Protection Feature (motor stop at start-up), Automatic Recovery Circuit
To prevent passing a coil current on any phase when a motor is locked, it is provided with a function which can turn OFF
the output for a certain period of time and then automatically restore itself to the normal operation. During the motor
rotation, an appropriate logic based on the induced electromotive voltage can be continuously given to each phase; on the
other hand, when the motor is locked at, no induced electromotive voltage is obtained. Utilizing this phenomenon to take a
protective against locking, when the induced electromotive voltage is not detected for a predetermined period of time
(TON: 0.9sec(Typ)), it is judged that the motor is locked and the output is turned OFF for a predetermined period of time
(TOFF: 5.0sec(Typ)).
Moreover, if Synchronized driving doesn't change into Rotational speed monitor section between TON (0.9sec(Typ)) at start-up, it
is judged that the motor is locked. The timing chart is shown (Figure 22).
Induced electromotive
voltage detection
Output
FG
Motor-restart
Motor-Lock
Motor-restart
TOFF
OFF
Not
detecting
TON
ON
TOFF
OFF
FG = Hi
FG fixed Hi during motor lock
Not
detecting
TON
ON
BD6326NUX:
Motor Lock detect
at Start-up
・Lock on detect time
TON = 0.9sec (Typ)
・motor lock time
TOFF = 5.0sec (Typ)
Condition)
a) motor stops
b) Failure of BEMF
detection 15times
successively until
0.9sec
Figure 22. Lock protection operation
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/22
TSZ02201-0H1H0B100530-1-2
11. Dec. 2014 Rev.002
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet BD6326NUX.PDF ] | |
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