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Rohm Semiconductor Electronic Components Datasheet

BD6326NUX Datasheet

Three-Phase Full-Wave Fan Motor Driver

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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 structureSilicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/22
TSZ02201-0H1H0B100530-1-2
11. Dec. 2014 Rev.002


Rohm Semiconductor Electronic Components Datasheet

BD6326NUX Datasheet

Three-Phase Full-Wave Fan Motor Driver

No Preview Available !

BD6326NUX
Pin Configuration
(TOP VIEW)
FG
COM
VCC
U
FR
PWM
TOSC
GND
V
W
Figure 1. Pin configuration
Datasheet
Pin Description
P/No.
1
2
3
4
5
6
7
8
9
10
T/name
FG
COM
VCC
U
FR
W
V
GND
TOSC
PWM
Function
FG output terminal
Coil midpoint terminal
Power supply terminal
U phase output terminal
Motor rotation direction select terminal
W phase output terminal
V phase output terminal
GND terminal
Start-up oscillation terminal
PWM signal input terminal
Block Diagram
TSD
1 FG
2 COM
UVLO
SIGNAL
OUTPUT
BEMF
COMP.
3 VCC
4U
OSC
VREG
CONTROL
LOGIC
DUTY
CONTROL
PWM 10
TOSC
CS
COMP.
TOSC 9
VCS
PRE-
DRIVER
GND 8
V7
5 FR
W6
Figure 2. Block diagram
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/22
TSZ02201-0H1H0B100530-1-2
11. Dec. 2014 Rev.002


Part Number BD6326NUX
Description Three-Phase Full-Wave Fan Motor Driver
Maker ROHM
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BD6326NUX Datasheet PDF






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