Datasheet
DC Brushless Fan Motor Driver
5V Single-phase Full-wave
Fan motor driver
BD6966NUX
●Description
This is the summary of application for BD6966NUX that suit for notebook PC cooling fan motor. They employ Bi-CMOS
process and realize low ON resistor, and low power consumption and quiet drive.
●
Features
Small and thin package (VSON10 thickness:0.6mm)
BTL soft switching drive
PWM speed control
Low duty start up function and enable/disable
selectable
Quick start function
Stand-by function
Constant voltage output for hall element
Lock protection and auto restart
(without external capacitor)
Rotating speed pulse signal (FG) output
●
Applications
Compact 5V fan such as notebook PC cooling fan
●Absolute
maximum ratings
●
Package(s)
VSON010X3030
W(Typ.) x D(Typ.) x H(Max.)
3.00mm x 3.00mm x 0.60mm
VSON010X3030
Parameter
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Output voltage
Output current
FG signal output voltage
FG signal output current
Hall bias output current
Junction temperature
*
**
Symbol
Vcc
Pd
Topr
Tstg
Vomax
Iomax
Vfg
Ifg
Ihb
Tjmax
Limit
7
580*
-40 to +105
-55 to +150
7
1000**
7
10
10
150
Unit
V
mW
ºC
ºC
V
mA
V
mA
mA
ºC
2
Reduce by 4.64mW/℃ over Ta=25ºC(On 74.2mm×74.2mm×1.6mm glass epoxy board, Copper foil area 6.28mm )
This value is not to exceed Pd
●Operating
conditions
Parameter
Operating supply voltage range
Hall input voltage range
Symbol
Vcc
Vh
Limit
1.8 to 5.5
0.4 to Vcc-1.1
Unit
V
V
○Product
structure：Silicon monolithic integrated circuit
○This
product is not designed protection against radioactive rays
.
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TSZ22111・14・001
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Rev.001
BD6966NUX
●Electrical
characteristics(Unless
otherwise specified Ta=25℃,Vcc=5V)
Parameter
Circuit current 1
Circuit current 2
(Stand-by mode)
Hall bias voltage
Input offset voltage
PWM input H level
PWM input L level
Symbol
Icc1
Icc2
Vhb
Vofs
Vpwmh
Vpwml
Ipwmh
PWM input current
Ipwml
PWM input frequency
SEL input L level
Output voltage
Input-output Gain
FG hysteresis voltage
FG low voltage
FG leak current
Lock detection ON time
Lock detection OFF time
Fpwm
Vsell
Vo
Gio
Vhys
Vfgl
Ifgl
Ton
Toff
-33
2
-0.3
-
43
±5
-
-
0.35
3.5
-25
-
-
0.4
44.5
±10
0.12
-
0.50
5.0
-17
50
0.8
0.6
46
±15
0.3
10
0.65
6.5
μA
kHz
V
V
dB
mV
V
μA
s
s
Ifg=5mA
Vfg=7V
SEL=L
Start duty assist ON
Io=300mA
Upper and Lower total
PWM=GND
Limits
Min.
1
15
0.9
0
2.5
-0.3
-
Typ.
3
25
1.0
-
-
-
0
Max.
6
35
1.1
±6
Vcc+0.3
0.8
-
Unit
mA
uA
V
mV
V
V
μA
PWM=Vcc
Conditions
PWM=OPEN
PWM=GND
Ihb=-3mA
Datasheet
Characteristics
Fig.1
Fig.2
Fig.3
-
-
-
-
-
Fig.4 to 7
-
Fig.8
Fig.9,10
-
Fig.11
Fig.12
●
Truth table
H+
H
L
H
L
H-
L
H
L
H
PWM
H(OPEN)
H(OPEN)
L
L
OUT1
H
L
L
L
OUT2
L
H
L
L
FG
H(Output Tr：OFF)
L(Output Tr：ON)
H(Output Tr：OFF)
L(Output Tr：ON)
* FG=H at stand-by mode
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BD6966NUX
●Reference
data
6
50
Datasheet
1.6
5
Hall bias voltage. Vhb [V]
Circuit current,Icc1 [mA]
40
Circuit current,Icc2 [uA]
1.2
105℃
25℃
-40℃
4
105℃
25℃
-40℃
105℃
30
25℃
-40℃
3
0.8
20
2
1
Operating Voltage Range
10
Operating Voltage Range
0.4
0
1.5
2.5
3.5
4.5
5.5
0
1.5
2.5
3.5
4.5
5.5
0.0
0
2
4
6
8
10
Supply voltage, Vcc [V]
Supply voltage, Vcc[V]
Hall bias current, Ihb [mA]
Fig.1 Circuit current 1
Fig.2 Circuit current 2
Fig.3 Hall bias voltage
1.0
1.0
1.0
0.8
0.8
0.8
Output L voltage [V]
Output H voltage [V]
Output L voltage [V]
105℃
0.6
1.8V
5V
5.5V
0.6
25℃
-40℃
0.6
1.8V
5V
5.5V
0.4
0.4
0.4
0.2
0.2
0.2
0.0
0
0.2
0.4
0.6
0.8
1
0.0
0
0.2
0.4
0.6
0.8
1
0.0
0
0.2
0.4
0.6
0.8
1
Output current, Io [A]
Output current, Io [A]
Output current, Io [A]
Fig.4 Output L voltage
(Voltage characteristics)
15
Fig.5 Output L voltage
(Temperature characteristics)
1.0
Fig.6 Output H voltage
(Voltage characteristics)
1.0
105
℃
FG hysteresis voltage, Vhys[mV]
0.8
10
25
℃
-40
℃
0.8
25℃
5
Operating Voltage Range
0
0.6
-40℃
FG low voltage, Vfgl [ V]
Output H voltage [V]
105℃
0.6
1.8V
0.4
0.4
-5
-40
℃
-10
25
℃
105
℃
5V
0.2
0.2
5.5V
0.0
0
0.2
0.4
0.6
0.8
1
-15
1
2
3
4
5
6
0.0
0
2
4
6
8
10
Output current, Io [A]
Supply volt age, Vcc[V]
F G current, Ifg [mA]
Fig.7 Output H voltage
(Temperature characteristics)
1.0
Fig.8 FG hysteresis voltage
Fig.9 FG output L voltage
(Voltage characteristics)
10.0
1.0
0.8
0.8
Lock detection OFF time, Toff [s]
Lock detection ON time, Ton [s]
8.0
FG low voltage, Vfgl [ V]
0.6
-40℃
0.6
25℃
105℃
-40℃
6.0
25℃
105℃
0.4
0.4
4.0
105℃
25℃
0.2
0.2
Operating Voltage Range
2.0
Operating Voltage Range
-40℃
0.0
0
2
4
6
8
10
0.0
1.5
2.5
3.5
4.5
5.5
0.0
1.5
2.5
3.5
4.5
5.5
FG current, Ifg [mA]
Supply voltage, Vcc [V]
Supply voltage, Vcc [V]
Fig.10 FG output L voltage
(Temperature characteristics)
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© 2012 ROHM Co., Ltd. All rights reserved.
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Fig.11 Lock detection ON time
Fig.12 Lock detection OFF time
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TSZ02201-0H1H0B100140-1-2
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Rev.001
BD6966NUX
●Block
diagram, application circuit, and pin assignment
Datasheet
Setting enable or disable of
low duty start up function
P.7
OU T2
M
GN D
1
OSC
Lock
Protection
+
-
-
+
10
Take a measure against
VCC voltage rise due to
revers e connection of
power supply and back
electromotive force
P.9
Incorporates soft switching
function. Adjust at an
optimum value because
gradient of switching of
output waveform depends on
hall element output.
P.5
SEL
OU T1
2
9
VC C
H+
3
HB
Control
TSD
V cc
8
PWM
2 00kΩ
HALL
0Ω to
500Ω
4
VREG
+
-
7
H-
FG
5
6
Speed control by
PWM input is enabled.
Input frequency must
be 50kHz at the
maximum
P.7
This is an open drain
output. Connect a
pull-up resistor.
P.10
OSC : Internal reference oscillation circuit
TSD : Thermal shut down(heat rejection circuit)
PIN No.
1
2
3
4
5
6
7
8
9
10
Terminal name
OUT2
SEL
H+
HB
H-
FG
PWM
Vcc
OUT1
GND
Function
Motor output terminal 2
Low duty start up function selecting terminal
Hall input terminal+
Hall bias terminal
Hall input terminal-
FG signal output terminal
PWM signal input terminal
Power supply terminal
Motor output terminal 1
GND terminal
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TSZ02201-0H1H0B100140-1-2
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BD6966NUX
●
Description of operations
Datasheet
1) Lock protection and automatic restart circuit
Motor rotation is detected by hall signal, and lock detection ON time (Ton) and lock detection OFF time (Toff) are set
by IC internal counter. External part (C or R) is not required. Timing chart is shown in Fig.13.
Idling
H+
OUT1
Toff
Ton
OUT2
Output Tr OFF
ON
FG
Motor
locking
Lock
detection
Depends on hall signal
(L in this figure)
Lock
release
Recovers normal
operation
Fig.13 Lock protection timing chart
2) Soft switching function (silent drive setting)
Input signal to hall amplifier is amplified to produce an output signal.
When the hall element output signal is small, the gradient of switching of output waveform is gentle; When it is large,
the gradient of switching of output waveform is steep. Gain of 44.5dB (170 times) is provided between input and
output, therefore enter an appropriate hall element output to IC where output waveform swings sufficiently.
(H+)-(H-)
OUT1
Fig.14 Relation between hall element output amplitude and output waveform
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/12
TSZ02201-0H1H0B100140-1-2
5.Jul.2012
Rev.001
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