Datasheet
DC Brushless Fan Motor Driver
5V Single-phase Full-wave
Fan Motor Driver
BU6906NUX
●Package(s)
VSON008X2030
●General Description
The BU6906NUX is a 5V single-phase full-wave FAN
motor driver with built in HALL element. This is a DC
brushless FAN motor driver series.
That has compact package, auto gain control function
(Henceforth, abbreviated to AGC), silent drive by soft
switching, and low battery consumption by standby
function.
This is the best lineup for note PC cooling FANs.
●Features
Built in HALL element.
Auto Gain Control function (AGC).
Soft switching drive (PWM type)
Low PWM duty start up
Quick start function
Stand-by mode
Incorporating lock protection and automatic restart
circuit.
Compact package
Rotating speed pulse signal (FG) output
PWM speed control
W(Typ.) x D(Typ.) x H(Max.)
2.00mm x 3.00mm x 0.60mm
VSON008X2030
●Applications
For compact 5V FAN such as notebook PC cooling FAN
●Absolute Maximum Ratings
Parameter
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Output voltage
Output current
FG signal output voltage
FG signal output current
Junction temperature
*
**
Symbol
Vcc
Pd
Topr
Tstg
Vomax
Iomax
Vfg
Ifg
Tjmax
Limit
7
410*
-40 to +85
-55 to +125
7
800**
7
10
125
Unit
V
mW
℃
℃
V
mA
V
mA
℃
Limit
1.8 to 5.5
Unit
V
Reduce by 4.1mW/℃ over 25℃. (70.0mm×70.0mm×1.6mm glass epoxy board)
This value is not to exceed Pd.
●Operating Rating
Parameter
Operating supply voltage range
Symbol
Vcc
○Product structure:Silicon monolithic integrated circuit
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TSZ22111・14・001
○This product is not designed protection against radioactive rays
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31.Jul.2012 Rev.002
Datasheet
BU6906NUX
●Block Diagram
Take a measure against
voltage rise due to reverse
connection of power supply
and back electromotive force.
Page 13.
HALL ELEMENT
Vcc
OFFSET
CANCEL
1
2
UVLO
3
TSD
Page 14.
8
FG
7
CONTROL
LOGIC
PWM
This is an open drain output.
Connect a pull-up resistor.
A/D
CONVERSION
OSCILLATOR
CIRCUIT
VM
Speed control by PWM input is
enabled. Input frequency must
be 50kHz at the maximum.
GND
PRE
DRIVER
H-BRIDGE
OUT1
6
Page 9.
OUT2
PGND
PWM DUTY
4
5
LOCK
PROTECTION
SIGNAL OUT
M
Conventional FAN motor driver IC with HALL IC needs adjusting
HALL bias resistor due to vary factor about HALL amplitude.
This IC automatically controls HALL amplitude. The result
doesn’t need adjusting HALL amplitude by built in HALL element
and unique AGC function.
Page 8.
TSD : Thermal shut down(heat rejection circuit)
UVLO :Under voltage lock outputs (low voltage protection circuit)
Figure 1. Block diagram and application circuit
●Pin Description
P/No.
1
2
3
4
5
6
7
8
T/Name
Vcc
VM
PWM
OUT2
PGND
OUT1
FG
GND
●I/O truth table
・Supply magnetic direction (positive)
Function
Power supply terminal 1
Power supply terminal 2
PWM signal input terminal
Motor output terminal 2
Ground terminal 2
Motor output terminal 1
FG signal output terminal
Ground terminal 1
・Output operation
S
Vout1
Vout2
Marking
Bhys
Brev
Bhys
Bfwd
Brev
Magnetic flux density: B
N
Bfwd
Magnetic flux density: B
Figure 2. Output operation
Supply magnetic
direction
S
N
S
N
PWM*
OUT1
OUT2
FG
H(OPEN)
H(OPEN)
L
L
L
H
L
L
H
L
L
L
H (Tr:OFF)
L (Tr:ON)
H (Tr:OFF)
H (Tr:OFF)
*When PWM terminal is input L, IC state changes stand-by mode. FG terminal is H constant in stand-by mode
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Datasheet
BU6906NUX
●Electrical Characteristic(s) (Unless otherwise specified Ta=25℃,Vcc=5V)
Limit
Parameter
Symbol
MIN TYP MAX
Circuit current 1
Icc1
2
4
Circuit current 2
Icc2
50
(stand-by mode)
Magnetic switch-point for
Bfwd
1.5
forward rotation
Magnetic switch-point for
Brev
-1.5
reverse rotation
Magnetic hysteresis
Bhys
3.0
5.0
PWM input H level
Pwmh
2.5
Vcc
PWM input L level
Pwml
0
0.7
PWM Input frequency
Pwmf
5
50
Unit
PWM=OPEN
Figure 3.
uA
PWM=GND
Figure 4.
mT
Figure 5.
mT
Figure 6.
mT
V
V
kHz
Figure 7.
-
Vo
-
0.16
0.24
V
FG low voltage
FG leak current
Lock detection ON time
Lock detection OFF time
Vfgl
Ifgl
Ton
Toff
0.35
3.5
0.50
5.0
0.4
5
0.65
6.5
V
µA
s
s
3/16
Characteristics
mA
Output voltage
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TSZ22111・15・001
Conditions
Io=200mA
Upper and Lower total
Ifg=5mA
Vfg=7V
Figure 8 to 13.
Figure 14,15.
Figure 16.
Figure 17.
Figure 18.
TSZ02201-0H1H0B100090-1-2
31.Jul.2012 Rev.002
Datasheet
BU6906NUX
●Typical Performance Curves 1
4.0
100
Circuit corrent : Icc2 [uA]
Circuit current : Icc1 [mA]
80
3.0
85℃
25℃
-40℃
2.0
1.0
60
40
85℃
25℃
-40℃
20
Operating Voltage Range
Operating voltage range
0.0
0
1
2
3
4
5
Supply voltage : Vcc [V]
6
1
2.5
2.0
1.5
85℃
25℃
-40℃
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
Operating
OperatingVoltage
voltage Range
range
-2.5
1
2
3
4
5
Supply voltage : Vcc [V]
6
6
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
85℃
25℃
-40℃
-1.0
-1.5
-2.0
OperatingVoltage
voltage Range
range
Operating
-2.5
1
Figure 5. Magnetic switch-point for forward rotation
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3
4
5
Supply voltage : Vcc [V]
Figure 4. Circuit current 2 (Stand-by mode)
Magnetic switch-point for reverse rotation : Brev [mT]
Magnetic switch-point for forward rotation : Bfwd [mT]
Figure 3. Circuit current 1
2
2
3
4
5
Supply voltage : Vcc [V]
6
Figure 6. Magnetic switch-point for reverse rotation
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Datasheet
BU6906NUX
●Typical Performance Curves 2
1.0
2.5
85℃
2.0
25℃
0.8
Output H voltage : Voh [V]
Magnetic hysteresis : Bhys [mT]
3.0
-40℃
1.5
1.0
0.6
0.4
85℃
25℃
-40℃
0.2
0.5
Operating Voltage Range
0.0
0.0
1
2
3
4
5
Supply voltage : Vcc [V]
6
0.0
1.0
0.8
0.8
Output L voltage : Vol [V]
Output H voltage : Voh [V]
1.0
1.8V
0.4
5.0V
5.5V
0.2
0.4
0.6
Output current : Io [A]
0.8
Figure 8. Output H voltage
(Temperature characteristics)
Figure 7. Magnetic hysteresis
0.6
0.2
0.6
85℃
0.4
25℃
-40℃
0.2
0.0
0.0
0.0
0.2
0.4
0.6
Output current : Io [A]
0.8
Figure 9. Output H voltage
(Voltage characteristics)
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0.0
0.2
0.4
0.6
Output current : Io [A]
0.8
Figure 10. Output L voltage
(Temperature characteristics)
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Datasheet
BU6906NUX
●Typical Performance Curves 3
1.0
1.0
1.8V
0.8
Output voltage : Vo [V]
Output L voltage : Vol [V]
0.8
0.6
0.4
5.0V
85℃
25℃
0.6
-40℃
0.4
5.5V
0.2
0.2
0.0
0.0
0.0
0.2
0.4
0.6
Output current : Io [A]
0.8
0.0
Figure 11. Output L voltage
(Voltage characteristics)
0.2
0.4
0.6
Output current : Io [A]
0.8
Figure 12. Output voltage (Upper and lower total)
(Temperature characteristics)
0.5
1.0
1.8V
FG output L voltage : Vfgl [V]
Output voltage : Vo [V]
0.8
5.0V
0.6
5.5V
0.4
0.4
25℃
-40℃
0.2
0.2
0.1
0.0
0.0
0.0
0.2
0.4
0.6
Output current : Io [A]
0.8
Figure 13. Output voltage (Upper and lower total)
(Voltage characteristics)
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85℃
0.3
0
2
4
6
FG current : Ifg [mA]
8
10
Figure 14. FG output L voltage
(Temperature characteristics)
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Datasheet
BU6906NUX
●Typical Performance Curves 4
0.5
2.0
0.4
FG leak current : Ifgl [uA]
FG output L voltage : Vfgl [V]
1.8V
0.3
5.0V
5.5V
0.2
1.5
1.0
85℃
0.5
25℃
0.1
-40℃
0.0
0.0
0
2
4
6
FG current : Ifg [mA]
8
10
1
2
Figure 15. FG output L voltage
(Voltage characteristics)
6
Figure 16. FG Output leak current
1.0
10
Lock detection OFF time : Toff [s]
Lock detection ON time : Ton [s]
3
4
5
Supply voltage : Vcc [V]
0.8
0.6
85℃
25℃
-40℃
0.4
0.2
8
6
85℃
25℃
-40℃
4
2
0
0.0
1
2
3
4
5
Supply voltage : Vcc[ V]
6
1
Figure 17. Lock detection ON time
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2
3
4
5
Supply voltage : Vcc [V]
6
Figure 18. Lock detection OFF time
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Datasheet
BU6906NUX
●Auto gain control
Conventional FAN motor driver IC with HALL IC needs adjusting HALL bias resistor due to vary factor about HALL amplitude.
This IC automatically controls HALL amplitude generated by built in HALL element and motor magnet. The result doesn’t need
adjusting HALL amplitude by built in HALL element and unique AGC function. AGC function needs selecting 30ms time for HALL
amp gain when turning on the power, recovering from stand-by mode and lock protection.(Refer to Figure 22 and 23.)
●Soft switching (PWM type)
Soft switching is operated using output PWM switching. The output PWM signal is generated by the slope of AGC HALL
signal. The first, the AGC HALL signal is converted to absolute waveform. Next, synthesize the absolute waveform and the
triangular waveform by inside IC generated. The synthesized waveform has determined PWM soft switching duty and the ratio
of time.
PWM soft switching time depends on motor speed. In case of HALL signal a slower, PWM soft switching time is long due to
the obtuse angle of the AGC HALL signal. (PWM soft switching time is about 2ms to 4ms.) The other, in case of HALL signal a
faster, PWM soft switching time is short due to the sharp slope of the AGC HALL signal. (PWM soft switching time is about
200µs to 1ms.) And, PWM soft switching frequency is 50 kHz (typical) for making triangle oscillator IC inside. Hence, input
PWM frequency is not equal to PWM soft switching frequency.
(a) Convert to absolute waveform from the AGC HALL signal
(b) Motor speed is slow
(c) Motor speed is fast
Figure 19. PWM soft switching signal synthesis
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BU6906NUX
●PWM control
Rotation speed of motor can be changed by controlling ON/OFF of the upper output depending on duty of the signal input to
PWM terminal. When PWM terminal is open, H logic is applied. Output PWM frequency is 50 kHz (typical). This IC is not direct
PWM. Hence, input PWM frequency is not equal to output PWM frequency. Figure 20. shows characteristic input PWM duty and
output PWM duty.
PWM terminal build in digital low pass filter (Henceforth abbreviated to LPF). Output PWM duty transitional time is max 3.5 ms
from changing input PWM duty by LPF characteristic (Reference is shown in Figure 21.). Additionally, Input PWM frequency
uses more than 5 kHz.
Output PWM DUTY [%]
100
80
60
40
20
0
0
20
40
60
80
Input PWM DUTY [%]
100
Figure 20. Characteristic input PWM DUTY and output PWM DUTY
N
S
N
S
VCC
Input PWM frequency(Ex. 25kHz)
PWM
PWM DUTY transitional time
(Max 3.5ms)
Output PWM frequency
(Ex. 50kHz, depends on input PWM DUTY)
OUT1
OUT2
FG
PWM soft-switching time
(Depends on motor speed)
Figure 21. Timing chart in PWM control
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BU6906NUX
● Low duty start up function
When motor starts up from stop condition, outputs are driven in about PWM 50% duty until 3 times changing magnetic
direction. The output duty depends on the input PWM duty (except 0%). Even if input duty of PWM signal is low, the motor can
be started. In case of input PWM duty area 2.5% to 50%, output PWM duty starts all 50% until 3 times changing magnetic
direction. After the low PWM duty start up function, output PWM duty changes corresponding to input PWM duty. The other, in
case of input PWM duty range more than 50%, output PWM duty changes corresponding to same input PWM duty at all driving
time. Even if input duty of PWM signal is more less 50%, the motor can be started by this function.
When input PWM duty is 0%, the motor can be stay stand-by mode. Additionally, the motor changes idling mode in input
PWM duty range from 0% to 2.5%. Idling mode only runs circuit current (Icc1) of IC. Idling mode is made all outputs terminals
to open state.
(a) Case A : Input PWM DUTY 2.5% to 50%
(b) Case B : Input PWM DUTY 50% to 100%
Figure 22. Low duty start up function
Table 1 Truth table input PWM duty and each outputs terminals
Input PWM duty [%]
IC function (state)
DUTY 0
DUTY 0 < 2.5
OFF
ON
Case A : DUTY 2.5 to 50
ON
Case B : DUTY 50 to 100
ON
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(Stand-by mode)
(Idle mode)
(Low duty start up
driving)
(Normal driving)
OUT1, OUT2
FG
OFF, OFF (Open state)
OFF, OFF (Open state)
H (Output Tr : OFF)
H (Output Tr : OFF)
H / L, L / H
H/L
H / L, L / H
H/L
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Datasheet
BU6906NUX
●Quick start function
The quick start function is built into this series. When the PWM signal is input, this function can start up the motor at once
regardless of the detection time of the lock protection function. (Notice, need HALL amp gain select time. Reference is shown
in Figure 23.)
●Stand-by mode
Stand-by function turns off the circuit when the time of PWM=L has elapsed in order to reduce stand-by current. The circuit
current in stand-by mode is specified at the parameter “Circuit current 2” of electrical characteristics. Figure 23. shows timing
chart stand-by mode and quick start function.
The 0% detection time for changing stand-by mode is variable by input PWM duty. Because this IC has a LPF after PWM
terminal. For example input PWM frequency 25kHz, the characteristic 0% detection time and input PWM duty is shown in
Figure 24.
Figure 23. Stand-by mode and quick start function
Input PWM DUTY [%]
100
80
60
40
20
0
0.0
1.0
2.0
3.0
0% detection time : T0 [ms]
4.0
Figure 24. Characteristic 0% detection time and input PWM duty at 25kHz
●Lock protection and automatic restart
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 Figure 25.
Magnet
direction
NSNSNSNS
N
N
SNS
Toff
Ton
SNSNSN
Toff
OUT1
Output Tr OFF
ON
OUT2
Depends on HALL signal
( L in this figure )
FG
Motor
locking
Lock Idling
ditection
Lock
release
Recovers normal
operation
Figure 25. Lock protection timing chart
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Datasheet
BU6906NUX
●Equivalent circuit
1) Supply voltage terminal
2) PWM signal input terminal
Vcc
Vcc
100kΩ
10kΩ
PWM
GND
3) FG output terminal
4) Motor output terminal
Vcc
FG
OUT1
OUT2
GND
GND
●HALL position (Reference data)
2.0±0.1
3.0±0.1
0.45
0.18
HALL position
(Reference data)
HALL position
(Reference data)
0.6MAX
1PINMARK
+0.03
0.02
S
0.02
0.12
0.23
(Referencedata)
0.08
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BU6906NUX
●Safety measure
1) Reverse connection protection diode
Reverse connection of power results in IC destruction as shown in Figure 26. When reverse connection is possible,
reverse connection protection diode must be added between power supply and Vcc.
In normal energization
After reverse connection destruction
prevention
Reverse power connection
Vcc
Vcc
Circuit
block
Vcc
Circuit
block
Each
Pin
GND
Circuit
block
Each
Pin
GND
GND
Large current flows
→ Thermal destruction
Internal circuit impedance high
→ amperage small
Each
Pin
No destruction
Figure 26. Flow of current when power is connected reversely
2) Measure against Vcc voltage rise by back electromotive force
Back electromotive force (Back EMF) generates regenerative current to power supply. However, when reverse
connection protection diode is connected, Vcc voltage rises because the diode prevents current flow to power supply.
ON
ON
ON
Phase switching
ON
Figure 27. Vcc voltage rise by back electromotive force
When the absolute maximum rated voltage may be exceeded due to voltage rise by back electromotive force, place (A)
Capacitor or (B) Zener diode between Vcc and GND. If necessary, add both (C). (D) Capacitor and resister are
improved ESD surge destruction.
(A) Capacitor
(B) Zener diode
ON
ON
ON
ON
(C) Capacitor and Zener diode
(D) Capacitor and resister
ON
ON
ON
ON
Figure 28. Measure against Vcc voltage rise
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3) Problem of GND line PWM switching
Do not perform PWM switching of GND line because GND terminal potential cannot be kept to a minimum.
Vcc
Motor
Driver
M
Controller
GND
PWM input
Prohibite
Figure 29. GND Line PWM switching prohibited
4) FG output
FG output is an open collector and requires pull-up resistor. The IC can be protected by adding resistor R1. An excess
of absolute maximum rating, when FG output terminal is directly connected to power supply, could damage the IC.
Vcc
Pull-up resistor
FG
R1
Protection resistor
Connector of board
Figure 30. Protection of FG terminal
●Thermal derating curve
Thermal derating curve indicates power that can be consumed by IC with reference to ambient temperature. Power that can
be consumed by IC begins to attenuate at certain ambient temperature. This gradient is determined by thermal resistance
θja.
Thermal resistance θja depends on chip size, power consumption, package ambient temperature, packaging condition,
wind velocity, etc., even when the same package is used. Thermal derating curve indicates a reference value measured at
a specified condition. Figure 31. shows a thermal derating curve.
POWER DISSIPATION : Pd [mW]
600
500
400
300
200
100
0
0
25
50
75 100 125 150
AMBIENT TEMPERATURE : Ta [℃]
Reduce by 4.1mW/℃ over 25℃.
(70.0mm×70.0mm×1.6mm FR4 glass epoxy board)
Figure 31. Thermal derating curve
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BU6906NUX
●Operational Notes
1) Absolute maximum ratings
Devices may be destroyed when supply voltage or operating temperature exceeds the absolute maximum ratings.
Because the cause of this damage cannot be identified as a short circuit or an open circuit, if any over rated values will
expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses.
2) Connecting the power supply connector backward
Connecting of the power supply in reverse polarity can damage IC. Take precautions when connecting the power
supply lines. An external direction diode can be added.
3) Power supply line
Back electromotive force causes regenerated current to power supply line, therefore take a measure such as placing a
capacitor between power supply and GND for routing regenerated current. And fully ensure that the capacitor
characteristics have no problem before determine a capacitor value. (when applying electrolytic capacitors,
capacitance characteristic values are reduced at low temperatures)
4) GND potential
It is possible that the motor output terminal may deflect below GND terminal because of influence by back
electromotive force of motor. The potential of GND terminal must be minimum potential in all operating conditions,
except that the levels of the motor outputs terminals are under GND level by the back electromotive force of the motor
coil. Also ensure that all terminals except GND and motor output terminals do not fall below GND voltage including
transient characteristics. Malfunction may possibly occur depending on use condition, environment, and property of
individual motor. Please make fully confirmation that no problem is found on operation of IC.
5) Thermal design
Use a thermal design that allows for a sufficient margin in light of the power dissipation(Pd) in actual operating
conditions.
6) Inter-pin shorts and mounting errors
Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any
connection error or if pins are shorted together.
7) Actions in strong electromagnetic field
Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to
malfunction.
8) ASO
When using the IC, set the output transistor so that it does not exceed absolute maximum rations or ASO.
9) Thermal shut down circuit
The IC incorporates a built-in thermal shutdown circuit (TSD circuit). Operation temperature is 150℃(typ.) and has a
hysteresis width of 25℃(typ.). When IC chip temperature rises and TSD circuit works, the output terminal becomes an
open state. TSD circuit is designed only to shut the IC off to prevent thermal runaway. It is not designed to protect the
IC or guarantee its operation. Do not continue to use the IC after operation this circuit or use the IC in an environment
where the operation of this circuit is assumed.
10) Testing on application boards
When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to
stress. Always discharge capacitors after each process or step. Always turn the IC’s power supply off before connecting
it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an
antistatic measure. Use similar precaution when transporting or storing the IC.
11) GND wiring pattern
When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns,
placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage
variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change
the GND wiring pattern of any external components, either.
12) Capacitor between output and GND
When a large capacitor is connected between output and GND, if Vcc is shorted with 0V or GND for some cause, it is
possible that the current charged in the capacitor may flow into the output resulting in destruction. Keep the capacitor
between output and GND below 100uF.
13) IC terminal input
When Vcc voltage is not applied to IC, do not apply voltage to each input terminal. When voltage above Vcc or below
GND is applied to the input terminal, parasitic element is actuated due to the structure of IC. Operation of parasitic
element causes mutual interference between circuits, resulting in malfunction as well as destruction in the last. Do not
use in a manner where parasitic element is actuated.
14) In use
We are sure that the example of application circuit is preferable, but please check the character further more in
application to a part which requires high precision. In using the unit with external circuit constant changed, consider the
variation of externally equipped parts and our IC including not only static character but also transient character and
allow sufficient margin in determining.
Status of this document
The Japanese version of this document is formal specification. A customer may use this translation version only for a reference
to help reading the formal version.
If there are any differences in translation version of this document formal version takes priority.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
15/16
TSZ02201-0H1H0B100090-1-2
31.Jul.2012 Rev.002
Datasheet
BU6906NUX
●Physical Dimension Tape and Reel Information
VSON008X2030
3.0±0.1
2.0±0.1
0.6MAX
1PIN MARK
TR
The direction is the 1pin of product is at the upper right when you hold
( reel on the left hand and you pull out the tape on the right hand
)
(0.12)
+0.03
0.02 −0.02
1.5±0.1
4000pcs
0.5
1
4
8
5
0.25
1.4±0.1
0.3±0.1
C0.25
Embossed carrier tape
Quantity
Direction
of feed
S
0.08 S
Tape
1pin
+0.05
0.25 −0.04
Reel
(Unit : mm)
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
●Marking Diagram(s)(TOP VIEW)
VSON008X2030(TOP VIEW)
Part Number Marking
U69
LOT Number
0 6
1PIN MARK
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
16/16
TSZ02201-0H1H0B100090-1-2
31.Jul.2012 Rev.002
Datasheet
Notice
Precaution on using ROHM Products
1.
Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
(Note 1)
, transport
intend to use our Products in devices requiring extremely high reliability (such as medical equipment
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅣ
CLASSⅢ
2.
ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3.
Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4.
The Products are not subject to radiation-proof design.
5.
Please verify and confirm characteristics of the final or mounted products in using the Products.
6.
In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7.
De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8.
Confirm that operation temperature is within the specified range described in the product specification.
9.
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1.
When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2.
In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
Precautions Regarding Application Examples and External Circuits
1.
If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2.
You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1.
Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2.
Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3.
Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4.
Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
Precaution Regarding Intellectual Property Rights
1.
All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2.
No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the information contained in this document.
Other Precaution
1.
This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2.
The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
3.
In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
4.
The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.
3.
The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or
concerning such information.
Notice – WE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.001