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PDF BD6966NUX Data sheet ( Hoja de datos )
| Número de pieza | BD6966NUX | |
| Descripción | 5V Single-phase Full-wave Fan motor driver | |
| Fabricantes | ROHM Semiconductor | |
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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
●Package(s)
VSON010X3030
W(Typ.) x D(Typ.) x H(Max.)
3.00mm x 3.00mm x 0.60mm
●Applications
Compact 5V fan such as notebook PC cooling fan
VSON010X3030
●Absolute maximum ratings
Parameter
Symbol
Limit
Unit
Supply voltage
Vcc 7 V
Power dissipation
Pd
580*
mW
Operating temperature
Topr
-40 to +105
ºC
Storage temperature
Tstg -55 to +150 ºC
Output voltage
Vomax
7
V
Output current
Iomax
1000**
mA
FG signal output voltage
Vfg
7
V
FG signal output current
Ifg
10 mA
Hall bias output current
Ihb
10 mA
Junction temperature
Tjmax
150
ºC
* Reduce by 4.64mW/℃ over Ta=25ºC(On 74.2mm×74.2mm×1.6mm glass epoxy board, Copper foil area 6.28mm2)
** This value is not to exceed Pd
●Operating conditions
Parameter
Symbol
Limit
Unit
Operating supply voltage range Vcc
1.8 to 5.5
V
Hall input voltage range
Vh
0.4 to Vcc-1.1
V
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
.www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
1/12
TSZ02201-0H1H0B100140-1-2
5.Jul.2012 Rev.001
1 page  
BD6966NUX
Datasheet
●Description of operations
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
OUT2
FG
Toff Ton
Output Tr OFF ON
Depends on hall signal
(L in this figure)
Motor Lock
locking detection
Lock
Recovers normal
release 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
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/12
TSZ02201-0H1H0B100140-1-2
5.Jul.2012 Rev.001
5 Page 
BD6966NUX
Datasheet
●Notes for use
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 175ºC (typ.) and has a
hysteresis width of 25ºC (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
11/12
TSZ02201-0H1H0B100140-1-2
5.Jul.2012 Rev.001
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet BD6966NUX.PDF ] | |
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