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Rohm Semiconductor Electronic Components Datasheet

BD6966FVM Datasheet

5V single-phase full wave DC brushless fan motor driver

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DC Brushless Motor Drivers for Fans
5V single-phase full wave
DC brushless fan motor driver
BD6966FVM
No.12010EAT12
Description
This is the summary of application for BD6966FVM 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
1) Small package (MSOP10)
2) Soft switched drive
3) PWM speed control
4) Low duty start up function and enable/disable selectable
5) Quick start function
6) Stand-by function
7) Constant voltage output for hall element
8) Lock protection and automatic restart circuit without external capacitor
9) Rotating speed pulse signal (FG) output
Application
For compact 5V fan such as notebook PC cooling fan
Absolute maximum ratings
Parameter
Symbol
Limit
Unit
Supply voltage
Power dissipation
Operation temperature
Storage temperature
Output voltage
Output current
Vcc
Pd
Topr
Tstg
Vomax
Iomax
7
585*
-40+105
-55+150
7
1000**
V
mW
V
mA
FG signal output voltage
Vfg
7
V
FG signal output current
Ifg
10 mA
Hall bias output current
Ihb
10
Junction temperature
Tjmax
150
* Reduce by 4.68mW/over Ta=25ºC(On 70mm×70mm×1.6mm glass epoxy board)
** This value is not to exceed Pd
Operating conditions
Parameter
Symbol
Operating supply voltage range Vcc
Hall input voltage range
Vh
Limit
1.85.5
0.4Vcc-1.1
mA
Unit
V
V
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
1/12
2012.03 - Rev.A


Rohm Semiconductor Electronic Components Datasheet

BD6966FVM Datasheet

5V single-phase full wave DC brushless fan motor driver

No Preview Available !

BD6966FVM
Technical Note
Electrical characteristics(Unless otherwise specified Ta=25,Vcc=5V)
Parameter
Circuit current 1
Circuit current 2
(Stand-by mode)
Hall bias voltage
Symbol
Min.
Limits
Typ.
Max.
Unit
Conditions
Icc1 1 3 6 mA PWM=OPEN
Icc2 15 25 35 uA PWM=GND
Vhb 0.9 1.0 1.1 V Ihb=-3mA
Characteristics
Fig.1
Fig.2
Fig.3
Input offset voltage
Vofs 0
- ±6 mV
-
PWM input H level
Vpwmh 2.5
- Vcc+0.3 V
-
PWM input L level
Vpwml -0.3
-
0.8 V
-
PWM input current
Ipwmh
-
0
- μA PWM=Vcc
Ipwml -33 -25 -17 μA PWM=GND
-
-
PWM input frequency
SEL input L level
Output voltage
Input-output Gain
Fpwm
2
- 50 kHz
Vsell
-0.3
-
0.8
Vo - 0.4 0.6
V
SEL=L
Start duty assist ON
V
Io=300mA
Upper and Lower total
Gio
43 44.5 46
dB
-
-
Fig.47
-
FG hysteresis voltage
Vhys
±5 ±10 ±15 mV
Fig.8
FG low voltage
FG leak current
Vfgl - 0.12 0.3 V Ifg=5mA
Ifgl 0 - 5 μA Vfg=7V
Fig.9,10
-
Lock detection ON time Ton 0.35 0.50 0.65 s
Fig.11
Lock detection OFF time Toff
3.5 5.0 6.5
s PWM=OPEN
Fig.12
Truth table
H+
H
L
H
L
H-
PWM
OUT1
OUT2
L H(OPEN) H
L
H H(OPEN) L
H
LLLL
HL L L
FG
H(Output TrOFF)
L(Output TrON)
H(Output TrOFF)
L(Output TrON)
* FG=H at stand-by mode
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
2/12
2012.03 - Rev.A


Part Number BD6966FVM
Description 5V single-phase full wave DC brushless fan motor driver
Maker ROHM
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BD6966FVM Datasheet PDF






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