BU6909AGFT PDF даташит
Спецификация BU6909AGFT изготовлена «ROHM Semiconductor» и имеет функцию, называемую «5V Single-phase Full-wave Fan Motor Driver». |
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Детали детали
Номер произв | BU6909AGFT |
Описание | 5V Single-phase Full-wave Fan Motor Driver |
Производители | ROHM Semiconductor |
логотип |
22 Pages
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DC Brushless Fan Motor Driver
5V Single-phase Full-wave
Fan Motor Driver
BU6909AGFT
Description
The BU6909AGFT is a 5V single-phase full-wave FAN motor driver with built in HALL element. It is part of the DC brushless
FAN motor driver series. BU6909AGFT is built in a compact package and provides Auto Gain Control function (AGC), silent
drive by soft switching, and low battery consumption via its standby function. BU6909AGFT is best used for notebook 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
Incorporates lock protection and automatic restart
circuit
Compact package (GFT:TSSOF6 flat lead package)
When TSSOF6 is mounted, package thickness is
0.3mm
Rotating speed pulse signal (FG) output
PWM speed control
Package
TSSOF6
W(Typ) x D(Typ) x H(Max)
2.90mm x 3.80mm x 0.8mm
TSSOF6
Applications
For compact 5V FAN such as notebook PC cooling FAN
Absolute Maximum Ratings
Parameter
Symbol
Limit
Supply Voltage
Power Dissipation
VCC
Pd
7
0.54(Note 1)
Operating Temperature
Topr -40 to +85
Storage Temperature
Tstg -55 to +125
Output Voltage
Output Current
FG Signal Output Voltage
FG Signal Output Current
Junction Temperature
VOMAX
IOMAX
VFG
IFG
Tjmax
7
800(Note 2)
7
10
125
(Note 1) Reduce by 5.4mW/℃ over 25℃. (On 70.0mm×70.0mm×1.6mm glass epoxy board)
(Note 2) This value is not to exceed Pd.
Unit
V
W
°C
°C
V
mA
V
mA
°C
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
Symbol
VCC
Limit
1.8 to 5.5
Unit
V
○Product structure:Silicon monolithic integrated circuit
.www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no protection against radioactive rays
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TSZ02201-0H1H0B101190-1-2
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BU6909AGFT
Datasheet
Block Diagram
This is an open drain output.
Connect a pull-up resistor.
Page 15.
FG
1
GND
2
OUT1
3
HALL ELEMENT
OFFSET
CANCEL
OSCILLATOR
CIRCUIT
UVLO
TSD
CONTROL
LOGIC
A/D
CONVERSION
PRE
DRIVER
H-BRIDGE
LOCK
PROTECTION
PWM DUTY
SIGNAL OUT
VCC
6
Consider protection against
voltage rise due to reverse
connection of power supply and
back electromotive force.
Page 14.
PWM
5
OUT2
4
Enables speed control by
applying external PWM signal.
Maximum input frequency is
50KHz.
Page 10.
Conventional FAN motor driver IC with HALL element requires
adjustment of HALL bias resistor due to several factors that
affect the HALL Amplitude. This IC automatically adjusts HALL
amplitude through the use of a built in HALL element and unique
AGC function.
Page 8.
M
TSD : Thermal shut down((hHeeaattrperjeocteticotniocnirccuirict)uit)
UVLO :Under voltage lock outputs (low voltage protection circuit)
Figure 1. Block diagram and Application circuit
Pin Description
Pin No.
1
2
3
4
5
6
Pin Name
FG
GND
OUT1
OUT2
PWM
VCC
Function
FG signal output
GND
Motor output 1
Motor output 2
PWM signal input
Power supply
I/O truth table
・Supply magnetic direction (positive)
S
Marking
N
・Output operation
VOUT1
VOUT2
BHYS
BHYS
BREV
BFWD
Magnetic flux density:B
Figure 2. Output operation
BREV
BFWD
Magnetic flux density:B
Supply magnetic
direction
PWM*
OUT1
OUT2
S H(OPEN) H
L
N H(OPEN) L
H
SLLL
NL L L
*When PWM terminal is L, IC state changes to stand-by mode. FG terminal is always H in stand-by mode
FG
L (Output Tr:ON)
H (Output Tr:OFF)
H (Output Tr:OFF)
H (Output Tr:OFF)
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
2/18
TSZ02201-0H1H0B101190-1-2
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BU6909AGFT
Datasheet
Electrical Characteristics (Unless otherwise specified Ta=25°C, VCC=5V)
Parameter
Symbol MIN TYP MAX
Unit
Conditions
Circuit Current 1
Circuit Current 2
(stand-by mode)
Magnetic Switch-point for
Forward Rotation
Magnetic Switch-point for
Reverse Rotation
Magnetic hysteresis
ICC1
ICC2
BFWD
BREV
BHYS
-
-
-
-
2 4 mA PWM=OPEN
25 50 µA PWM=GND
1.5 mT
-1.5 - mT
3.0 5.0 mT
PWM Input H Level
VPWMH
2.5
-
VCC
V
PWM Input L Level
VPWML
0
- 0.8 V
PWM Input Frequency
Output Voltage
FG Low Voltage
fPWM
5
- 50 kHz
VO
-
0.16
0.24
V
Io=200mA
Upper and Lower total
VFGL
-
- 0.4 V IFG=5mA
FG Leak Current
IFGL
-
-
5 µA VFG=7V
Lock Detection ON Time
tON 0.35 0.50 0.65 s
Lock Detection OFF Time
tOFF 3.5 5.0 6.5 s
Characteristics
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
-
-
-
Figure 8 to 13
Figure 14,15
Figure 16
Figure 17
Figure 18
www.rohm.com
© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
3/18
TSZ02201-0H1H0B101190-1-2
28.Oct.2014 Rev.002
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Номер в каталоге | Описание | Производители |
BU6909AGFT | 5V Single-phase Full-wave Fan Motor Driver | ROHM Semiconductor |
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