TO-94 [BCDSEMI]
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER; 两相双线圈的CMOS智能风扇电机驱动器
| 型号： | TO-94 |
| 厂家： | 
BCD SEMICONDUCTOR MANUFACTURING LIMITED |
| 描述： | TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER |
| 文件： | 总12页 (文件大小：431K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Features
General Description
•
•
On Chip Hall Sensor
Built-in Zener Diodes Protection for Output
Driver
Power Efficient CMOS and Power MOSFET
Drivers Allow 400mA Without Overheating
5V and 12V Operation
High Sensitivity for Switching Symmetry
Locked Rotor Shutdown and Auto Restart
ESD Rating: 4000V(Human Body Model)
400V(Machine Model)
The AH9279 is a most advanced fan control and
drive Hall IC manufactured by special CMOS
process. This IC consists of voltage reference, Hall
sensor, signal amplifier, wave shaping circuit, locked
rotor detector, locked rotor protection and restart
circuit, output drive circuit, etc.. To allow survival in
a harsh environment and in consideration of low cost,
the AH9279 has been designed with many functions
internally, and requires less external components.
•
•
•
•
•
When there is no motion for one second, the IC will
detect locked rotor conditions, enter protection mode
automatically and disable two outputs for five
seconds. Then, it will turn on drive current from one
channel for one second. If it still fails to detect fan
rotation, the AH9279 will shut off the outputs for five
seconds again. This sequence will be repeated until
rotation condition is detected and the IC enters
normal operation mode. This function prevents the
chip from overheating and damage due to long time
locked rotor.
Applications
•
Dual-coil Brushless DC Fan
The power dissipation decides allowable maximum
ambient temperature. Low power dissipation of
AH9279 and the output MOSFET power transistor
enable it to be used at ambient temperature up to
125°C on condition that the drive power is lower than
100mW or drive current is less than 200mA.
The AH9279 is available in TO-94 package.
TO-94
Figure 1. Package Type of AH9279
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
1
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Pin Configuration
Z4 Package
(TO-94)
GND
4
3
2
1
DOB
DO
VCC
Figure 2. Pin Configuration of AH9279 (Front View)
Pin Description
Pin Number
Pin Name
Function
1
2
3
4
VCC
DO
Power supply pin
Output pin 1
Output pin 2
Ground pin
DOB
GND
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
2
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Functional Block Diagram
Figure 3. Functional Block Diagram of AH9279
Ordering Information
AH9279
-
G1: Green
Circuit Type
Package
Z4: TO-94
Package
Temperature Range
Part Number
Marking ID
Packing Type
TO-94
AH9279Z4-G1
9279Z4-G1
Bulk
-20 to 125°C
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
3
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Absolute Maximum Ratings (TA=25°C, Note 1)
Parameter
Symbol
VCC
ICC
Value
18
Unit
V
Supply Voltage
Supply current (Fault)
Output current
5
mA
mA
mW
500
IOUT
PD
Power dissipation
550
Thermal Resistance (Junction to Ambient)
Storage Temperature
ESD (Human Body Model)
ESD (Machine Model)
θJA
227
°C/W
°C
V
-55 to 150
4000
400
TSTG
ESD
ESD
V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
VCC
Min
3.5
Max
16
Unit
V
Supply Voltage
Ambient Temperature
TA
-20
125
°C
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
4
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Electrical Characteristics
VCC =12V, TA =25°C, unless otherwise specified.
Parameter
Symbol
VCC
Conditions
Min
Typ
Max
16
Unit
V
Operating
Average
3.5
Supply Voltage
Supply Current
Output Current
3.5
5
mA
mA
µA
mV
S
ICC
500
10
IOUT
Output Leakage Current
Saturation Voltage
Output ON Time
0.1
600
0.8
5
ILEAKAGE
VSAT
tON
V
OUT=24V
1000
I
OUT =350mA
Output OFF Time
tOFF
S
Output Zener Break-down
Voltage
VZ
35
V
Thermal Resistance
(Junction to Case)
θJC
49
°C/W
Magnetic Characteristics
VCC =12V, TA =25°C, unless otherwise specified.
Parameter
Operating Point
Releasing Point
Hysteresis
Symbol
BOP
Min
Typ
25
Max
Unit
50
Gauss
Gauss
Gauss
BRP
-50
-25
50
BHYS
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
5
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Test Circuit
S
Marking Side
N
Figure 4. Basic Test Circuit of AH9279
DO( V)
DOB(V)
VCC
VCC
12
10
8
12
10
8
6
6
4
4
2
2
VSAT
VSAT
0
0
-40
-20
0
20
40
-40
-20
0
20
40
Magnetic Flux Density B(GS)
Magnetic Flux Density B(GS)
Figure 5. VDO vs. Magnetic Flux Density
Figure 6. VDOB vs. Magnetic Flux Density
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Typical Performance Characteristics
6.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
TA=25oC
1.0
TA=25OC
VCC=12V
0.5
0.0
4
6
8
10
12
14
16
18
-20
0
20
40
60
80
100
120
Ambient Temperature (oC)
Supply Voltage (V)
Figure 7. Supply Current vs. Supply Voltage
Figure 8. Supply Current vs. Ambient Temperature
100
50
0
900
800
700
600
500
400
BOP
VCC=12V
TA=25OC
16
-50
BRP
300
IOUT=350mA
BHYS
200
4
6
8
10
12
14
18
-20
0
20
40
60
80
100
120
Ambient Temperature (OC)
Supply Voltage (V)
Figure 9. BOP/BRP/BHYS vs. Supply Voltage
Figure 10. Saturation Voltage vs. Ambient Temperature
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Typical Performance Characteristics (Continued)
1200
600
1000
500
800
400
600
300
400
200
TA=25OC
V
CC=12V
200
0
100
0
-25
0
25
50
75
100
125
150
100
200
300
400
500
Ambient Temperature (OC)
Output Current (mA)
Figure 11. Saturation Voltage vs. Output Current
Figure 12. Power Dissipation vs. Ambient Temperature
40
30
20
10
0
BOP
-10
-20
-30
-40
BRP
BHYS
-20
0
20
40
60
80
100
120
Ambient Temperature (OC)
Figure 13. BOP/BRP/BHYS vs Ambient Temperature
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
8
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Typical Application
VCC=5V or 12V
D1
Coil 1 Coil 2
AH9279
VCC DO
DOB
GND
C3
2.2 F
R2
4.7
R1
4.7
C1
2.2 F
C2
2.2 F
Figure 14. Typical Application 1 of AH9279 (Note 2)
Note 2:
1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged
reversed.
2. C1=C2=C3=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system
design.
3. R1=R2=4.7Ω typical. They can be cancelled according to system requirement.
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
9
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Typical Application (Continued)
VCC=5V or 12V
D1
Coil 1 Coil 2
AH9279
VCC
DOB
DO
GND
C1
2.2 F
ZD2
35V
ZD1
35V
Figure 15. Typical Application 2 of AH9279 (Note 3)
Note 3:
1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged
reversed.
2. C1=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design.
3. ZD1 and ZD2 breakdown voltage are 35V.
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
10
Data Sheet
TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER
AH9279
Mechanical Dimensions
TO-94
Unit: mm(inch)
Oct. 2011 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
11
BCD Semiconductor Manufacturing Limited
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