BCDSEMI AH9280Z4-G1

Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
General Description
Features
The AH9280 is a most advanced smart fan controller
and Hall IC driver manufactured by special CMOS
process. It is designed for 5V, 12V and 24V cooling
fan. To allow survival in a harsh environment and
lower the total system cost, the AH9280 has been
designed with many powerful functions while almost
eliminating all discrete components, such as,
capacitor, resistor, transistor, diode and PC board.
•
•
•
•
•
•
•
•
The AH9280 can operate normally in an ambient
temperature up to 125°C due to its Hall IC circuitry
and power MOSFET output that allow low power
dissipation.
AH9280
High-sensitivity Integrated Hall Sensor
Low Start-up Voltage
5V, 12V and 24V Operation
Peak Output Current up to 1200mA
Power-efficient CMOS and Power MOSFETs
Built-in Output Protection Clamping Diode
Locked Rotor Shutdown and Auto-restart
ESD Rating: 6000V (Human Body Model)
400V (Machine Model)
Applications
•
•
•
•
When there is no motion for one second, the IC will
automatically detect the locked rotor conditions, and
enter protection mode, shutting off the motor driver
for five seconds. Then, the IC will turn on the motor
driver for one second to detect whether there is
rotation condition, if fails, the IC will shut off motor
driver for five seconds again. This sequence will be
repeated until rotation condition is detected, and the
IC enters normal operation. This feature can
effectively prevent the AH9280 from overheating and
damage due to long-time locked rotor condition.
5V/12V/24V DC Brushless Motor/Fan
PC, Server, Laptop Cooling Fan
Power Supply Cooling Fan
Large/Small Sized Fan
Specially designed for driving large fans, the AH9280
is optimized for low start-up voltage.
The AH9280 is available in TO-94 package.
TO-94
Figure 1. Package Type of AH9280
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
1
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Pin Configuration
Z4 Package
(TO-94)
4
3
2
1
Figure 2. Pin Configuration of AH9280 (Front View)
Pin Description
Pin Number
Pin Name
1
VCC
2
DO
Output pin 1
3
DOB
Output pin 2
4
GND
Ground pin
Mar. 2010
Function
Power supply pin
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Functional Block Diagram
Figure 3. Functional Block Diagram of AH9280
Ordering Information
AH9280
-
G1: Green
Circuit Type
Package
Z4: TO-94
Package
Temperature
Range
TO-94
-40 to 125°C
Part Number
AH9280Z4-G1
Marking ID
9280Z4-G1
Packing Type
Bulk
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Absolute Maximum Ratings (Note 1, TA=25°C)
Parameter
Symbol
Value
Unit
VCC
28
V
Peak Output Current
IOUT_P
1200
mA
Continuous Output Current
IOUT_C
600
mA
Supply Current (Fault)
ICC
6
mA
Power Dissipation
PD
600
mW
Thermal Resistance (Junction to Ambient)
θJA
208
°C/W
Storage Temperature
TSTG
-55 to 150
°C
ESD (Human Body Model)
ESD
6000
V
ESD (Machine Model)
ESD
400
V
Supply Voltage
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
Min
Max
Unit
Supply Voltage
VCC
2.5
24 (Note 2)
V
Ambient Temperature
TA
-40
125
°C
Note 2: It is recommended to add a 680Ω resistor at VCC if the supply voltage is 24V.
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
4
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Electrical Characteristics
VCC =12V, TA =25°C, unless otherwise specified.
Parameter
Symbol
Conditions
Supply Voltage
VCC
Operating
Supply Current
ICC
Average
Output Current
IOUT
Output Leakage Current
Min
2.5
Typ
mA
500
mA
0.1
10
µA
600
1000
mV
12
V
Saturation Voltage
VSAT
Output On Time
TON
0.8
s
Output Off Time
TOFF
5
s
VZ
35
V
Output Zener Break-down Voltage
IOUT=350mA
Unit
24
(Note 2)
6
4
ILEAKAGE
Max
Magnetic Characteristics
VCC =12V, TA =25°C, unless otherwise specified.
Parameter
Symbol
Operating Point
BOP
Releasing Point
BRP
Hysteresis
BHYS
Min
-50
Typ
Max
Unit
20
50
Gauss
-20
Gauss
40
Gauss
VDO (V)
High
Off-state
BHYS
Turn On
Turn Off
VSAT
N
Low
On-state
BRP
0
S
BOP
Figure 4. Magnetic Flux Density (Gauss)
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
5
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Test Circuit
S
Marking Side
N
Figure 5. Basic Test Circuit of AH9280
VCC
VDO (V)
VDOB (V)
12
12
10
10
8
8
6
6
4
4
2
2
VSAT
VSAT
0
-40
-20
0
0
20
40
-40
Magnetic Flux Density B (Gauss)
-20
0
20
40
Magnetic Flux Density B(Gauss)
Figure 6. VDO vs. Magnetic Flux Density
Mar. 2010
VCC
Figure 7. VDOB vs. Magnetic Flux Density
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
6
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Typical Performance Characteristics
6.0
6.0
5.5
5.5
5.0
Supply Current (mA)
Supply Current (mA)
5.0
4.5
4.0
3.5
3.0
2.5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
2.0
1.0
1.5
o
TA=25 C
4
8
12
16
20
VCC=12V
0.5
1.0
0.0
-40
24
-20
0
Supply Voltage (V)
20
40
60
80
100
120
o
Ambient Temperature ( C)
Figure 8. Supply Current vs. Supply Voltage
Figure 9. Supply Current vs. Ambient Temperature
100
1000
o
TA=25 C
50
VCC=12V
IOUT=150mA
BRP
Saturation Voltage (mV)
BOP/BRP/BHYS (Gauss)
900
BOP
75
BHYS
25
0
-25
800
IOUT=350mA
700
600
500
400
300
-50
200
-75
4
8
12
16
20
100
-40
24
0
20
40
60
80
100
120
Ambient Temperature ( C)
Figure 10. BOP/BRP/BHYS vs. Supply Voltage
Mar. 2010
-20
o
Supply Voltage (V)
Figure 11. Saturation Voltage vs. Ambient Temperature
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
7
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
1200
600
1000
500
Power Dissipation (mV)
Saturation Voltage (mV)
Typical Performance Characteristics (Continued)
800
600
400
400
300
200
o
TA=25 C
200
100
VCC=12V
0
0
100
200
300
400
500
0
600
-25
Output Current (mA)
0
25
50
75
100
125
150
o
Ambient Temperature ( C)
Figure 12. Saturation Voltage vs. Output Current
Figure 13. Power Dissipation vs. Ambient Temperature
50
40
BOP/BRP/BHYS (Gauss)
30
20
10
0
-10
VCC=12V
BOP
BRP
BHYS
-20
-30
-40
-50
-40
-20
0
20
40
60
80
100
120
o
Ambient Temperature ( C)
Figure 14. BOP/BRP/BHYS vs. Ambient Temperature
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
8
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Typical Application
Figure 15. Typical Application of AH9280 (For 5V and 12V Brushless DC Fan, Note 3)
Figure 16. Typical Application of AH9280 (For 24V Brushless DC Fan, Note 3)
Note 3:
1. Typical 2.2µF electrolytic capacitors are recommended for C1, C2 and C3.
2. Typical 680Ω resistor is recommended for R1.
3. D1 is an ordinary diode used to block the reverse current from coil side.
4. D1, C1, C2, C3 (marked in dash rectangle) can be cancelled according to system requirement.
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
9
Preliminary Datasheet
Two Phase Dual-coil High Voltage Smart Fan Motor Driver
AH9280
Mechanical Dimensions
TO-94
0.500(0.020)
0.700(0.028)
3.780(0.149)
Unit: mm(inch)
45 °TYP
4.080(0.161)
1.520(0.059)
1.720(0.067)
0.700(0.028)
0.900(0.035)
4.980(0.196)
5.280(0.208)
0.360(0.014)
0.510(0.020)
2.000(0.079)
2.300(0.091)
1.100(0.043)
1.400(0.055)
Package Sensor Location
0.380(0.015)
0.550(0.022)
3.450(0.136)
3.750(0.148)
(For Hall IC)
0.360(0.014)
0.500(0.020)
14.000(0.550)
15.300(0.602)
1.270(0.050) TYP
3.710(0.146)
3.910(0.154)
Mar. 2010
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
10
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