Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
General Description
Features
The AH9479/80/81 is a single chip solution for
driving single coil brushless DC motors. It combines
a motor driver with a high sensitivity Hall sensor,
which simplifies the PCB design and makes the
fabrication of small-size motors possible.
•
•
•
•
•
•
•
•
•
•
The AH9480 has an open-drain tachometer output FG
that follows the Hall sensor latching output. The
AH9481 has an open-drain rotation detection output
RD that is active low when the motor is spinning and
goes high when blocked.
Full Bridge Driver
High Sensitivity Integrated Hall Sensor
Soft-switching for Low Noise
Low Supply Voltage: 2.5V
Locked Rotor Protection and Auto-restart
Thermal Protection
Output Over-current Protection
Short Circuit Protection
Tachometer Output Signal (AH9480)
Alarm Output Signal (AH9481)
Applications
When there is no motion about 0.4 second, the IC
will automatically detect the locked rotor conditions,
and enter protection mode, shutting off the motor
driver for 4 seconds. Then, the IC will turn on the
motor driver for 0.4 second to detect whether there is
rotation condition, if fails, the IC will shut off motor
driver for four seconds again. This sequence will be
repeated until rotation condition is detected, and the
IC enters normal operation. This feature can
effectively prevent the IC from overheating and
damage due to long-time locked rotor condition.
“Soft-switch” is used to reduce the vibration and
acoustic noise. Thermal-shutdown protection ensures
that the motor driver operates under specified
temperature ranges.
•
•
•
•
•
5V/12V Low Noise BLDC Cooling Fans
Low Voltage / Low Power BLDC Motors
Notebook DC Fans / Blowers
Automotive Low Noise Climate Control Fans
Micro-motors
The AH9479 is packaged in TO-94, and the
AH9480/81 is packaged in TO-95 and MSOP-8.
TO-94
TO-95
MSOP-8
Figure 1. Package Types of AH9479/80/81
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
1
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Pin Configuration
Z4 Package
(TO-94)
Z5 Package
(TO-95)
4
GND
3
OUT2
2
OUT1
1
VCC
5
4
3
2
1
(For AH9479)
GND
OUT2
OUT1
VCC
FG/RD
(For AH9480/81)
M8 Package
(MSOP-8)
NC
1
8
NC
FG/RD
2
7
VCC
GND
3
6
OUT2
OUT1
4
5
GND
(For AH9480/81)
Figure 2. Pin Configuration of AH9479/80/81
Pin Description
Pin Number
TO-95
MSOP-8
Pin
Name
1
2
FG/RD
1
2
7
VCC
Frequency generator (rotation detection) open drain
output
Power supply pin
2
3
4
OUT1
Output pin 1
3
4
6
OUT2
Output pin 2
4
5
3, 5
GND
Ground pin
1, 8
NC
TO-94
Mar. 2012
Function
No connection
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
2
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Functional Block Diagram
A (B) {C}
A for TO-94
B for TO-95
C for MSOP-8
Figure 3. Functional Block Diagram of AH9479/80/81
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
3
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Ordering Information
AH94
-
Circuit Type
G1: Green
79: AH9479
80: AH9480
81 :AH9481
TR: Tape & Reel
Blank: Bulk
Package
Z4: TO-94
Z5: TO-95
M8 : MSOP-8
Package
Temperature
Range
Output
Signal
TO-94
TO-95
-40 to 85°C
MSOP-8
Part Number
Marking ID
Packing Type
AH9479Z4-G1
9479Z4-G1
Bulk
FG
AH9480Z5-G1
9480Z5-G1
Bulk
RD
AH9481Z5-G1
9481Z5-G1
Bulk
FG
AH9480M8TR-G1
9480M8-G1
Tape & Reel
RD
AH9481M8TR-G1
9481M8-G1
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
4
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
VCC
18
V
Peak Output Current
IOUT_P
500
mA
Continuous Output Current
IOUT_C
300
mA
FG/RD Pull-up Voltage
VFG/VRD
18
V
FG/RD Output Current
IFG/IRD
10
mA
Supply Voltage
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Thermal Resistance
(Junction to Ambient)
TO-94
550
TO-95
600
MSOP-8
585
PD
mW
TA
-40 to 85
ºC
TSTG
-55 to 150
ºC
θJA
TO-94
227
TO-95
208
MSOP-8
214
ºC/W
ESD (Human Body Model)
ESD
6000
V
ESD (Machine Model)
ESD
200
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
Min
Max
Unit
Supply Voltage
VCC
2.5
16
V
Operating Ambient Temperature
TA
-40
85
ºC
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Electrical Characteristics
VCC=12V, TA=25oC, unless otherwise specified.
Parameter
Supply Voltage
Supply Current
ON Resistance
(RPMOS+RNMOS=RS)
FG/RD Output Low
Voltage
FG/RD Output Leakage
Current
Locked Rotor Period
(ON)
Locked Rotor Period
(OFF)
Protection Temperature
Symbol
Conditions
Min Typ Max Unit
Operating, RCOIL=100Ω VCC
ICC
2.5
16
12
V
mA
VCC=12V,TA=25ºC, IOUT=300mA
VCC=12V,TJ=125℃,IOUT=300mA
4.3
3.3
3.3
IOL=5mA
0.18
0.5
V
VFG (VRD)=5V
0.15
10
µA
tON
VCC>7V
0.4
s
tOFF
VCC>7V
4
s
175
ºC
RDSON1_2
VOL
ILEAKAGE
TOTP
Ω
Ω
Magnetic Characteristics
VCC=12V, TA=25ºC, unless otherwise specified.
Parameter
Symbol
Min
Typ
Max
Unit
Operating Point
BOP
0
20
50
Gauss
Releasing Point
BRP
-50
-20
0
Gauss
Hysteresis
BHYS
Mar. 2012
40
Rev. 1. 1
Gauss
BCD Semiconductor Manufacturing Limited
6
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Test Circuit
S
Marking Side
N
AH9480/81
FG/RD VCC OUT1 OUT2 GND
1
5V
2
3
5
4
FG/RD
VCC
OUT1 (DO)
OUT2 (DOB)
C1
20pF
C2
20pF
Figure 4. Basic Test Circuit of AH9479/80/81
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
7
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Hysteresis Characteristics
VDO (OUT1 ) (V)
VDOB (OUT2) (V)
16
16
14
14
12
12
10
10
8
8
6
6
4
4
VCC
VCC
2
VSAT
0
-30
-20
-10
0
10
20
2
VSAT
-30
30
-20
-10
0
0
10
20
30
Magnetic Flux Density B (Gauss)
Magnetic Flux Density B (Gauss)
Figure 5. VDO vs. Magnetic Flux Density
Figure 6. VDOB vs. Magnetic Flux Density
Typical Performance Characteristics
6.5
10
6.0
5.5
8
5.0
4.5
4.0
ICC (mA)
ICC (mA)
6
4
2
With Magnet
Without Magnet
3.5
3.0
2.5
2.0
VCC=3V
1.5
VCC=5V
1.0
VCC=12V
0.5
0.0
0
0
5
10
15
VCC=18V
-25
20
0
25
50
75
100
O
VCC (V)
TA ( C)
Figure 7. ICC vs. VCC
Mar. 2012
VCC=14V
Figure 8. ICC vs. TA
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
8
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
50
50
40
40
30
30
20
20
10
B (Gauss)
B (Gauss)
Typical Performance Characteristics (Continued)
BOP
BRP
0
VCC=5V
10
BOP
BRP
0
BHYS
BHYS
-10
-10
-20
-20
4
6
8
10
12
14
16
18
20
-25
0
25
VCC (V)
50
75
100
125
O
TA ( C)
Figure 9. BOP/BRP/BHYS vs. VCC
Figure 10. BOP/BRP/BHYS vs. TA (VCC=5V)
50
40
40
30
30
20
B (Gauss)
B (Gauss)
20
10
VCC=12V
BOP
0
BOP
BRP
0
BHYS
BRP
-10
VCC=18V
10
-10
BHYS
-20
-20
-25
0
25
50
75
100
125
-25
O
25
50
75
100
125
TA ( C)
Figure 11. BOP/BRP/BHYS vs. TA (VCC=12V)
Mar. 2012
0
O
TA ( C)
Figure 12. BOP/BRP/BHYS vs. TA (VCC=18V)
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
9
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Typical Performance Characteristics (Continued)
8
10
VCC=3V, IOUT=100mA
VCC=5V, IOUT=200mA
8
VCC=12V, IOUT=300mA
6
VCC=14V, IOUT=300mA
VCC=18V, IOUT=300mA
RS (Ω)
RS (Ω)
VCC=12V
VCC=16V, IOUT=300mA
6
4
4
2
2
0
-25
0
25
50
75
100
125
150
200
250
O
300
350
400
450
IOUT (mA)
TA ( C)
Figure 13. RS vs. TA
Figure 14. RS vs. IOUT
1100
300
1000
900
800
250
VCC=12V, IOUT=5mA
700
VCC=12V, TA=25 C
600
VSAT_FG (mV)
VFG (mV)
O
500
400
200
300
150
200
100
0
0
5
10
15
20
100
25
-25
IOUT (mA)
25
50
75
100
125
O
TA ( C)
Figure 15. VFG vs. IOUT
Mar. 2012
0
Figure 16. VSAT_FG vs. TA
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
10
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Typical Performance Characteristics (Continued)
600
600
Packages: TO-94
TO-95
400
300
200
100
0
-50
400
300
200
100
-25
0
25
50
75
100
125
150
0
-50
175
O
Ambient Temperature ( C)
-25
0
25
50
75
100
125
150
175
o
Ambient Temperature ( C)
Figure 17. Power Dissipation vs. TA
Mar. 2012
Package: MSOP-8
500
Power Dissipation (mW)
Power Dissipation (mW)
500
Figure 18. Power Dissipation vs. TA
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Typical Application
AH9479
VCC
1
OUT1 OUT2
2
3
GND
4
D1
R1
C1
D2
COIL
Note 2:C1 should be at least larger than 2.2µF, R1=0 to 10Ω.
Figure 19. Typical Application of AH9479/80/81
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
12
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Mechanical Dimensions
TO-94
Mar. 2012
Rev. 1. 1
Unit: mm(inch)
BCD Semiconductor Manufacturing Limited
13
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Mechanical Dimensions (Continued)
TO-95
Unit: mm(inch)
1.295(0.051)
1.803(0.071)
0.610(0.024)
MIN
2.200(0.087)
2.400(0.094)
1.000(0.039)
1.200(0.047)
3.531(0.139)
3.785(0.149)
Package Sensor Location
(For Hall IC)
1.220(0.048)
1.620(0.064)
0.381(0.015)
0.581(0.023)
14.000(0.551)
16.000(0.630)
0.360(0.014)
0.510(0.020)
0.950(0.037)
REF
0.330(0.013)
0.432(0.017)
5.105(0.201)
5.359(0.211)
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
14
Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
Mechanical Dimensions (Continued)
MSOP-8
Unit: mm(inch)
0.300(0. 012) TYP
P
0.150(0.006)TY
4.700(0.185)
5.100(0.201)
0.870(0.034)
1.070(0.042)
Hall Sensor
Location
2.900(0.114)
3.100(0.122)
1.350(0.053)
1.550(0.061)
0.410(0.016)
0.650(0.026)
0.650(0. 026) TYP
0.760(0.030)
0.970(0.038)
0.800(0.031)
1.200(0.047)
0.200(0.008)
2.900(0. 114)
3.100(0. 122)
0.000(0.000)
0°
6°
`
Note: Eject hole , oriented hole and mold mark is optional
.
Mar. 2012
Rev. 1. 1
BCD Semiconductor Manufacturing Limited
15
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