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PDF AH9481 Data sheet ( Hoja de datos )
| Número de pieza | AH9481 | |
| Descripción | Single Phase Low Noise Smart Motor Driver | |
| Fabricantes | BCD | |
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Hay una vista previa y un enlace de descarga de AH9481 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Data Sheet
Single Phase Low Noise Smart Motor Driver
AH9479/80/81
General Description
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.
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.
The AH9479 is packaged in TO-94, and the
AH9480/81 is packaged in TO-95 and MSOP-8.
Features
• 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
• 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
TO-94
TO-95
MSOP-8
Mar. 2012 Rev. 1. 1
Figure 1. Package Types of AH9479/80/81
BCD Semiconductor Manufacturing Limited
1
1 page  
Single Phase Low Noise Smart Motor Driver
Absolute Maximum Ratings (Note 1)
Data Sheet
AH9479/80/81
Parameter
Supply Voltage
Peak Output Current
Continuous Output Current
FG/RD Pull-up Voltage
FG/RD Output Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Thermal Resistance
(Junction to Ambient)
ESD (Human Body Model)
ESD (Machine Model)
Symbol
VCC
IOUT_P
IOUT_C
VFG/VRD
IFG/IRD
PD
TA
TSTG
θJA
ESD
ESD
Value
18
500
300
18
10
TO-94
550
TO-95
600
MSOP-8
585
-40 to 85
-55 to 150
TO-94
227
TO-95
208
MSOP-8
214
6000
200
Unit
V
mA
mA
V
mA
mW
ºC
ºC
ºC/W
V
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
Supply Voltage
Operating Ambient Temperature
Symbol
VCC
TA
Min
2.5
-40
Max
16
85
Unit
V
ºC
Mar. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
5
5 Page 
Single Phase Low Noise Smart Motor Driver
Typical Performance Characteristics (Continued)
Data Sheet
AH9479/80/81
600
Packages: TO-94
500 TO-95
400
300
200
100
0
-50 -25
0 25 50 75 100 125 150 175
Ambient Temperature (OC)
600
500 Package: MSOP-8
400
300
200
100
0
-50 -25
0 25 50 75 100 125 150 175
Ambient Temperature (oC)
Figure 17. Power Dissipation vs. TA
Figure 18. Power Dissipation vs. TA
Mar. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet AH9481.PDF ] | |
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