AH280
器件资料摘要：
AH280
Hall-Effect Smart Fan Driver
This datasheet contains new product information. Analog Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.7 Apr 16, 2004
1/7
Features
- On chip Hall plate
- Built-in Zener diode protection for output driver
- Built-in protection diode for power reverse
connecting
- Rotor-lock detection
- Automatically restart after release of motor
locking
- Adjustable auto restart time
- Operating voltage: 3.5~20 V
- Max Output current: I
O(AVE)
= 500mA
- Packages: SIP-5L, SOP-8L, SOP-8L EP
- Less external component
Pin Assignments
Front View
( Branded side)
15432
SIP-5L
3
4
8
7
6
5
2
1
DO
VCC
NC
DOB
GND
NC
NC
CT
( Top view )
SOP-8L / SOP-8L EP
General Description
AH280 is the integrated Hall sensor owned two
complementary outputs for motor’s coil driving, auto
locked shutdown and auto restart functions.
Functional block diagram includes that a regulator
with temperature-compensated band-gap, an
on-chip Hall voltage generator, a comparator, a
Schmitt trigger and two current output drivers. The
regulator can provide wide operational voltage
range. The Hall voltage generator is to amplify the
Hall voltage due to Hall effect. A Schmitt trigger is
to provide switching Hysteresis for noise rejection.
To avoid coil burning, rotor-lock detection circuit will
shutdown the output driver if detect rotor-lock status.
A rotation recovery circuit is to restart the motor
after rotor-lock is removed. In addition, the auto
re-start time is flexible by adjusting the capacitance
(C
T
).
Pin Descriptions
SIP-5L
Symbol P/I/O Pin # Description
CT I 1 Timing cap.
VCC P 2 Positive power supply
DO O 3 Driver output
DOB O 4 Driver inverted output
GND P 5 Ground
SOP-8L/SOP-8L EP
Symbol Pin # Description
VCC 1 Positive power supply
DO 2 Driver output
DOB 3 Driver inverted output
NC 4,6,7 Not connected for SOP8
CT 8 Timing cap.
GND 5 Ground
Hall-Effect Smart Fan Driver
This datasheet contains new product information. Analog Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.7 Apr 16, 2004
1/7
Features
- On chip Hall plate
- Built-in Zener diode protection for output driver
- Built-in protection diode for power reverse
connecting
- Rotor-lock detection
- Automatically restart after release of motor
locking
- Adjustable auto restart time
- Operating voltage: 3.5~20 V
- Max Output current: I
O(AVE)
= 500mA
- Packages: SIP-5L, SOP-8L, SOP-8L EP
- Less external component
Pin Assignments
Front View
( Branded side)
15432
SIP-5L
3
4
8
7
6
5
2
1
DO
VCC
NC
DOB
GND
NC
NC
CT
( Top view )
SOP-8L / SOP-8L EP
General Description
AH280 is the integrated Hall sensor owned two
complementary outputs for motor’s coil driving, auto
locked shutdown and auto restart functions.
Functional block diagram includes that a regulator
with temperature-compensated band-gap, an
on-chip Hall voltage generator, a comparator, a
Schmitt trigger and two current output drivers. The
regulator can provide wide operational voltage
range. The Hall voltage generator is to amplify the
Hall voltage due to Hall effect. A Schmitt trigger is
to provide switching Hysteresis for noise rejection.
To avoid coil burning, rotor-lock detection circuit will
shutdown the output driver if detect rotor-lock status.
A rotation recovery circuit is to restart the motor
after rotor-lock is removed. In addition, the auto
re-start time is flexible by adjusting the capacitance
(C
T
).
Pin Descriptions
SIP-5L
Symbol P/I/O Pin # Description
CT I 1 Timing cap.
VCC P 2 Positive power supply
DO O 3 Driver output
DOB O 4 Driver inverted output
GND P 5 Ground
SOP-8L/SOP-8L EP
Symbol Pin # Description
VCC 1 Positive power supply
DO 2 Driver output
DOB 3 Driver inverted output
NC 4,6,7 Not connected for SOP8
CT 8 Timing cap.
GND 5 Ground