Diodes AH293-Y Low voltage hall-effect smart fan motor controller Datasheet

AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
General Description
Features
•
•
•
•
•
•
•
On Chip Hall Sensor
Rotor-Locked Shutdown
Automatically Restart
Rotor-State Detection (RD) Output
Built-in Zener Protection for Output Driver
Operating Voltage: 1.8V~5.75 V
Output Current: IO( AVE ) = 400 mA
•
Lead Free Finish/RoHS Compliant for Lead Free
products (Note 1)
Packages: SOT89-5L
•
AH293 is a monolithic fan motor controller with Hall sensor’s
capability. It contains two complementary open-collector
transistors for Motor’s coil driving, automatic lock current
shutdown, and recovery protections. Also, rotor-state detection
(RD) output is for speed detection.
Rotor-lock shutdown detection circuit turns off the output driver
when the rotor is blocked to avoid coil overheat. Then, the
automatic recovery circuit will restart the motor. These protected
actions are repeated and periodic during the blocked period. Until
the blocking is removed, the motor recovers and runs normally.
Ordering Information
AH293 - X X X
Note:
1.
Package
Lead-Free
Y: SOT89-5L
L : Lead Free
Packing
-7/-13 :
Taping
RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
Lead-free
AH293-Y
Package
Code
Y
Packaging
(Note 2)
SOT89-5L
7” Tape and Reel
Quantity
Part Number Suffix
2500/Tape & Reel
-13
Note: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
AH293 Rev. 2
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AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Pin Assignment
Vdd 1
GND 2
5 RD
AH293
DO 3
74 DOB
SOT89-5L
Pin Descriptions
Symbol
RD
Vdd
DO
DOB
GND
AH293 Rev. 2
Description
Rotor-State Detection
Input Power
Output Pin
Output Pin
Ground
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AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Block Diagram
V dd
2
Lock shutdown
and
Automatic recovery
Regulator
Hall
Plate
3
DO
4
DOB
Control Logic
Amp.
5
1
GND
RD
Typical Application Circuit
D2
V dd
(1.8V/5.75V)
R pu
293
D1
Coil
2
1
2
3
4
Coil
1
5
GND
RD
(alarm)
Notes: R1, R2: typical 56 O
C1, C2, C3: typical 2.2μ F
The R, C value need to be fine tuned
based on coils design.
C3
R1
R2
C1
C2
1.8V/5.75V DC Brush-Less Fan with RD Output Function
AH293 Rev. 2
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AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Absolute Maximum Ratings
( TA = 25°C )
Characteristics
Symbol
Operating Supply Voltage
Rating
Vdd
Power Dissipaton
Operating Temperature
Storage Temperature
Maximum Junction Temperature
Electrical Characteristics
Characteristics
8
400
700
800
-20 ~ 100
-55 ~ 150
150
IO (AVE)
IO (PEAK)
PD
Output Current
Unit
Top
Tst
Tj
V
mA
mW
°C
°C
°C
( TA = 25 °C, Vdd = 5V, unless otherwise specified )
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
Vdd
Operating
1.8*
-
5.75
V
Supply Current
Locked Protection On
Locked Protection Off
Idd
Operating
2.4
-
2.6
0.4
3
300
600
1.75
0.5
15
4.0
3.6
-
mA
Sec
Sec
Tlrp-on
Tlrp-off
Output Saturation Voltage
Output On Resistance
RD Output Vds
Output Zener-Breakdown Voltage
*Note:
VOUT( sat )
IO = 180mA
IO = 350mA
Rds(on)
Vol
Vz
IO = 10mA
mV
ohm
V
V
The output of IC will be switched after the supply voltage is over 1.8V, but the magnetic characteristics won't be normal until the supply is
over 2.0V.
Truth Table
INH
L
-
IN+
L
H
-
CT
L
L
H
OUT1
H
L
off
OUT2
L
H
off
RD
L
L
off
Mode
Rotating
Rotating
Lockup protection activated
Latch-type RD output is low during rotation and high during stop
AH293 Rev. 2
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AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Magnetic Characteristics
( TA = 25 °C, Vdd = 5V, unless otherwise specified )
( 1mT = 10 Gauss )
Characteristics
Symbol
Min.
Typ.
Max.
Unit
Bop
Brp
Bhy
--60
--
30
-30
60
60
---
Gauss
Gauss
Gauss
Operation Point
Release Point
Hysteresis
Operating Characteristics
RP
DO
12
Output Voltage in Volts
Output Voltage in Volts
DOB
OFF
10
8
6
4
ON
2
OP
Vsat
OFF
12
OP
10
8
6
4
RP
2
ON
Vsat
Brp
0
Bop
Magnetic Flux Density in Gauss
Brp
0
Bop
Magnetic Flux Density in Gauss
S
Marking
side
N
( SOT89-5 )
AH293 Rev. 2
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AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Performance Characteristics
(1) SOT89-5L
TA (°C)
25
50
60
70
75
80
85
90
95
100
PD (mW)
800
640
576
512
480
448
416
384
352
320
TA (°C)
105
110
115
120
125
130
135
140
145
150
PD (mW)
288
256
224
192
160
128
96
64
32
0
P D (m W )
P o w e r D is s ip a tio n C u rve
900
800
700
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T A (°C )
Marking Information
(1) SOT89-5L
4
7
5
Y : Year: 0-9
M : M onth: A~L
293 Y M X
1
AH293 Rev. 2
2
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X : Internal code
a~z : Lead Free
3
JANUARY 2007
© Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Package Information
(unit:mm )
(1) SOT89-5L
Sensor Location
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
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