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 AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
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
General Description
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
Package Y: SOT89-5L
Lead-Free L : Lead Free
Packing -7/-13 : Taping
Note:
1.
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
1 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Pin Assignment
Vdd 1 GND 2 DO 3 SOT89-5L AH293
5 RD
7 DOB 4
Pin Descriptions
Symbol RD Vdd DO DOB GND Description Rotor-State Detection Input Power Output Pin Output Pin Ground
AH293 Rev. 2
2 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Block Diagram
V dd 2
Lock shutdown and Automatic recovery Regulator
3
Hall Plate
DO
Amp.
Control Logic
4
DOB
5 GND
1 RD
Typical Application Circuit
D2 V dd (1.8V/5.75V) R pu D1
1 2 3 4 5
293
Coil 2 GND Coil 1
RD (alarm)
Notes: R1, R2: typical 56 O C1, C2, C3: typical 2.2 F The R, C value need to be fine tuned based on coils design.
C3
R1 C1
R2 C2
1.8V/5.75V DC Brush-Less Fan with RD Output Function
AH293 Rev. 2
3 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Absolute Maximum Ratings
Characteristics Operating Supply Voltage Output Current Power Dissipaton Operating Temperature Storage Temperature Maximum Junction Temperature
( TA = 25C )
Symbol Vdd IO (AVE) IO (PEAK) PD Top Tst Tj
Rating 8 400 700 800 -20 ~ 100 -55 ~ 150 150
Unit V mA mW C C C
Electrical Characteristics
Characteristics Supply Voltage Supply Current Locked Protection On Locked Protection Off Output Saturation Voltage Output On Resistance RD Output Vds Output Zener-Breakdown Voltage
*Note:
( TA = 25 C, Vdd = 5V, unless otherwise specified )
Symbol Vdd Idd Tlrp-on Tlrp-off
VOUT( sat )
Conditions Operating Operating
Min. 1.8* 2.4 -
Typ. 2.6 0.4 3 300 600 1.75 0.5 15
Max. 5.75 4.0 3.6 -
Unit V mA Sec Sec mV ohm V V
IO = 180mA IO = 350mA IO = 10mA
Rds(on) Vol Vz
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
4 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Magnetic Characteristics
Characteristics Operation Point Release Point Hysteresis
( TA = 25 C, Vdd = 5V, unless otherwise specified ) ( 1mT = 10 Gauss ) Symbol Bop Brp Bhy Min. --60 -Typ. 30 -30 60 Max. 60 --Unit Gauss Gauss Gauss
Operating Characteristics
DOB
Output Voltage in Volts Output Voltage in Volts
DO
RP
12 10 8 6 4
OFF
OFF
12 10 8 6 4
OP
ON
2
OP Vsat
RP Vsat
2
ON
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
5 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Performance Characteristics
(1) SOT89-5L TA (C) PD (mW) TA (C) PD (mW)
P D (m W )
900 800 700 600 500 400 300 200 100 0 0 25 50 75 100 125 150
25 800 105 288
50 640 110 256
60 576 115 224
70 512 120 192
75 480 125 160
80 448 130 128
85 416 135 96
90 384 140 64
95 352 145 32
100 320 150 0
P o w e r D is s ip a tio n C u rve
T A (C )
Marking Information
(1) SOT89-5L
5
4
7
Y : Year: 0-9 M : M onth: A~L
293 Y M X
X : Internal code a~z : Lead Free
1
2
3
AH293 Rev. 2
6 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated
AH293
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(1) SOT89-5L
(unit:mm )
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.
AH293 Rev. 2
7 of 7 www.diodes.com
JANUARY 2007
(c) Diodes Incorporated


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