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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Features
* * * * * * * On Chip Hall Sensor Rotor-Locked Shutdown Automatically Restart Built-in Zener Protection for Output Driver Operating Voltage: 1.8V~5.75 V Output Current: IO( AVE ) = 400 mA Lead Free Packages: SIP-4L and SOT89-5L
General Description
AH291 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-collector drivers for motor's coil driving, automatic lock shutdown and restart function relatively. 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
AH291 - X X X
Package P: SIP-4L Y: SOT89-5L
Lead L : Lead Free
Packing -B : -7/-13 : Bulk 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
Package Code P Y
Packaging (Note 2) SIP-4L SOT89-5L
Quantity
Lead-free
AH291-P AH291-Y
Tube/Bulk Part Number Suffix 1000 -B NA NA
7" Tape and Reel Part Number Suffix NA NA 2500/Tape & Reel -13 Quantity
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.
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Pin Assignment
291
Front View
1 : Vdd 2 : DO 3 : DOB 4 : GND
Vdd 1 GND 2 DO 3 SOT89-5L AH291
5 NC
7 DOB 4
12
3
4
SIP-4L
Pin Descriptions
Name Vdd DO DOB GND NC Description Input Power Output Pin Output Pin Ground Not Connected
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Block Diagram
( SIP-4L )
Vdd 1
Lock Shutdown and Automatic Recovery Regulator
2
Hall Plate
DO
Amp.
Control Logic
3
DOB
4 GND
Typical Application Circuit
1.8V/5.75V
V dd
D2
D1
291
L2 L1
1
2
3
4 GND
C3 DO
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.
DOB
R1 C1
R2 C2
1.8V/5.75V Brush-Less DC Fan
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Absolute Maximum Ratings
Characteristics Operating Supply Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temperature
( TA = 25C )
Symbol Vdd IO(AVE) IO(PEAK) PD Topr Tstg Tj SIP-4L SOT89-5L
Rating 8 400 700 550 800 -20 ~ 100 -55 ~ 150 150
Unit V mA mW C C C
Electrical Characteristics
Characteristics Supply Voltage Supply Current Lock Protection On Lock Protection Off Output Saturation Voltage Output On Resistance Output Zener-Breakdown Voltage
*Note:
( TA = 25 C, Vdd = 5V, unless otherwise specified )
Symbol Vdd Idd Tlrp-on Tlrp-off
Conditions Operating Operating
Min. 1.8* 2.4 -
Typ. 2.6 0.4 3 300 600 1.75 15
Max. 5.75 4.0 3.6 -
Unit V mA Sec Sec mV ohm V
VOUT (SAT )
Rds(on) Vz
IO = 180mA IO = 350mA
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
Mode Rotating Rotating Lockup protection activated
AH291 Rev. 3
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AH291
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 RP 12 10 8 6 4 ON 2 OP VSAT B rp 0 Bop M a g n e tic F lu x D e n s ity in G a u s s Output Voltage in Volts OFF OFF
DO
12 10 8 6 4 RP VSAT B rp 0 Bop M a g n e tic F lu x D e n s ity in G a u s s 2 ON OP
S
Marking side
S
Marking side
N
( SIP4 )
N
( SOT89-5 )
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Performance Characteristics
(1) SIP-4L TA (C) PD (mW) TA (C) PD (mW) 25 550 105 198 50 440 110 176 60 396 115 154 70 352 120 132 80 308 125 110 85 286 130 88 90 264 135 66 95 242 140 44 100 220 150 0
P D (m W ) 600 500 400 300 200 100 0 0 25
P o w e r D iss ip a tio n C u rve
50
75
100
125
150 T A (C )
(2) SOT89-5L TA (C) PD (mW) TA (C) PD (mW) 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 D (mW )
900 800 700 600 500 400 300 200 100 0 0 25
Power Dissipation Curve
50
75
100
125
150
T A (C)
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Marking Information
(1) SIP-4L
( Front View ) Part Number
291
Y WW X x
Internal Code a~z : Lead Free Y :Year: "1" = 2001 "2" = 2002 WW : Nth week 01~52 X : Internal Code: A~Z
(2) SOT89-5L
5
4
7
Y : Year: 0-9 M : Month: A~L
291 Y M X
X : Internal code a~z : Lead Free
1
2
3
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(1) SIP-4L
(unit: mm)
Active Area Depth
Marking side
Package Sensor Location
1.97mm 1.04mm
0.7mm
1
2
3
4
Package Dimension
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(2) SOT89-5L
( Continued )
Sensor Location
AH291 Rev. 3
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AH291
LOW VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
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.
AH291 Rev. 3
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