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AH287
HIGH 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: 3.8V~28V Output Current: IO(AVE) = 400mA Lead Free Packages: SIP-4L and SOT89-5L (Note 1) SIP-4L and SOT89-5L: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 2)
General Description
AH287 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-drain 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.
Typical Application Circuit
24V D2
287
D1
L2
L1
1
2
3
4
GND
DOB D3 C1 DO 48V 48V
Note: The optional Capacitor C1 and Diode D3 are for power stabilization. C1 is recommended to be E-Cap., luF/25V; D3 is recommended to be Zener Diode, VZ =27V. Which C1and D3 value need to be fine tuned to optimize design for different coils and power suppliers.
24V Brush-Less DC Fan
AH287 Rev. 10 DS31042
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(c) Diodes Incorporated
AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Ordering Information
AH 287 - X X - X
Package P : SIP-4L Y : SOT89-5L
Package Code P P Y Y Packaging (Note 3) SIP-4L SIP-4L SOT89-5L SOT89-5L
Lead Free L : Lead Free (Note 1) G : Green
Bulk Part Number Quantity Suffix 1000 -B 1000 -B NA NA NA NA
Packing B : Bulk 13 : Tape & Reel
13" Tape and Reel Part Number Quantity Suffix NA NA NA NA 2500/Tape & Reel -13 2500/Tape & Reel -13
Device AH287-PL-B AH287-PG-B AH287-YL-13 AH287-YG-13
Notes:
1. AH287-YL-13 will be replaced by AH287-YG-13 2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 3. 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. 4. Reverse taping as shown on Diodes Inc. Surface Mount (SMD) Packaging document AP02007, which can be found on our website http://www.diodes.com/datasheets/ap02007.pdf.
Pin Assignment
( Top View ) 287
1 : Vdd 2 : DO 3 : DOB 4 : GND 12 3 4
( Top View ) Vdd 1 GND 2 DO 3 SOT89-5L 287 5 NC
7 DOB 4
SIP-4L
AH287 Rev. 10 DS31042
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Pin Descriptions
Pin Name Vdd DO DOB GND NC Description Input Power Output Pin Output Pin Ground Not Connected
Block Diagram
Vdd
Lock Shutdown and Automatic Recovery Regulator
DO
Hall Plate
Amp.
Control Logic
DOB
GND
AH287 Rev. 10 DS31042
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Absolute Maximum Ratings
Symbol Vdd IO
(TA = 25C)
Characteristics Supply Voltage Output Current IO(AVE) IO(PEAK) SIP-4L SOT89-5L SIP-4L SOT89-5L
Rating 30 400 400 700 550 800 -55 ~ 150 150 227 156
Unit V mA mA mA mW mW C C C/W C/W
PD TST TJ JA
Power Dissipation Storage Temperature Maximum Junction Temperature Thermal Resistance Junction-to-Case (Note 5)
SIP-4L SOT89-5L
TA TJ Tc
JA
JC
Notes:
5.
JA should be confirmed with what heat sink thermal resistance. If no heat sink contacting, JA is almost the same as JC..
Recommended Operating Conditions
Symbol Vdd TA
Notes:
Characteristic Supply Voltage (Note 6) Operating Ambient Temperature
Conditions Operating Operating
Min 3.8 -40
Max 28 100
Unit V C
6. Please watch out the current limit issue when the operation voltage is over 26.4V, because of the different efficiency in the coil.
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Electrical Characteristics
Symbol Idd IOFF TLRP-ON TLRP-OFF VOUT(SAT) RDS(ON) Vz Truth Table INH L -
(TA = 25 C, Vdd =24V, unless otherwise specified)
Characteristics Supply Current Output Leakage Current Locked Protection On Locked Protection Off Output Saturation Voltage Output On Resistance Output Zener-Breakdown Voltage
Conditions Operating VOUT=24V
Min 0.4 2.4 42
Typ. 2.0 < 0.1 0.46 2.76 450 680 2.25 55
Max 4.0 10 0.6 3.6 700 800 3.5 65
Unit mA A Sec Sec mV mV ohm V
IO=200mA IO=300mA IO=200mA
IN+ L H -
CT L L H
OUT1 H L off
OUT2 L H off
Mode Rotating Rotating Lockup protection activated
Magnetic Characteristics
(TA = 25 C, Vdd = 24V, unless otherwise specified, Note 7)
(1mT=10 Gauss) Symbol Bop Brp Bhy
Notes:
Characteristics Operate Point Release Point Hysteresis
Min 10 -60 --
Typ. 30 -30 60
Max 60 -10 --
Unit Gauss Gauss Gauss
7. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering.
AH287 Rev. 10 DS31042
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Operating Characteristics
DOB DO
Output Voltage in Volts
RP
24 20 16 12 8
Output Voltage in Volts
OFF
OFF
24 20 16 12 8
OP
ON
4
OP Vsat
RP
4
ON
Vsat Brp 0 Bop
Brp
0
Bop
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
S
Marking side
S
Marking side
N
( SIP-4L )
N
( SOT89-5L )
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Performance Characteristics
(1) SIP-4L TA (C) PD (mW) TA (C) PD (mW)
P D (mW )
6 00 5 00 4 00 3 00 2 00 1 00 0 0 25 50 75 10 0 125 15 0
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
Po w er D iss ipation Cu rv e
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 -4 0 0 25
Power Dissipation Curve
50
75
10 0
125
1 50
T A (C)
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Marking Information
(1) SIP-4L
( Top View ) Part Number
287 Y WW X
Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green a~z : Lead Free
(2) SOT89-5L
( Top View )
5
4
7 287 Y W X
1
2
3
Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : Internal code A~Z : Green a~z : Lead Free
AH287 Rev. 10 DS31042
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(1) Package type: SIP-4L
(All Dimensions in mm)
Marking side
1.10.1mm
1.950.1mm
0.7 mm
1
2
3
4
Active Area Depth
Package Dimension
Sensor Location
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(2) Package type: SOT89-5L
(Continued)
Sensor Location
AH287 Rev. 10 DS31042
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AH287
HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER
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