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AH284
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~20 V Output Current: IO(AVE) = 500mA for SIP-4/SOT89-5 Lead Free Finish/RoHS Compliant for Lead Free products (Note 1) Lead Free Packages: SIP-4L and SOT89-5L
General Description
AH284 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.
Ordering Information
AH284
-
XXX
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 Packaging Code (Note 2)
P Y SIP-4L SOT89-5
Tube/Bulk Part Number Quantity Suffix
1000 NA -B NA
7" Tape and Reel Part Number Quantity Suffix
NA 2500/Tape & Reel NA -13
Lead-free
AH284-P AH284-Y
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.
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Pin Assignment
284
Front View
1 : Vdd 2 : DO 3 : DOB
Vdd 1 GND 2 DO 3 SOT89-5L 284
5 NC
12
3
4
4 : GND
7 DOB 4
SIP-4L
Pin Descriptions
Name Vdd DO DOB GND NC Description Input Power Output Pin Output Pin Ground Not Connected
Block Diagram
V dd 1
Lock Shutdown and Automatic Recovery Regulator
2
Hall Plate
DO
Amp.
Control Logic
3
DOB
4 GND
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Typical Application Circuit (SIP-4L)
12V
Vdd
D2
D1
284
L2
L1
1
2
3
4 GND
C3
DOB
DO
Notes: R1, R2: typical 56 C1, C2, C3: typical 2.2 F The R, C value need to be fine tuned based on coils design.
R1 C1
R2 C2
12V Brush-Less DC Fan
Absolute Maximum Ratings
Characteristics Supply Voltage Output Current Power Dissipation Operating Temperature Storage Temperature Maximum Junction Temp. Thermal Resistance
(TA = 25C) Symbol IO (AVE) PD Vdd SIP4/SOT89-5 IO (PEAK) SIP4 SOT89-5 Topr Tstg Tj Rating 24 500 700 550 800 -40 ~ 100 -55 ~ 150 150 227 156
Tc
Unit V mA mW
C C C C/W
JA
TA TJ
SIP4 SOT89-5
JA JC
Note:
JA
should be confirmed with what heat sink thermal resistance. If no heat sink contacting,
JA
is almost the same as
JC .
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Electrical Characteristics
Characteristics Supply Voltage Supply Current Output Leakage Current Locked Protection On Locked Protection Off Output Saturation Voltage Output On Resistance Output Zener-Breakdown Voltage Truth Table INH L -
(TA = 25 C, Vdd =12V, unless otherwise specified) Symbol Vdd Idd Ioff Tlrp-on Tlrp-off Conditions Operating Operating VOUT = 24V Min. 3.8 0.4 2.4 35 Typ. 2.0 < 0.1 0.5 3 375 625 1.25 42 Max. 20 4.0 10 0.6 3.6 500 900 1.67 60 Unit V mA A Sec Sec mV ohm V
VOUT (SAT )
Rds(on) Vz
IO = 300mA IO = 500mA IO = 300mA
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 = 12V, unless otherwise specified)
(1mT = 10 Gauss) Characteristics Operation Point Release Point Hysteresis Symbol Bop Brp Bhy Min. 10 -60 -Typ. 30 -30 60 Max. 60 -10 -Unit Gauss Gauss Gauss
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Operating Characteristics
DOB DO
Output Voltage in Volts
Output Voltage in Volts
RP
12 10 8 6 4 2
OFF
OFF
12 10 8 6 4 2
OP
ON
OP VSAT
RP
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
( SIP4 )
N
( SOT89-5 )
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Performance Characteristics
TA (C) PD (mW) TA (C) PD (mW)
P D (m W ) 600 500 400 300 200 100 0 0 25
(SIP-4L)
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 o w e r D issip a tio n C u rve
50
75
100
125
150 T A (C )
Performance Characteristics
TA (C) PD (mW) TA (C) PD (mW)
P D (m W )
900 800 700 600 500 400 300 200 100 0 0 25
(SOT89-5L)
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 t io n C u r v e
50
75
100
125
150
T A (C )
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Marking Information
(1) SIP-4L
( Front View ) Part Number
284 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
(Top View)
5
4
7
Y : Year: 0-9 M : Month: A~L
284 Y M X
X : Internal code a~z : Lead Free
1
2
3
AH284 Rev. 3
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AH284
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
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(2) SOT89-5L
(Continued)
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.
AH284 Rev. 3
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(c) Diodes Incorporated

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