Diodes AH284-P Hall-effect smart fan motor controller Datasheet

AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
General Description
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
•
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
Note:
1.
-
X XX
Package
Lead
P: SIP-4L
Y: SOT89-5L
L : Lead Free
Packing
-B :
-7/-13:
Bulk
Taping
RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
Lead-free
Lead-free
AH284-P
AH284-Y
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
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
Front View
284
Vdd 1
1 : Vdd
2 : DO
GND 2
5 NC
284
3 : DOB
1 2
3
DO 3
4 : GND
4
SIP-4L
74 DOB
SOT89-5L
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
Hall
Plate
Amp.
2
DO
3
DOB
Control Logic
4
GND
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Typical Application Circuit (SIP-4L)
12V
D2
Vdd
D1
284
1
2
3
L2
L1
4
GND
C3
DOB
DO
Notes: R1, R2: typical 56 Ω
C1, C2, C3: typical 2.2µ F
R1
R2
The R, C value need to be fine tuned
based on coils design.
C1
C2
12V Brush-Less DC Fan
Absolute Maximum Ratings
(TA = 25°C)
Characteristics
Symbol
Supply Voltage
IO (PEAK)
Power Dissipation
SIP4
SOT89-5
PD
Operating Temperature
Storage Temperature
Maximum Junction Temp.
Topr
Tstg
Tj
SIP4
SOT89-5
θ JA
Thermal Resistance
Unit
24
500
700
550
800
-40 ~ 100
-55 ~ 150
150
227
156
Vdd
SIP4/SOT89-5
IO (AVE)
Output Current
Rating
V
mA
mW
°C
°C
°C
°C/W
TA
TJ
Tc
θ JA
θ JC
Note:
θ JA
should be confirmed with what heat sink thermal resistance. If no heat sink contacting,
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θ JA
is almost the same as
θ JC .
JANUARY 2007
© Diodes Incorporated
AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Electrical Characteristics
Characteristics
(TA = 25 °C, Vdd =12V, unless otherwise specified)
Symbol
Conditions
Min.
Typ.
Max.
Unit
Supply Voltage
Vdd
Operating
3.8
-
20
V
Supply Current
Output Leakage Current
Locked Protection On
Locked Protection Off
Idd
Ioff
Operating
VOUT = 24V
0.4
2.4
35
2.0
< 0.1
0.5
3
375
625
1.25
42
4.0
10
0.6
3.6
500
900
1.67
60
mA
µA
Sec
Sec
Tlrp-on
Tlrp-off
Output Saturation Voltage
Output On Resistance
Output Zener-Breakdown Voltage
Truth Table
INH
L
-
IN+
L
H
-
IO = 300mA
IO = 500mA
IO = 300mA
VOUT (SAT )
CT
L
L
H
Rds(on)
Vz
OUT1
H
L
off
OUT2
L
H
off
mV
ohm
V
Mode
Rotating
Rotating
Lockup protection activated
Magnetic Characteristics (TA = 25 °C, Vdd = 12V, unless otherwise specified)
(1mT = 10 Gauss)
Characteristics
Symbol
Min.
Typ.
Max.
Unit
Operation Point
Release Point
Hysteresis
Bop
Brp
Bhy
10
-60
--
30
-30
60
60
-10
--
Gauss
Gauss
Gauss
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Operating Characteristics
DO
12
RP
Output Voltage in Volts
Output Voltage in Volts
DOB
OFF
10
8
6
4
2
ON
OP
0
8
6
4
Brp
Magnetic Flux Density in Gauss
ON
0
Bop
Magnetic Flux Density in Gauss
S
S
Marking
side
Marking
side
N
AH284 Rev. 3
2
RP
Bop
( SIP4 )
OP
10
VSAT
VSAT
Brp
12
OFF
N
( SOT89-5 )
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Performance Characteristics
TA (°C)
PD (mW)
TA (°C)
PD (mW)
25
550
105
198
(SIP-4L)
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
P D (m W )
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T A (°C )
Performance Characteristics
TA (°C)
PD (mW)
TA (°C)
PD (mW)
25
800
105
288
50
640
110
256
P D (m W )
(SOT89-5L)
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
900
800
700
600
500
400
300
200
100
0
0
25
50
75
100
125
150
T A (°C )
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Marking Information
(1) SIP-4L
( Front View )
Part Number
Internal code a~z: Lead Free
284
Y WW X x
Y :Year: "1" = 2001
"2" = 2002
WW : Nth week 01~52
X : Internal Code : A~Z
(2) SOT89-5L
(Top View)
4
7
5
Y : Year: 0-9
M : Month: A~L
284 Y M X
1
AH284 Rev. 3
2
X : Internal code a~z : Lead Free
3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(unit: mm)
(1) SIP-4L
Active Area Depth
Package Sensor Location
Marking side
1.97mm
1.04mm
1
0.7mm
2
3
4
Package Dimension
AH284 Rev. 3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Information
(Continued)
(2) 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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© Diodes Incorporated
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