Diodes AH284-YG-13 Hall-effect smart fan motor controller Datasheet

AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Description
Pin Assignments
The AH284 is a single-chip solution for driving two-coil
brushless direct current (BLDC) fans and motors. The device
includes a Hall-effect sensor, dynamic offset correction and
two complementary open-drain output drivers with internal
Zener diode protection.
(Top View)
(Top View)
284
Vdd
1
GND
2
1 : Vdd
2 : DO
To help protect the motor coils, the AH284 provides Rotor
Lock Protection which shuts down output drives if rotor lock is
detected. The device automatically re-starts when the rotor
lock is removed.
3 : DOB
5 NC
284
DO 3
74 DOB
4 : GND
1 2
3
4
SOT89-5L
SIP-4L
The AH284 is available in SIP4 and SOT89-5L packages.
Features
Applications
•
•
•
•
•
•
•
•
•
•
Single-chip solution
Operating Voltage: 3.8V to 20V
Built-in Hall sensor and input amplifier
Rotor Lock Protection (Lock detection, output shutdown
and automatic re-start)
Built-in Zener protection for output driver
Average output current up to 500mA
Packages: SIP-4L and SOT89-5L
Green Molding Compound
Two-coil BLDC cooling fans
Low to medium voltage, low power BLDC motors
Typical Application Circuit (Note 1)
12V
D2
Vdd
D1
284
1
2
3
L2
L1
R1
R2
C1
C2
4
GND
D3
DOB
C3
DO
Notes:
1. Typically it is recommended to us a 56 Ohm resistor for R1 and R2 and a 2.2μF E-Cap capacitor for C1, C2 and C3. These values
may need to be optimized depending on the coils used.
To help with IC protection it’s advised to add a Zener diode between Vdd and ground. The Zener diode should be chosen to help
prevent the supply voltage exceeding the maximum rating of the device.
AH284
Document number: DS31051 Rev. 11 - 2
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Pin Descriptions
Pin Name
Description
Vdd
Input Power
DO
Output Pin
DOB
Output Pin
GND
Ground
NC
Not Connected
Functional Block Diagram
Vdd
Lock detect,
shutdown and
automatic re-start
Regulator
DO
Hall
Plate
Amp.
Control Logic
DOB
GND
AH284
Document number: DS31051 Rev. 11 - 2
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Absolute Maximum Ratings (TA = 25°C)
Symbol
Characteristics
Vdd
Supply Voltage
IO
Output Current
SIP-4L
SOT89-5L
IO (AVE)
IO (PEAK)
SIP-4L
SOT89-5L
PD
Power Dissipation
TST
TJ
Storage Temperature
Maximum Junction Temperature
θJA
Thermal Resistance Junction to
Case (Note 2)
SIP-4L
SOT89-5L
Rating
Unit
24
500
500
700
550
800
-55 ~ 150
150
V
mA
mA
mA
mW
mW
°C
°C
227
156
°C/W
°C/W
TA
TJ
Tc
θ JA
θ JC
Notes:
2. θJA should be confirmed with heat sink thermal resistance. If there is no heat sink contact, θJA will almost be the same as θJC..
Recommended Operating Conditions
Symbol
Vdd
TA
Characteristic
Supply Voltage
Operating Ambient Temperature
AH284
Document number: DS31051 Rev. 11 - 2
Conditions
Min
Max
Unit
Operating
Operating
3.8
-40
20
100
V
°C
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Electrical Characteristics (TA = 25 °C, Vdd = 12V, unless otherwise specified)
Symbol
Idd
IOFF
Characteristics
Conditions
TRLP-ON
TRLP-OFF
Supply Current
Output Leakage Current
Rotor Lock Protection On Time
Rotor Lock Protection Off Time
VOUT(SAT)
Output Saturation Voltage
RDS(ON)
VZ
Output On Resistance
Output Zener-Breakdown Voltage
Operating
VOUT = 24V
IO = 300mA
IO = 500mA
IO = 300mA
Min
Typ.
Max
Unit
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
mV
ohm
V
Truth Table
IN-
IN+
CT
OUT1
OUT2
Mode
H
L
-
L
H
-
L
L
H
H
L
off
L
H
off
Rotating
Rotating
Lockup protection activated
Magnetic Characteristics (TA = 25 °C, Vdd = 12V, unless otherwise specified, Note 3)
(1mT = 10 Gauss)
Symbol
Bop
Brp
Bhy
Notes:
Characteristics
Operation Point
Release Point
Hysteresis
Min
Typ.
Max
Unit
10
-60
-
30
-30
60
60
-10
-
Gauss
Gauss
Gauss
3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
AH284
Document number: DS31051 Rev. 11 - 2
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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
4
2
RP
ON
0
Bop
Magnetic Flux Density in Gauss
S
S
Marking
side
Marking
side
N
Document number: DS31051 Rev. 11 - 2
6
Brp
Magnetic Flux Density in Gauss
AH284
8
Bop
( SIP-4L )
OP
10
VSAT
VSAT
Brp
12
OFF
N
( SOT89-5L )
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AH284
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
P D (mW )
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
Pow er D iss ipation Curv e
6 00
5 00
4 00
3 00
2 00
1 00
0
0
25
(2) SOT89-5L
TA (°C)
PD (mW)
TA (°C)
PD (mW)
25
800
105
288
50
50
640
110
256
P D (mW )
60
576
115
224
75
70
512
120
192
75
480
125
160
10 0
80
448
130
128
125
85
416
135
96
90
384
140
64
15 0
T A (°C )
95
352
145
32
100
320
150
0
Power Dissipation Curve
900
800
700
600
500
400
300
200
100
0
-4
00
25
50
75
10 0
125
1 50
T A (°C)
AH284
Document number: DS31051 Rev. 11 - 2
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Ordering Information
AH 284 - X G - X
Device
AH284-PG-B
AH284-YG-13
Notes:
Package
Green
Packing
P : SIP-4L
Y : SOT89-5L
G : Green (Note 4)
B : Bulk
13 : Tape & Reel
Package
Code
Packaging
(Note 5, 6)
P
Y
SIP-4L
SOT89-5L
Bulk
Part Number
Quantity
Suffix
1000
-B
NA
NA
13” Tape and Reel
Part Number
Quantity
Suffix
NA
NA
2500/Tape & Reel
-13
4. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
5. 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.
6. 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.
Marking Information
(1) SIP-4L
( Top View )
Part Number
Y : Year : 0~9
WW : Week : 01~52, "52" represents
52 and 53 week
X : Internal Code : A~Z : Green
284
Y WW X
(2) SOT89-5L
( Top View )
4
7
5
284 Y W X
1
AH284
Document number: DS31051 Rev. 11 - 2
2
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
3
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Outline Dimensions (All Dimensions in mm)
(1) Package type: SIP-4L
Marking side
1.95士0.1mm
1.1士0.1mm
1
0.7 mm
2
3
4
Sensor Location
Active Area Depth
Package Dimension
AH284
Document number: DS31051 Rev. 11 - 2
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Package Outline Dimensions (Continued)
(2) Package type: SOT89-5L
Sensor Location
AH284
Document number: DS31051 Rev. 11 - 2
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AH284
HALL-EFFECT SMART FAN MOTOR CONTROLLER
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DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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Copyright © 2010, Diodes Incorporated
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AH284
Document number: DS31051 Rev. 11 - 2
10 of 10
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June 2010
© Diodes Incorporated
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