AH5792

AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Description
Pin Assignments
( Top View )
The AH5792 is a single chip solution for driving single-coil
brush-less DC fans and motors. The AH5792 employs a
bidirectional full bridge driver output stage for single coil fan
motor applications. The device includes features such as
Rotor Lock Protection with rotor lock detection and automatic
self-restart to avoid damage to the coil when the rotor is
blocked.
O2
1
VSS
2
O1
3
5
FG
NC
4
Vdd
SOT553
The AH5792 also offers an externally controlled Tachometer
(Frequency Generator Pin) open -drain output which makes it
easier to connect with external interface such as hardware
monitoring. The FG is half (1/2) the magnetic change
frequency.
( Top View )
The devices are packaged in SOT553 and SOT89-5L small
outline packages for applications such as small motors like
vibration motors or ultra thin cooling fans.
O2
1
5 FG
Vss
2
NC
O1 3
74 Vdd
SOT89-5L
Features
Applications
•
•
•
•
•
•
•
•
•
•
•
Support single-phase full wave min fan driver
Built-in Hall sensor input amplifier
Low voltage startup ( Vdd=1.8V )
Lock detection and automatic self-restart
Without external timing capacitor, Reduces the numbers
of external component required
FG output
Low profile package : SOT553 and SOT89-5L
“Green” Molding Compound
AH5792
Document number: DS314641 Rev. 6 - 2
3.3V / 5V Min. DC Fans (Eight Pole)
Low Voltage / BLDC Motors
Micro-Vibration Motors
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Typical Application Circuit (Note 1)
SYSTEM
POWER
10Kohm
SYSTEM
POWER
Vdd
D1
C1
FG
FG
Dz
AH5792
O1
O2
V SS
Notes:
1. Reverse connection of power supply may break the device. A countermeasure is needed such as using reverse power protection
diode D1 between power supply and Vdd terminal. In such case of using reverse power protection diode D1 because of there is no
way to return current to power supply, please take necessary measures like below.
- Connect Dz (Zener diode) between Vdd and Vss terminal, not to exceed the absolute maximum rating voltage.
- Connect a capacitor C1 between Vdd and Vss terminal, to make the path of return current to power supply.
The AH5792 has an open-drain tachometer FG output that follows the half (1/2) the magnetic change frequency. A pull-up resistor
(10Kohm, typically for System Power = 5V) connected to a supply voltage.
Pin Descriptions (Note 2)
Pin Name
O1
Vdd
Vss
FG
O2
NC
Notes:
Description
Output driving & sinking pin 1
Power supply pin
Ground pin
Frequency Generator (Note 2)
Output driving & sinking Pin 2
No Connection
2. The FG is half (1/2) the magnetic change frequency.
AH5792
Document number: DS314641 Rev. 6 - 2
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Functional Block Diagram
Vdd
Power
FG
Frequency
Generator
Hall
Sensor
O1
Logic
Block
AMP
Full Bridge
Driver
O2
Lock
Detector
V SS
Operating (Note 3, 4, 5)
Magentic
S
N
Out 1
Out 2
Ton
FG
Normal spinning
Toff
Mechanical lock
motor locked detected
Notes:
“Re-start spinning”
motor locked cleared
3. In “Normal spinning, the FG shall change its state at each rising edge of OUT2. In “Mechanical lock”, the FG state is kept as the
same as the moment of motor locked detected.
4. When magnetic is locked as “S” pole, then out1 is kept on “L”, out2 is a clock with Ton/Toff ratio. When magnetic is locked at
“N” pole, then out 2 is kept on “L”, out 1 is a clock with Ton/Toff ratio.
5. When “Re-start spinning” occurs, the motor shall ramp up to the “Normal Spinning” speed from zero. It depends on the motor
characteristics.
AH5792
Document number: DS314641 Rev. 6 - 2
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© Diodes Incorporated
AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Absolute Maximum Ratings (TA = 25°C, unless otherwise noted)
Symbol
Vdd
IO(PEAK)
Characteristics
Values
Unit
6
V
SOT553
400
mA
SOT89-5L
500
mA
SOT553
SOT89-5L
230
800
mW
mW
Supply voltage
Maximum Output Current (Peak)
PD
Power Dissipation
TST
Storage Temperature Range
o
-65 ~ 150
C
Recommended Operating Conditions (TA = 25°C)
Symbol
Vdd
TA
Parameter
Supply Voltage
Operating Temperature Range
Conditions
Rating
Unit
Operating
Operating
1.8 to 5.0
-40 to +100
V
°C
Electrical Characteristics (TA = 25°C, Vdd = 5.0V)
Symbol
Idd
Characteristic
Supply Current
Conditions
No Load
IOUT = 200mA
(For SOT553)
IOUT = 300mA
(For SOT89-5L)
IOUT = 200mA
(For SOT553)
IOUT = 300mA
(For SOT89-5L)
Min
Typ.
Max
Unit
-
3.5
5
mA
4.4
-
-
V
-
-
0.6
V
-
148
-
mA
-
-
5
μA
VOH
Output Voltage High
VOL
Output Voltage Low
IOUT
Output Current
ILeak
FG Output Leakage Current
IFG
FG Output Current
VFGOL = 0.4V
5
-
-
mA
FG Output Voltage Low
IFG = 5mA
-
-
0.4
V
-
215
-
ms
-
10
-
VFGOL
TON
On Time
RDR
Duty Ratio
AH5792
Document number: DS314641 Rev. 6 - 2
RL=30Ω
TOFF / TON
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Magnetic Characteristics (TA = 25°C, Vdd = 1.8V~5.0V, Note 6)
Symbol
Bop
Brp
Bhy
Notes:
Parameter
Operate Point
Release Point
Hysteresis
Min
Typ.
(1mT = 10 G)
Max
Unit
10
-50
-
30
-30
60
50
-10
-
G
G
G
6. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
O2
O1
VOH
RP
OFF
ON
OP
Output Voltage in Volts
Output Voltage in Volts
VOH
VOL
Brp
0
OFF
OP
RP
ON
VOL
Bop
Brp
Magnetic Flux Density in Gauss
S
Marking side
Document number: DS314641 Rev. 6 - 2
Bop
Magnetic Flux Density in Gauss
S
AH5792
0
Marking side
N
N
(SOT553)
(SOT89-5L)
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Performance Characteristics
(1) SOT553
TA (°C)
25
50
60
70
80
85
90
100
110
120
130
140
150
PD (mW)
230
184
166
147
129
120
110
92
74
55
37
18
0
P D (m W )
P o w e r D is s ip a tio n C u rv e
300
200
100
0
0-4 0
25
50
75
85
100
125
150
o
TA ( C )
(2) SOT89-5L
TA (°C)
PD (mW)
TA (°C)
PD (mW)
25
800
105
288
50
640
110
256
60
576
115
224
P D (m W )
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
Power Dissipation Curve
900
800
700
600
500
400
300
200
100
0
0
-40
25
50
75
10 0
1 25
1 50
T A (°C )
AH5792
Document number: DS314641 Rev. 6 - 2
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Ordering Information
AH 5792 - X G - X
Device
AH5792-ZG-7
AH5792-YG-13
Notes:
Package
Green
Packing
Z : SOT553
Y : SOT89-5L
G : Green
7/13 : Tape & Reel
Package
Code
Z
Y
7”/13” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
2500/Tape & Reel
-13
Packaging
(Note 7 & 8)
SOT553
SOT89-5L
7. 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
8. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html
Marking Information
(1) SOT553
( Top View )
XX Y W X
Part Number
AH5792
XX : Identification Code
Y : Year : 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week;
z represents 52 and 53 week
X : A~Z : Green
Package
SOT553
Identification Code
KE
(2) SOT89-5L
7
( Top View )
5
4
XX Y W X
1
2
Part Number
AH5792
AH5792
Document number: DS314641 Rev. 6 - 2
3
XX : Identification code
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
Package
SOT89-5L
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Identification Code
KF
July 2010
© Diodes Incorporated
AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Package Outline Dimensions (All Dimensions in mm)
(1) Package Type: SOT553
1.50/1.70
1.0Typ.
CL
0.10/0.18
CL
0.32/0.58
Pin1
0.5Typ.
2.2
1.2
C
L
1.7
0.1
0.45/0.67
1.10/1.25
C
L
0.30 C
1.55/1.70
6°~8
°
A
5x-0.5
0.30 C D
D
0.30 C D
1.0Typ.
Hall Sensor
0.15/0.30(5x)
0.10 M C A-B D
B
0.55/0.62
6°~8°
Pin1
0.5Typ.
0.3
Land Pattern Recommendation
(Unit:mm)
Top View
6°~
8°
AH5792
Document number: DS314641 Rev. 6 - 2
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
Package Outline Dimensions (Continued)
(2) Package type: SOT89-5L
Sensor Location
AH5792
Document number: DS314641 Rev. 6 - 2
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© Diodes Incorporated
AH5792
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
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LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without
the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
B.
A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or
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concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,
notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes
Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2010, Diodes Incorporated
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AH5792
Document number: DS314641 Rev. 6 - 2
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© Diodes Incorporated
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