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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Description
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. 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. 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.
Pin Assignments
( Top View ) O2 VSS O1 1 2 3 SOT553
( Top View )
O2 Vss 1 2 5 FG NC 7 Vdd 4
5
FG NC
4
Vdd
O1 3
SOT89-5L
Features
* * * * * * * * 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
Applications
* * * 3.3V / 5V Min. DC Fans (Eight Pole) Low Voltage / BLDC Motors Micro-Vibration Motors
AH5792
Document number: DS314641 Rev. 6 - 2
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Typical Application Circuit (Note 1)
SYSTEM POWER
10Kohm
SYSTEM POWER
D1 C1 Dz
Vdd
FG
FG
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 Frequency Generator
FG
Hall Sensor
O1
AMP
Logic Block Lock Detector
Full Bridge Driver
O2
V SS
Operating (Note 3, 4, 5)
Magentic
S N
Out 1 Out 2
FG Normal spinning
Ton
Toff Mechanical lock "Re-start spinning" motor locked cleared
motor locked detected
Notes:
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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(c) Diodes Incorporated
AH5792
SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Absolute Maximum Ratings (TA = 25C, unless otherwise noted)
Symbol Vdd IO(PEAK) PD TST Supply voltage Maximum Output Current (Peak) Power Dissipation Storage Temperature Range SOT553 SOT89-5L SOT553 SOT89-5L Characteristics Values 6 400 500 230 800 -65 ~ 150 Unit V mA mA mW mW
o
C
Recommended Operating Conditions (TA = 25C)
Symbol Vdd TA Parameter Supply Voltage Operating Temperature Range Conditions Operating Operating Rating 1.8 to 5.0 -40 to +100 Unit V C
Electrical Characteristics (TA = 25C, 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) RL=30 Min Typ. 3.5 Max 5 Unit mA
VOH
Output Voltage High
4.4
-
-
V
VOL
Output Voltage Low
-
-
0.6
V
IOUT ILeak IFG VFGOL TON RDR
Output Current FG Output Leakage Current FG Output Current FG Output Voltage Low On Time Duty Ratio
-
148 215 10
5 0.4 -
mA A mA V ms
VFGOL = 0.4V IFG = 5mA
5 -
TOFF / TON
-
AH5792
Document number: DS314641 Rev. 6 - 2
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Magnetic Characteristics (TA = 25C, Vdd = 1.8V~5.0V, Note 6)
(1mT = 10 G) Max Unit 50 -10 G G G
Symbol Bop Brp Bhy
Notes:
Parameter
Min 10 -50 -
Typ. 30 -30 60
Operate Point Release Point Hysteresis
6. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
O2 VOH Output Voltage in Volts RP OFF Output Voltage in Volts OFF OP O1 VOH
ON
OP VOL Brp 0 Bop
RP VOL Brp 0 Bop
ON
Magnetic Flux Density in Gauss
Magnetic Flux Density in Gauss
S
Marking side
S
Marking side
N
(SOT553)
N
(SOT89-5L)
AH5792
Document number: DS314641 Rev. 6 - 2
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AH5792
SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Performance Characteristics
(1) SOT553 TA (C) PD (mW) 25 230 50 184 60 166 70 147 80 129 85 120 90 110 100 92 110 74 120 55 130 37 140 18 150 0
P D (m W )
300
P o w e r D is s ip a tio n C u rv e
200
100
0 -4 00 25 50 75 85 100 125 150
o
TA ( C )
(2) SOT89-5L TA (C) PD (mW) TA (C) PD (mW)
P D (m W )
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
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
Package Z : SOT553 Y : SOT89-5L
Device AH5792-ZG-7 AH5792-YG-13
Notes:
Green
Packing 7/13 : Tape & Reel
G : Green
Package Code Z Y
Packaging (Note 7 & 8) SOT553 SOT89-5L
7"/13" Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 2500/Tape & Reel -13
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 : 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
Identification Code KE
XX Y W X
Part Number AH5792 (2) SOT89-5L
Package SOT553
( Top View ) 5 4
XX Y W X
7
1
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
Identification Code KF
July 2010
(c) Diodes Incorporated
Part Number AH5792 AH5792
Document number: DS314641 Rev. 6 - 2
Package SOT89-5L
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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
0.30 C D
0.30 C D
1.0Typ.
C L
A
1.0Typ. 5x-0.5 0.10/0.18
6~8
C L
D
0.45/0.67
1.55/1.70
1.10/1.25
0.32/0.58
Hall Sensor
0.30 C
Pin1 0.5Typ.
6~8
1.2
0.15/0.30(5x)
B
0.10 M C A-B D
Pin1 0.5Typ. 0.3 Land Pattern Recommendation (Unit:mm) Top View
6~ 8
AH5792
Document number: DS314641 Rev. 6 - 2
0.55/0.62
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1.7
2.2
C L
0.1
C L
July 2010
(c) Diodes Incorporated
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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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). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein 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 Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. 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.
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AH5792
Document number: DS314641 Rev. 6 - 2
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July 2010
(c) Diodes Incorporated

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