US79KUA [MELEXIS]
CMOS Power Hall IC; CMOS电源霍尔IC
| 型号： | US79KUA |
| 厂家： | 
Melexis Microelectronic Systems |
| 描述： | CMOS Power Hall IC |
| 文件： | 总9页 (文件大小：146K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
US79 Series
CMOS Power Hall IC
Features and Benefits
• Built-in Reverse Voltage Protection
• Built-in RFI Filter
• Power Efficient CMOS and Power MOSFET Drivers allow 400mA without
overheating
• Built-in Zener Diodes Protect Outputs
• Eliminate all Fan Components
• Eliminate PC Board
• 5V and 12V Operation
• High Sensitivity for switching symmetry
• Locked Rotor Shutdown
Applications
•
•
Fan sizes up to 90mm
Current range up to 400mA
Ordering Information
Part No.
US79
Temperature Suffix
K (-40°C to 125°C)
Package Code
UA (TO-92 flat)
1. Functional Diagram
2. Description
The US79KUA is the most advanced Smart Fan
Control Hall IC. It is designed for 5V and 12V
cooling commutation. The chip contains many
features to allow survival in
a
harsh
environment. The IC was designed to eliminate
all discrete components such as capacitors,
resistors, transistors, diodes, PC board and
associated labor, replacing US$0.25 to US$0.35
in direct cost.
The K rating guarantees proper operation up to
an ambient temperature of 125°C. Hall IC
circuitry and power FET output provide a low
power dissipation cool chip.
Locked Rotor conditions are detected by the IC
when there is no motion for one second and will
shut off the motor drive for five seconds. Then,
the IC will turn on the drive current for one
second. This sequence continues indefinitely
until the locked rotor condition is fixed. This
feature prevents overheating.
1 2 3
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DataSheet
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US79 Series
CMOS Power Hall IC
TABLE OF CONTENTS
FEATURES AND BENEFITS ...................................................................................................................... 1
APPLICATIONS............................................................................................................................................ 1
ORDERING INFORMATION......................................................................................................................... 1
1. FUNCTIONAL DIAGRAM...................................................................................................................... 1
2. DESCRIPTION....................................................................................................................................... 1
3. GLOSSARY OF TERMS ....................................................................................................................... 3
4. ABSOLUTE MAXIMUM RATINGS ....................................................................................................... 3
5. US79 ELECTRICAL SPECIFICATIONS............................................................................................... 3
6. US79 MAGNETIC SPECIFICATIONS................................................................................................... 3
7. UNIQUE FEATURES............................................................................................................................. 4
8. PERFORMANCE GRAPHS................................................................................................................... 4
9. APPLICATION INFORMATION ............................................................................................................ 6
10. RELIABILITY INFORMATION............................................................................................................... 7
11. ESD PRECAUTIONS............................................................................................................................. 7
12. PACKAGE INFORMATION................................................................................................................... 8
13. DISCLAIMER......................................................................................................................................... 9
39010US79
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DataSheet
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US79 Series
CMOS Power Hall IC
3. Glossary of Terms
MilliTesla (mT), Gauss: Units of magnetic flux density; 1 milliTesla = 10 Gauss.
Two-Coil Fan: a fan with two coil windings, current alternates from 1 coil to the other depending on the
polarity of the magnetic field.
Two-wire Fan: A fan that has only two connections for the power supply plus and minus.
Locked rotor: The condition of a fan that has stopped spinning due to mechanical blockage .
4. Absolute Maximum Ratings
Supply Voltage, VDD
(-0.3 to 18)V
Output Current (Fault), IOUT
Operating Temperature Range, T
500mA
A
-40 to 125°C
-55 to 165°C
150°C
Storage Temperature Range, T
Maximun Junction Temp, T
S
J
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-
maximum-rated conditions for extended periods may affect device reliability.
5. US79 Electrical Specifications
DC operating parameters: T
= 25 oC, VDD = 12V unless otherwise specified
A
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Operating
Operating
Supply Voltage
Supply Current
V
DD
3.5
-
18
V
mA
mV
mV
oC/W
S
I
V
V
DD
2.0
4
I
OUT = 150mA
OUT = 350mA
Output Saturation voltage
Output Saturation voltage
Thermal resistance
DSS
DSS
300 600
I
650 1100
Operating
R
th
190
0.8
5
Locked-Rotor Period
Locked-Rotor period
ton
toff
S
6. US79 Magnetic Specifications
DC operating parameters: T
A
= 25
o
C, VDD = 12V unless otherwise specified.
Parameter
Symbol Test Conditions
Min
Typ
Max
Units
Operate Point
Release Point
Hysteresis
Operating
Operating
Operating
B
OP
RP
2.5
6.0
mT
mT
B
-6.0
2.0
-2.5
BHYS
5.0
-
mT
39010US79
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DataSheet
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US79 Series
CMOS Power Hall IC
7. Unique Features
Reverse voltage protection eliminates the need for a diode. Reverse current flows through the coils and
the chip. Power dissipation is (2 * Istall/Istart * 0.7V).
Table 1 presents max temperature for each current.
Reverse Voltage protection is provided by the motor windings.
The 35V Zener diodes clamp the output drivers for overstress protection.
8. Performance Graphs
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CMOS Power Hall IC
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DataSheet
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CMOS Power Hall IC
9. Applications Information
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CMOS Power Hall IC
10. Reliability Information
This Melexis device is classified and qualified regarding soldering technology, solderability and moisture
sensitivity level, as defined in this specification, according to following test methods:
•
•
•
IPC/JEDEC J-STD-020
Moisture/Reflow Sensitivity Classification For Nonhermetic Solid State Surface Mount Devices
(classification reflow profiles according to table 5-2)
EIA/JEDEC JESD22-A113
Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing
(reflow profiles according to table 2)
CECC00802
Standard Method For The Specification of Surface Mounting Components (SMDs) of Assessed
Quality
•
•
•
EIA/JEDEC JESD22-B106
Resistance to soldering temperature for through-hole mounted devices
EN60749-15
Resistance to soldering temperature for through-hole mounted devices
MIL 883 Method 2003 / EIA/JEDEC JESD22-B102
Solderability
For all soldering technologies deviating from above mentioned standard conditions (regarding peak
temperature, temperature gradient, temperature profile etc) additional classification and qualification tests
have to be agreed upon with Melexis.
The application of Wave Soldering for SMD’s is allowed only after consulting Melexis regarding assurance
of adhesive strength between device and board.
Based on Melexis commitment to environmental responsibility, European legislation (Directive on the
Restriction of the Use of Certain Hazardous substances, RoHS) and customer requests, Melexis has
installed a Roadmap to qualify their package families for lead free processes also.
Various lead free generic qualifications are running, current results on request.
For more information on manufacturability/solderability see quality page at our website:
http://www.melexis.com/html/pdf/MLXleadfree-statement.pdf
11. ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
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CMOS Power Hall IC
12. Package Information
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CMOS Power Hall IC
13. Disclaimer
Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing in
its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding the
information set forth herein or regarding the freedom of the described devices from patent infringement.
Melexis reserves the right to change specifications and prices at any time and without notice. Therefore,
prior to designing this product into a system, it is necessary to check with Melexis for current information.
This product is intended for use in normal commercial applications. Applications requiring extended
temperature range, unusual environmental requirements, or high reliability applications, such as military,
medical life-support or life-sustaining equipment are specifically not recommended without additional
processing by Melexis for each application.
The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall not
be liable to recipient or any third party for any damages, including but not limited to personal injury,
property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or
use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow
out of Melexis’ rendering of technical or other services.
© 2002 Melexis NV. All rights reserved.
For the latest version of this document, go to our website at:
www.melexis.com
Or for additional information contact Melexis Direct:
Europe and Japan:
Phone: +32 13 67 04 95
All other locations:
Phone: +1 603 223 2362
E-mail: sales_europe@melexis.com
E-mail: sales_usa@melexis.com
ISO/TS 16949 and ISO14001 Certified
39010US79
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DataSheet
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