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US90A の電気的特性と機能

US90AのメーカーはMelexis Microelectronic Systemsです、この部品の機能は「(US90A / US91A) 24V Hall IC Fan Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 US90A
部品説明 (US90A / US91A) 24V Hall IC Fan Driver
メーカ Melexis Microelectronic Systems
ロゴ Melexis Microelectronic Systems ロゴ 




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US90A Datasheet, US90A PDF,ピン配置, 機能
US90A / US91A
24V Hall IC Fan Driver
Features and Benefits
Low cost
High sensitivity Hall Sensor
Locked rotor protection and auto-restart
Power-efficient CMOS and power MOSFETs
Built-in output protection clamping diode
Integrated tachometer (US90A) or alarm (US91A) signal output
2-coil fan driver with FG/RD output in 4-pin VK / VA
and 8-pin narrow SOIC packages (all RoHS Compliant)
Application Examples
12V/24V fans
Peak current up to 500mA
Ordering Information
www.DataSheet4U.com
Part No.
US90A
US90A
US90A
Temperature Code
E (-40°C to 85°C)
E (-40°C to 85°C)
E (-40°C to 85°C)
US91A
US91A
US91A
E (-40°C to 85°C)
E (-40°C to 85°C)
E (-40°C to 85°C)
Package Code
VK (4-pin TO-92)
DC (8-pin narrow SOIC)
VA (4-pin TO-92 flat)
VK (4-pin TO-92)
DC (8-pin narrow SOIC)
VA (4-pin TO-92 flat)
1 Functional Diagram
2 General Description
The US90A/91A is a one-chip solution for driving
two-coil brushless DC cooling fans.
Based on the advanced Melexis CMOS process,
the IC contains a Hall-effect sensor, dynamic
offset correction and low side output drivers.
Frequency Generator or Rotation Detection is
available. The open-drain output makes the
connectivity with any external interface such as
hardware monitoring or Super I/O IC easier.
These features are combined with the Melexis
patented no-VDD design to fit the IC in small 4-pin
VK and VA package.
The device is also delivered in DC package for
automatic assembly.
390109026302
Rev 002
Page 1 of 12
Data Sheet
Apr/07

1 Page





US90A pdf, ピン配列
US90A / US91A
24V Hall IC Fan Driver
3 Glossary of Terms
Two-coil fan
MilliTesla (mT), Gauss
VDD
IDD
Peak output current
Continuous output current
Locked rotor
www.DataFShGeet4U.com
RD
LFPM
A fan with two-coil windings where current alternates from 1 coil to the other
depending on the direction of the magnetic field.
Units of magnetic flux density :
1mT = 10 Gauss
Voltage on the coils common node.
Current supplying the chip which flows through the coil connected to the
switched off output driver.
The current flowing in the coil at start-up, only limited by the coil resistance
RCOIL and the output driver resistance RDSON.
The current flowing in the coil when the fan is spinning normally.
The state when the fan stopped spinning due to mechanical blockage.
Frequency generator or tachometer output
Rotation detection or alarm output
Linear Feet Per Minute – Unit of airflow velocity
4 Absolute Maximum Ratings
Parameter
Symbol
Fan Supply Voltage
VDD
Peak Output Current
IOUTp
Continuous Output Current
IOUTc
FG / RD Output Current
IFG (RD)
Operating Temperature Range
TA
Junction Temperature
TJ
Storage Temperature Range
TS
Magnetic Flux Density
B
Table 1: Absolute maximum ratings
Value
30
500
250
20
-40 to 85
125
-55 to 150
Unlimited
Units
V
mA
mA
mA
°C
°C
°C
mT
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-
rated conditions for extended periods may affect device reliability.
5 Pin Definitions and Descriptions
Pin Name Pin number (VK) Pin number (DC) Pin number (VA)
FG (RD)
1
1
1
OUT1
2
2
2
OUT2
3
4
4
GND 4 3 3
--
5, 6, 7, 8
-
Table 2: Pin definitions and descriptions US90A (US91A)
Function
FG (RD) open drain output signal
Open Drain Coil Driver 1
Open Drain Coil Driver 2
Ground pin
Not Connected
390109026302
Rev 002
Page 3 of 12
Data Sheet
Apr/07


3Pages


US90A 電子部品, 半導体
US90A / US91A
24V Hall IC Fan Driver
11 Performance Graphs
11.1 RDSON vs TJ
5
VDD = 5V
VDD = 24V
4
3
11.2 RDSON vs VDD
5
4
3
Tj = -40°C
Tj = 25°C
Tj = 125°C
22
1
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0
-40 -20 0 20 40 60 80
Tj (°C)
11.3 Magnetic parameters vs TJ
6
5 Bop, VDD=5V
4 Brp, VDD=5V
3
2
1
0
-1
-2
-3
-4
-5
-6
-40 -20 0 20 40 60 80
Tj (°C)
1
100 120
Bop, VDD=24V
Brp, VDD=24V
100 120
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
VDD (Volts)
11.4 Magnetic parameters vs VDD
6
5
Bop, Tj=25°C
Bop, Tj=125°C
Brp, Tj=25°C
Brp, Tj=125°C
4
Bop, Tj=-40°C
Brp, Tj=-40°C
3
2
1
0
-1
-2
-3
-4
-5
-6
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
VDD (Volts)
11.5 IDD vs TJ
4
3.5
3
2.5
2
1.5
1
0.5
0
-40
-20
0
20
40
Tj (°C)
60
VDD = 5V
VDD = 24V
11.6 IDD vs VDD
4
3.5
3
2.5
2
Tj = -40°C
Tj = 25°C
Tj = 125°C
1.5
1
0.5
80 100 120
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
VDD (Volts)
390109026302
Rev 002
Page 6 of 12
Data Sheet
Apr/07

6 Page



ページ 合計 : 12 ページ
 
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[ US90A データシート.PDF ]


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共有リンク

Link :


部品番号部品説明メーカ
US90A

(US90A / US91A) 24V Hall IC Fan Driver

Melexis Microelectronic Systems
Melexis Microelectronic Systems


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