US91A 반도체 회로 부품 판매점
(US90A / US91A) 24V Hall IC Fan Driver
|
|
 Melexis Microelectronic Systems |
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
US90A / US91A
24V Hall IC Fan Driver
Table of Contents
1 Functional Diagram ........................................................................................................ 1
2 General Description........................................................................................................ 1
3 Glossary of Terms .......................................................................................................... 3
4 Absolute Maximum Ratings ........................................................................................... 3
5 Pin Definitions and Descriptions................................................................................... 3
6 General Electrical Specifications .................................................................................. 4
7 Magnetic Specifications ................................................................................................. 4
www.DataSheet4U.com
8 Driver Output vs Magnetic Pole..................................................................................... 4
9 Detailed General Description ......................................................................................... 5
10 Unique Features............................................................................................................ 5
11 Performance Graphs .................................................................................................... 6
11.1 RDSON vs TJ...................................................................................................................................................................... 6
11.2 RDSON vs VDD .................................................................................................................................................................. 6
11.3 Magnetic parameters vs TJ .................................................................................................................................. 6
11.4 Magnetic parameters vs VDD............................................................................................................................... 6
11.5 IDD vs TJ ............................................................................................................................................................................. 6
11.6 IDD vs VDD ......................................................................................................................................................................... 6
11.7 VOL vs TJ ........................................................................................................................................................................... 7
11.8 Power Dissipation vs. TA ....................................................................................................................................... 7
12 Application Information................................................................................................ 7
12.1 Typical application with pull-up resistor..................................................................... 7
12.2 Configuration for reverse voltage / ground hot-switch protection and enhanced ESD
module protection ............................................................................................................. 7
13 Application Comments ................................................................................................. 7
14 Standard information regarding manufacturability of Melexis products with
different soldering processes........................................................................................... 8
15 ESD Precautions ........................................................................................................... 8
16 Package Information..................................................................................................... 9
16.1 VK Package Information (4-pin TO92)......................................................................................................... 9
16.2 DC Package Information (8-pin narrow SOIC)..................................................................................... 10
16.3 VA Package Information (4-pin TO92 flat) .............................................................................................. 11
17 Disclaimer.................................................................................................................... 12
390109026302
Rev 002
Page 2 of 12
Data Sheet
Apr/07
|
PDF 파일 내의 페이지 : 총 12 페이지
제조업체: Melexis Microelectronic Systems
( melexis )
US91A driver
데이터시트 다운로드 :
[ US91A.PDF ]
[ US91A 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
[ 홈페이지 ]
IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈
( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )
전력반도체 문의 : 010-3582-2743
관련 데이터시트
US9111
Silicon Pressure Sensor - pravance
US91A
(US90A / US91A) 24V Hall IC Fan Driver - Melexis Microelectronic Systems