US891EVK datasheet(2/12 Pages) MELEXIS

2 / 12 page

US890 / US891

Two-Coil Fan Driver – High Output Current

3901000890

Page 2 of 12

Data Sheet

Rev 002

Sep/07

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

8 Driver Output vs Magnetic Pole..................................................................................... 4

9 Detailed General Description ......................................................................................... 5

10 Unique Features............................................................................................................ 5

11 Performance Graphs .................................................................................................... 7

11.1 RDSON vs TA ............................................................................................................... 7

11.2 RDSON vs VDD ............................................................................................................. 7

11.3 Magnetic parameters vs TA ....................................................................................... 7

11.4 Magnetic parameters vs VDD ..................................................................................... 7

11.5 IDD vs TA .................................................................................................................... 7

11.6 IDD vs VDD .................................................................................................................. 7

12 Test conditions ............................................................................................................. 8

12.1 VDD – operating ......................................................................................................... 8

12.2 RDSON ........................................................................................................................ 8

12.3 IDD ............................................................................................................................. 8

12.4 FG/RD Output Low Voltage ...................................................................................... 8

13 Application Information................................................................................................ 9

13.1 Typical application circuit .......................................................................................... 9

13.2 Recommended circuit for ground disconnection protection....................................... 9

14 Application Comments ................................................................................................. 9

15 Standard information regarding manufacturability of Melexis products with

different soldering processes......................................................................................... 10

16 ESD Precautions ......................................................................................................... 10

17 VK Package Information (4-pin TO-92)...................................................................... 11

18 Disclaimer.................................................................................................................... 12

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