IC specification

MLX10801

Power LED driver for automotive applications

Power saving low side coil driver

Electronic fuse

3901010801

Page 2/41

Rev 021

14/July/05

Author: TFR

revised: RAH/SSZ

Table of content

Features............................................................................................................................... 1

Ordering Information............................................................................................................1

General Description .............................................................................................................1

Table of content ................................................................................................................... 2

Block diagram ...................................................................................................................... 4

1.

Typical application data............................................................................................. 5

1.1.

LED driver applications .................................................................................... 5

1.1.1.

Complete schematic LED driver diagram .................................................... 5

1.1.2.

Minimum schematic LED driver diagram..................................................... 5

1.1.3.

LED driver application notes ........................................................................ 6

1.1.3.1.

LED driver application notes for MLX10801 in MLPD8 5x5 .................. 7

1.2.

Coil driver applications ..................................................................................... 8

1.2.1.

Coil driver schematic diagram ..................................................................... 8

1.2.2.

Coil driver application notes......................................................................... 8

1.3.

Electronic fuse applications.............................................................................. 9

1.3.1.

Electronic fuse schematic diagram .............................................................. 9

1.3.2.

Electronic fuse application notes ................................................................. 9

2.

Application pins....................................................................................................... 10

3.

Absolute maximum ratings ..................................................................................... 11

4.

Electrical characteristics ......................................................................................... 13

5.

EE-Latch characteristics ......................................................................................... 16

6.

ESD/EMI recommendations for MLX10801............................................................ 16

7.

Automotive test pulses............................................................................................ 17

7.1.

Test pulse definition ....................................................................................... 18

8.

LED driving principle ............................................................................................... 21

8.1.

General........................................................................................................... 21

8.2.

The principle in detail ..................................................................................... 22

8.3.

Coil inductance, EMI and selected parameter set.......................................... 23

8.4.

Switching frequency considerations and constant light output....................... 25

9.

Coil driving principle................................................................................................ 26

9.1.

General........................................................................................................... 26

9.2.

The principle in detail ..................................................................................... 26

10.

Electronic fuse principle .......................................................................................... 26

11.

Sleep mode............................................................................................................. 27

12.

Temperature shutdown........................................................................................... 27

13.

Load dump protection ............................................................................................. 27

14.

The calibration ........................................................................................................ 27

14.1.

The internal control register ........................................................................... 27

14.2.

The Influence of the pseudo random generator to the monoflop time ........... 29

14.3.

The calibration interface................................................................................. 30

14.4.

The calibration procedure .............................................................................. 31

14.4.1.

Calibration procedure for LED driver applications ................................. 31

14.4.2.

Calibration procedure for coil driver applications:.................................. 32

14.4.3.

Calibration procedure for electronic fuse applications:.......................... 32

15.

Data content of delivered parts ............................................................................... 33

16.

Mechanical Data ..................................................................................................... 34

16.1.

Mechanical data of the MLX10801 in SOIC8 ................................................. 34

16.2.

Mechanical data of the MLX10801 in MLPD8 5x5 ......................................... 35

16.3.

Melexis standard soldering information.......................................................... 38

17.

History record.......................................................................................................... 39