L9918 datasheet(104/109 Pages) STMICROELECTRONICS

104 / 109 page

3.2.3

Adaptive PH threshold calculation........................................... 22

3.2.4

Hot start .............................................................. 23

High side driver output - EXC pin .................................................24

4.1

EXC electrical characteristic .................................................... 24

4.2

EXC characteristics............................................................ 27

4.2.1

Minimum and maximum excitation duty cycle:.................................. 27

4.2.2

Load response control.................................................... 27

4.2.3

Pre-excitation specific mode selection ....................................... 27

4.2.4

Excitation OFF command ................................................. 29

4.2.5

Excitation behavior during phase regulation ................................... 29

4.2.6

Excitation current measurement ............................................ 29

4.2.7

Current limitation........................................................ 30

Communication terminal - LIN pin.................................................31

5.1

LIN Physical layer ............................................................. 31

5.2

Message frames .............................................................. 33

5.3

LIN Frames .................................................................. 33

5.3.1

Message frame for configuration version-A .................................... 35

5.3.2

Message frame for configuration version-B .................................... 37

5.3.3

Message frames for configuration version-C ................................... 38

5.3.4

Message frame for configuration version-D.................................... 39

5.3.5

Message frame for configuration version-E .................................... 40

5.3.6

Message frame for configuration version-F .................................... 41

5.3.7

Measurements filter...................................................... 43

5.4

LIN Diagnostic frames ......................................................... 43

5.4.1

Sleep frame ........................................................... 44

5.4.2

Read by identifier ...................................................... 44

5.4.3

Assign frame ID ....................................................... 44

5.5

LIN Fault detection ............................................................ 45

5.5.1

Mechanical fault (F_M) .................................................. 45

5.5.2

Electrical fault (F_E) ..................................................... 45

5.5.3

Thermal fault (F_T) ..................................................... 46

5.5.4

LIN Timeout flag (F_L0) ................................................. 46

L9918

Contents

DS13000 - Rev 2

page 104/109

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