L9026 datasheet(56/60 Pages) STMICROELECTRONICS

56 / 60 page

7.1

Operating modes.............................................................. 20

7.1.1

Switching resistive modes ................................................. 20

7.1.2

Inductive output clamp ................................................... 21

7.1.3

Maximum load inductance................................................. 21

7.2

Inverse current behavior........................................................ 22

7.3

Bulb inrush mode ............................................................. 22

7.4

PWM generators .............................................................. 23

7.4.1

PWM GEN ............................................................ 23

7.4.2

PWM LED ............................................................. 24

7.5

Power stages electrical specifications ............................................ 25

Protection functions ..............................................................28

8.1

Overload protection............................................................ 28

8.2

Over temperature protection .................................................... 29

8.3

Over temperature and over load in Limp Home mode ............................... 29

8.4

Reverse polarity protection ..................................................... 29

8.5

Electrical characteristics........................................................ 29

Diagnosis ........................................................................31

9.1

Over load and Over temperature................................................. 31

9.2

OFF diagnosis ................................................................ 31

9.3

Open load at ON .............................................................. 32

9.3.1

Open load at ON (diagnosis mechanism) ..................................... 32

9.3.2

Open load at ON bit ..................................................... 33

9.4

Electrical parameters .......................................................... 34

Limp Home mode .................................................................35

SPI ...............................................................................37

11.1

SPI protocol .................................................................. 37

11.2

Daisy chain capability .......................................................... 38

11.3

SPI electrical specifications ..................................................... 38

11.4

SPI timing diagram ............................................................ 40

11.5

SPI frame structure ............................................................ 40

11.5.1

MOSI frame structure .................................................... 40

L9026

Contents

DS13397 - Rev 5

page 56/60

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