L9026 datasheet(57/60 Pages) STMICROELECTRONICS

57 / 60 page

7.3

Bulb inrush mode ............................................................. 23

7.4

PWM generators .............................................................. 24

7.4.1

PWM GEN ............................................................ 24

7.4.2

PWM LED ............................................................. 25

7.5

Power stages electrical specifications ............................................ 26

Protection functions ..............................................................29

8.1

Overload protection............................................................ 29

8.2

Overtemperature protection ..................................................... 31

8.3

Overtemperature and overload in Limp Home mode ................................ 31

8.4

Reverse polarity protection ..................................................... 31

8.5

Electrical characteristics........................................................ 31

Diagnosis ........................................................................33

9.1

Overload and overtemperature .................................................. 33

9.2

OFF diagnosis ................................................................ 33

9.3

Open load at ON .............................................................. 34

9.3.1

Open load at ON (diagnosis mechanism) ..................................... 34

9.3.2

Open load at ON bit ..................................................... 35

9.4

Electrical parameters .......................................................... 36

Limp Home mode .................................................................37

SPI ...............................................................................39

11.1

SPI protocol .................................................................. 39

11.2

Daisy chain capability .......................................................... 40

11.3

SPI electrical specifications ..................................................... 40

11.4

SPI timing diagram ............................................................ 41

11.5

SPI frame structure ............................................................ 42

11.5.1

MOSI frame structure .................................................... 42

11.5.2

MISO frame structure .................................................... 42

11.6

SPI register .................................................................. 42

11.6.1

Package information..............................................................49

12.1

VFQFPN32 (5x5x1 mm exp. pad down 3.5x3.5) package information.................. 49

12.2

HTSSOP24 (7.8x6.4x1 mm exp. pad down 5.0x3.2) package information .............. 52

Revision history .......................................................................55

L9026

Contents

DS13397 - Rev 9

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