L9800 datasheet(52/55 Pages) STMICROELECTRONICS

52 / 55 page

7.3.1

Automatic PWM generator ................................................ 30

7.3.2

Automatic PWM LED generator ............................................ 31

7.4

Electrical parameters .......................................................... 32

Protection functions ..............................................................34

8.1

Overload protection............................................................ 34

8.2

Overtemperature protection ..................................................... 35

8.3

Overtemperature and overload in limp-home mode ................................. 35

8.4

Electrical parameters .......................................................... 35

Diagnosis ........................................................................36

9.1

Overload and overtemperature .................................................. 36

9.2

Off diagnosis ................................................................. 36

9.3

Electrical parameters .......................................................... 37

Limp-home mode .................................................................38

Serial peripheral interface (SPI) ...................................................40

11.1

SPI signal description .......................................................... 40

11.2

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

11.3

Timing diagrams .............................................................. 41

11.4

Electrical parameters .......................................................... 42

11.5

SPI protocol .................................................................. 43

11.6

SPI frame structure ............................................................ 43

11.6.1

MOSI frame structure .................................................... 43

11.6.2

MISO frame structure .................................................... 43

11.7

SPI registers ................................................................. 43

Package information..............................................................48

12.1

TFQFN24 4x4x0.9 wettable flanks package information ............................. 48

Revision history .......................................................................50

L9800

Contents

DS14041 - Rev 2

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