LDLL16ENTR datasheet(96/102 Pages) STMICROELECTRONICS

96 / 102 page

Contents

Introduction .......................................................................3

1.1

Device information ............................................................. 5

Device supply concept.............................................................7

Linear current sinkers .............................................................8

3.1

General description............................................................. 8

3.2

Channel current setting ......................................................... 8

3.3

Channel driver drop-out voltage .................................................. 9

3.4

Channel output gradual delay .................................................... 9

Functional description ............................................................11

4.1

Operating modes.............................................................. 11

4.1.1

Standby mode.......................................................... 12

4.1.2

Initialization ............................................................ 12

4.1.3

Reset mode ........................................................... 12

4.1.4

Fail-safe/Stand-alone mode ............................................... 13

4.1.5

Normal/Bus mode ....................................................... 13

4.2

Programmable functions ....................................................... 14

4.2.1

Direct drive and functional configuration ...................................... 14

4.2.2

PWM operation ......................................................... 15

4.3

Protections and diagnostic ...................................................... 20

4.3.1

Diagnostic availability and validation - strategy ................................. 20

4.3.2

Fault reaction mode and fault bus capability ................................... 21

4.3.3

Thermal warning ........................................................ 22

4.3.4

Thermal shutdown ...................................................... 22

4.3.5

LED current derating ..................................................... 22

4.3.6

VS undervoltage lockout .................................................. 22

4.3.7

Channel output – LED short circuit detection .................................. 22

4.3.8

Channel output – short circuit to VPREG ...................................... 25

4.3.9

Channel output – open-load detection........................................ 27

Communication interface .........................................................29

5.1

External CAN transceiver ....................................................... 29

5.2

CAN FD light compatible network protocol ........................................ 30

5.3

Protocol overview ............................................................. 30

5.3.1

Basic overview ......................................................... 30

5.3.2

Commander ........................................................... 31

5.3.3

Responder ............................................................ 32

LDLL16EN

Contents

DS14111 - Rev 5

page 96/102

LDLL16ENTR Datasheet(PDF) 96 Page - STMicroelectronics

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