L9908 datasheet(146/153 Pages) STMICROELECTRONICS

146 / 153 page

5.6.4

Gate driver supply enable logic ............................................. 41

5.7

Power-Up sequences .......................................................... 42

5.8

Digital I/O .................................................................... 43

5.8.1

VIO power supply ....................................................... 43

5.8.2

Digital Input (DI) ........................................................ 43

5.8.3

Digital Output (DO) ...................................................... 44

5.9

Internal clock ................................................................. 45

5.9.1

Spread Spectrum Modulation (SSM)......................................... 45

5.9.2

Internal Clock Monitor (ICM) ............................................... 45

5.10

Motor Battery Monitor (MBM) ................................................... 46

5.11

Gate driver supply ............................................................. 48

5.11.1

Pre-regulation stage ..................................................... 49

5.11.2

VBP monitor ........................................................... 51

5.11.3

VPRE monitor .......................................................... 53

5.11.4

Supply distribution stage .................................................. 55

5.11.5

VCP monitor ........................................................... 58

5.12

Half bridges gate drivers ....................................................... 60

5.12.1

Ext. FET VGS monitor.................................................... 66

5.12.2

Dead Time Protection (DTP) ............................................... 67

5.12.3

Shoot-Through Protection (STP) ............................................ 68

5.13

Current monitors .............................................................. 70

5.13.1

A/D conversion ......................................................... 72

5.13.2

Digital signal processing .................................................. 78

5.13.3

D/A conversion ......................................................... 86

5.13.4

Current monitor A/D - D/A chain ............................................ 88

5.14

Off State Diagnosis (OFD) ...................................................... 90

5.15

On State Diagnosis (OND)...................................................... 94

5.16

Phase Voltage Feedback (PVF) ................................................. 98

5.16.1

CSO3 - PVF multiplexing ................................................ 100

5.17

Actuation Timers (ACT) .......................................................100

5.18

Ground Loss Monitor (GLM) ...................................................102

5.19

Temperature Monitor (OTM) ...................................................102

L9908

Contents

DS13546 - Rev 3

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