L99MH98 datasheet(138/147 Pages) STMICROELECTRONICS

138 / 147 page

Contents

Block diagram and pin description .................................................3

1.1

Block diagram ................................................................. 3

1.2

Pin description ................................................................. 4

Electrical specifications ...........................................................6

2.1

Absolute maximum ratings....................................................... 6

2.2

ESD protection ................................................................ 7

2.3

Thermal data .................................................................. 7

2.3.1

VFQFPN-48 Thermal data ................................................. 7

2.4

Electrical characteristics......................................................... 8

2.4.1

Supply, supply monitoring and current consumption .............................. 8

2.4.2

Logic inputs PWMx, EN ................................................... 9

2.4.3

Diagnostic not output (DIAGN) .............................................. 9

2.4.4

Charge pump .......................................................... 10

2.4.5

Gate driver ............................................................ 10

2.4.6

Watchdog ............................................................. 14

2.4.7

Open-load monitoring external ............................................. 15

2.4.8

Drain-source monitoring threshold .......................................... 15

2.4.9

Drain source monitoring blanking time ....................................... 16

2.4.10

Drain source monitoring filter time........................................... 16

2.4.11

Cross current protection time .............................................. 17

2.4.12

External temperature diode ................................................ 17

2.4.13

SPI .................................................................. 17

2.4.14

Indirect current sense output............................................... 19

Functional description ............................................................20

3.1

Power supply ................................................................. 20

3.1.1

VDH overvoltage (VDHOV) ................................................ 20

3.1.2

VDH undervoltage (VDHUV) ............................................... 20

3.1.3

VDD overvoltage (VDDOV) ................................................ 20

3.2

Operation modes.............................................................. 21

3.2.1

Reset ................................................................ 21

3.2.2

Power-up state and charge pump enabling .................................... 21

3.2.3

Active mode ........................................................... 21

3.2.4

Multi fail-safe mode ...................................................... 22

3.2.5

Operational matrix....................................................... 24

3.2.6

Power-up sequence ..................................................... 25

3.3

Thermal warning and thermal shutdown (TW/TSD) ................................. 27

L99MH98

Contents

DS14611 - Rev 3

page 138/147

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