L9963E datasheet(176/184 Pages) STMICROELECTRONICS

176 / 184 page

4.4.1

Electrical parameters .................................................... 41

4.5

VBAT voltage measurement .................................................... 43

4.5.1

Total battery voltage measurement .......................................... 43

4.5.2

Electrical parameters .................................................... 43

4.6

Cell current measurement ...................................................... 45

4.6.1

Cell current ADC ........................................................ 45

4.6.2

Electrical parameters .................................................... 45

4.7

Cell balancing ................................................................ 46

4.7.1

Passive cell balancing with internal MOSFETs ................................. 46

4.7.2

Passive cell balancing with external MOSFETs ................................. 47

4.7.3

Balancing modes ....................................................... 48

4.7.4

Balancing state transition ................................................. 52

4.7.5

Electrical parameters .................................................... 52

4.8

Device regulators ............................................................. 53

4.8.1

Linear regulators ........................................................ 54

4.8.2

Bootstrap ............................................................. 55

4.8.3

Electrical parameters .................................................... 56

4.9

General purpose I/O: GPIOs .................................................... 58

4.9.1

GPIO3-9: absolute analog inputs ........................................... 58

4.9.2

GPIO1-9: standard digital I/O .............................................. 59

4.9.3

GPIO8-9: SPI commands ................................................. 59

4.9.4

GPIO7: wake up feature .................................................. 59

4.9.5

GPIO1-2: FAULT feature .................................................. 59

4.9.6

Electrial parameters ..................................................... 60

4.10

Internal Non Volatile Memory (NVM) ............................................. 63

4.10.1

NVM read ............................................................. 64

4.10.2

NVM erase ............................................................ 64

4.10.3

NVM write ............................................................. 64

4.10.4

Electrical parameters .................................................... 65

4.11

Safety and diagnostic features .................................................. 65

4.11.1

Cell UV/OV diagnostic.................................................... 65

4.11.2

Total battery VBAT diagnostic .............................................. 65

L9963E

Contents

DS13636 - Rev 12

page 176/184

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