L9963E datasheet(46/184 Pages) STMICROELECTRONICS

46 / 184 page

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VCUR_SENSE

Input voltage for ADC

conversion

Application info. Absolute voltage on

ISENSEP/M pins. Same as operating

range

-300

+300

VDIFF_CUR_SENSE

Differential input voltage.

ISENSEP- ISENSEM

range

Design info

-150

+150

ICELLRES

Current Measurement

Resolution

±1750 A full scale input assuming 18-

bit signed data output and an Rshunt =

0.1 mΩ

Not tested, application info

13.33

VISENSE_RES

Voltage Measurement

Resolution

±175 mV full scale input assuming 18-

bit signed data output

Design info

1.33

μV

ICELLERR

Current Measurement

Error VDIFF_SENSE

= V(ISENSE+) -

V(ISENSE-)

-150 mV ≤ VDIFF_CUR_SENSE < -60

mV,

-40 °C < TJ < 125 °C

-0.5

0.5

ICELLERR2

-60 mV ≤ VDIFF_CUR_SENSE ≤ 60 mV

-40 °C < TJ < 125 °C

-0.3

0.3

ICELLERR3

60 mV < VDIFF_CUR_SENSE ≤ 15 0 mV,

-40 °C < TJ < 125 °C

-0.5

0.5

ICURR_SENSE_OC_SLEEP

ISENSE Over-current

Fault Threshold in Cyclic

Wakeup

Tested in SCAN (76.8A with Rshunt =

0.1 mΩ)

10.55488 mV

ICURR_SENSE_OC_NORM

ISENSE Over-current

Fault Threshold in Normal

175

ICELL_OC_SLP_RES

ISENSE Over-current

Fault Threshold

Resolution in Cyclic

Wakeup

Application info (+/-3.4048A with

Rshunt = 0.1 mΩ)

340.48

μV

ICELL_OC_NORM_RES

ISENSE Over-current

Fault Threshold

Resolution in Normal

Application info (+/-13.3 mA with

Rshunt = 0.1 mΩ)

1.33

μV

VISENSE_OPEN_thr

ISENSE pins open

threshold voltage

1.5

1.7

1.9

TCURR_SENSE_OPEN_filter Open digital filter time

Tested in SCAN

μs

4.7

Cell balancing

The Sx and Bx_x-1 pins are used to balance the charge of the cells by discharging the ones with a higher SOC

(State Of Charge). Balancing can be performed either with external or internal MOSFETs.

Cell balance drivers are powered by VBAT stack voltage. Hence, balancing is theoretically possible even at low

cell voltages, with an exception for cell 14. In case VCELL14 < VCELL14_BAL_MIN, the correspondent balancing

circuitry will not operate properly and false overcurrent detection may occur.

4.7.1

Passive cell balancing with internal MOSFETs

The internal balancing requires only on-board resistors, and the MOSFETs which are embedded in the chip.

L9963E

Cell balancing

DS13636 - Rev 12

page 46/184

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