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L9963E Fiches technique(PDF) 97 Page - STMicroelectronics

No de pièce L9963E
Description  Automotive Multicell battery monitoring and balancing IC
PDF  184 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9963E Fiches technique(HTML) 97 Page - STMicroelectronics

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Operation
Skip condition
B8_7 – S7 Open / Short
VCELL7_EN = 0
S8 – B8_7 Open / Short
VCELL8_EN = 0
B10_9 – S9 Open / Short
VCELL9_EN = 0
S10 – B10_9 Open / Short
VCELL10_EN = 0
B12_11 – S11 Open / Short
VCELL11_EN = 0
S12 – B12_11 Open / Short
VCELL12_EN = 0
B14_13 – S13 Open / Short
VCELL13_EN = 0
S14 – B14_13 Open / Short
VCELL14_EN = 0
The step duration is fixed: it lasts 2*TBAL_OL.
The following failure can be flagged during balance terminal diagnostics step execution, thus causing
Configuration Override:
BALX_OPEN: if the voltage drop on the VDS of the balance power MOS becomes lower than VBAL_OPEN.
4.12.3.7
Hardware Self-Check (HWSC)
HWSC is the seventh step of the voltage conversion routine. It is optional:
To include it in On-Demand Conversions, the HWSC bit must be set along with the SOC in the same SPI
frame.
To specify its periodicity in Cyclic Conversions, the NCYCLE_HWSC field must be programmed (refer to
Section 4.12.4 Operations periodicity).
During this step, a BIST will be executed on the enabled analog conversion paths to verify the functionality of the
ADC chain. Analog comparators used for UV/OV detection and diagnostics will also be checked.
Table 66. Operations performed during HWSC step
Operation
Skip condition
CX to ADC
Never
GPIO3-9 to ADC
Never
VBAT UV/OV comparator
Never
VREG UV/OV comparator
Never
VCOM UV/OV comparator
Never
VTREF UV/OVcomparator
Never
Bx_x-1 to ADC
Never
Sx to ADC
Never
Bx_x-1/Sx-1 Open/Short comparator (even cells)
Never
Sx/Bx_x-1 Open/Short comparator (odd cells)
Never
The step duration is fixed: it lasts 3*TCYCLEADC_000 (refer to Table 38).
The following failures can be flagged during HWSC step execution, thus causing Configuration Override:
MUX_BIST_FAIL: if a failure is found while converting the Cx paths connected to the analog MUX
OPEN_BIST_FAIL: if a failure is found while converting the Sx/Bx_x-1 paths connected to the analog MUX
GPIO_BIST_FAIL: if a failure is found while converting the GPIOx paths connected to the analog MUX
VBAT_COMP_BIST_FAIL: if the BIST on the VBAT UV/OV comparator fails
VREG_COMP_BIST_FAIL: if the BIST on the VREG UV/OV comparator fails
VCOM_COMP_BIST_FAIL: if the BIST on the VCOM UV/OV comparator fails
VTREF_COMP_BIST_FAIL: if the BIST on the VTREF UV/OV comparator fails
L9963E
Voltage conversion routine
DS13636 - Rev 12
page 97/184



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