L9945 datasheet(90/144 Pages) STMICROELECTRONICS

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[21] OC_READ_07: Selection of the OC threshold to read. Fixed threshold or actual threshold

0: Read fixed OC threshold

1: Read actual OC threshold

Reset: 0

Reset Condition: POR, NRES

[20:15] OC_CONFIG_07: Selection of over current detection threshold. 6 bit to code for the OC detection threshold

See Table 40

Reset: 000000

Reset Condition: POR, NRES

[14:13] OC_TEMP_COMP_07: Over current detection with temperature compensation (see note of Table 30. SPI MOSI list)

00: No OC compensation

01: ΔT < 60 °C

10: ΔT < 40 °C

11: ΔT < 25 °C

Reset: 00

Reset Condition: POR, NRES

[12] OC_BATT_COMP_07: Over current detection with battery compensation

0: Battery compensation de-activated

1: Battery compensation activated

Reset: 0

Reset Condition: POR, NRES

[11:9] TBLANK_OC_07: When DSM is selected, it specifies the OC blanking time to allow VDS settling. When Rshunt is selected, it

only determines the assertion of the 'No OC failure' diagnostic code (once expired).

000: 11.1 µs

001: 15.6 µs

010: 20 µs

011: 31.1 µs

100: 42.2 µs

101: 53.3 µs

110: 97.8 µs

111: 142.2 µs

Reset: 000

Reset Condition: POR, NRES

[8] PROT_CONFIG_07: Output re-engagement strategy. Specifies how channel reactivation must be performed following an OC

event

0: output re-engagement with control signal switching event

1: output re-engagement after diagnostic readout and control signal switching event

Reset: 0

Reset Condition: POR, NRES

[7] OC_DS_SHUNT_07: Configures the output measure OC with shunt or by DSM

0: OC with DSM

1: OC with Shunt

Reset: 0

Reset Condition: POR, NRES

L9945

Functional description

DS12275 - Rev 10

page 90/144

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