ISL8274M datasheet(49/81 Pages) RENESAS

49 / 81 page

FN8931 Rev.1.00

Page 49 of 81

Jan 4, 2018

ISL8274M

7. PMBus Commands Description

IOUT_OC_WARN_LIMIT (4Ah)

Definition: Sets the IOUT average overcurrent warning threshold.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: IOUT_AVG_OC_FAULT_LIMIT x 0.9

Units: A

Range: -100A to 100A

IOUT_UC_FAULT_LIMIT (4Bh)

Definition: Sets the IOUT valley undercurrent fault threshold. This limit is applied to current measurement samples

taken after the Current Sense Blanking Time has expired. A fault occurs after this limit is exceeded. The recommended

valley UCP limit is determined by (EQ. 3):

A hard bound of -50A is applied to the command value. This feature shares the UC fault bit operation (in

STATUS_IOUT) and UC fault response with IOUT_AVG_UC_FAULT_LIMIT.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: E4E0 (-50A)

Units: A

Range: -100A to 100A

OT_FAULT_LIMIT (4Fh)

Definition: Sets the temperature at which the device should indicate an over-temperature fault. Note that the

temperature must drop below OT_WARN_LIMIT to clear this fault.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: EB98 (+115°C)

Units: °C

Range: 0°C to +175°C

IOUT_UC_FAULT_LIMIT

IOUT_AVG_UC_FAULT_LIMIT 0.5 IRIPPLEPP

–



–

 130%



(EQ. 3)

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