ISL8270MEVAL1Z datasheet(32/56 Pages) RENESAS

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ISL8270M

FN8635 Rev.4.00

Page 32 of 56

Aug 17, 2017

OT_FAULT_RESPONSE (50h)

Definition: Instructs the device on what action to take in response to an over-temperature fault.

Data Length in Bytes: 1

Data Format: BIT

Type: R/W

Fault Value: 80h (Disable and no retry)

Units: N/A

OT_WARN_LIMIT (51h)

Definition: Sets the temperature at which the device should indicate an over-temperature warning alarm. In response to the

OT_WARN_LIMIT being exceeded, the device: Sets the TEMPERATURE bit in STATUS_WORD, sets the OT_WARNING bit in

STATUS_TEMPERATURE, and notifies the host.

Data Length in Bytes: 2

Data Format: Linear-11.

Type: R/W

Default Value: EB70h (+110°C)

Units: Celsius

Range: 0°C to +175°C

UT_WARN_LIMIT (52h)

Definition: Sets the temperature at which the device should indicate an under-temperature Warning alarm. In response to the

UT_WARN_LIMIT being exceeded, the device: Sets the TEMPERATURE bit in STATUS_WORD, sets the UT_WARNING bit in

STATUS_TEMPERATURE, and notifies the host.

Data Length in Bytes: 2

Data Format: L11.

Type: R/W

Default Value: DC40h (-30°C)

Units: Celsius

Range: -55°C to +25°C

UT_FAULT_LIMIT (53h)

Definition: Sets the temperature, in degrees Celsius, at which the device should indicate an under-temperature fault. Note that the

temperature must rise above UT_WARN_LIMIT to clear this fault.

Data Length in Bytes: 2

Data Format: L11

Type: R/W

Default Value: E530h (-45°C)

Units: Celsius

Range: -55°C to +25°C

BIT

FIELD NAME

VALUE

DESCRIPTION

7:6

Reserved

5:3

Retry Setting

000

No retry. The output remains disabled until the fault is cleared.

001-110

Not used.

111

Attempts to restart continuously, without checking if the fault is still present, until it is

commanded OFF (by the CONTROL pin or OPERATION command), bias power is removed,

or another fault condition causes the unit to shut down.

2:0

Retry Delay

000-111

Retry delay time = (Value + 1) * 35ms. Sets the time between retries in 35ms

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