LT3045 datasheet(49/62 Pages) AD

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Data Sheet

LT3074

analog.com

Rev 0.

49 of 62



Sets the IOUT bit in the STATUS_WORD register.



Sets the IOUT_OC_FAULT bit in the STATUS_IOUT register.



Notifies the host by asserting the ALERT pin.

This read-only command has one data byte.

OT_WARN_LIMIT

The OT_WARN_LIMIT command sets the value of the average die temperature measured by the on-chip temperature

sensor, in degrees Celsius, which causes an overtemperature warning. The die temperature measured and converted

by the ADC (and reported using the READ_TEMPERATURE_1 command) is used to compare the average die

temperature to the limit value. As a result, there can be up to 50ms delay from the time the average die temperature

hits the limit to the time the fault is reported. Transitionary faults that last for a time period smaller than the ADC

conversion time are filtered out and not reported.

In response to the OT_WARN_LIMIT being exceeded, the device:

•

Sets the TEMPERATURE bit in STATUS_BYTE register.

•

Sets the TEMPERATURE bit in the STATUS_WORD register.

•

Sets the OVTWARNING bit in the STATUS_TEMPERATURE register.

•

Notifies the host by asserting the ALERT pin.

This command has two data bytes and is formatted in the Linear_5s_1s format.

VIN_OV_WARN_LIMIT

The VIN_OV_WARN_LIMIT command sets the value of the input voltage measured at the IN pin, in Volts, which causes

an input voltage high warning. The input voltage measured and converted by the ADC (and reported using the

READ_VIN command) is used to compare the actual input voltage to the limit value. As a result, there can be up to a

20ms delay from the time the input voltage hits the limit to the time the fault is reported. Transitionary faults that

last for a time period smaller than the ADC conversion time are filtered out and not reported.

In response to the VIN_OV_WARN_LIMIT being exceeded, the device:



Sets the NONE_OF_THE_ABOVE bit in STATUS_BYTE register.



Sets the INPUT bit in the STATUS_WORD register.



Sets the VIN_OV_WARNING bit in the STATUS_INPUT register.



Notifies the host by asserting the ALERT pin.

This command has two data bytes and is formatted in the Linear_5s_11s format.

VIN_UV_WARN_LIMIT

The VIN_UV_WARN_LIMIT command sets the value of the input voltage measured at the IN pin, in Volts, which causes

an input voltage low warning. The input voltage measured and converted by the ADC (and reported using the

READ_VIN command) is used to compare the actual input voltage to the limit value. As a result, there can be up to a

20ms delay from the time the input voltage hits the limit to the time the fault is reported. Transitionary faults that

last for a time period smaller than the ADC conversion time are filtered out and not reported.

In response to the VIN_UV_WARN_LIMIT being exceeded, the device:

LT3045 Datasheet(PDF) 49 Page - Analog Devices

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