EVAL-ADM1275EBZ【PDF 40/48 页】BOARD EVALUATION FOR ADM1275

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ADM1275

STATUS_INPUT

Code: 0x7C, read byte. Value after reset: 0x00.

Table 24. Bit Descriptions for STATUS_INPUT Command

Data Sheet

Bits

7

Bit Name

VIN_OV_FAULT

Behavior

Latched

Settings

0

Description

No overvoltage detected on the OV pin.

1

An overvoltage was detected on the OV pin.

6

VIN_OV_WARN

Latched

0

No overvoltage condition on the input supply detected by the power

monitor.

1

An overvoltage condition on the input supply was detected by the power

monitor.

5

VIN_UV_WARN

Latched

0

No undervoltage condition on the input supply detected by the power

monitor.

1

An undervoltage condition on the input supply was detected by the

power monitor.

4

VIN_UV_FAULT

Latched

0

No undervoltage detected on the UV pin.

1

An undervoltage was detected on the UV pin.

[3:0]

Reserved

0000

Always reads as 0000.

STATUS_MFR_SPECIFIC

Code: 0x80, read byte. Value after reset: 0x00.

Table 25. Bit Descriptions for STATUS_MFR_SPECIFIC Command

Bits

7

Bit Name

FET_HEALTH_BAD

Behavior

Latched

Settings

0

Description

FET behavior appears to be as expected.

1

FET behavior suggests that the FET may be shorted.

6

UV_CMP_OUT

Live

0

Input voltage to UV pin is above threshold.

1

Input voltage to UV pin is below threshold.

5

OV_CMP_OUT

Live

0

Input voltage to OV pin is below threshold.

1

Input voltage to OV pin is above threshold.

4

Reserved

0

Always reads as 0.

3

HS_INLIM

Latched

0

The ADM1275 has not actively limited the current into the load.

1

The ADM1275 has actively limited current into the load. This bit differs from

the IOUT_OC_FAULT bit in that the HS_INLIM bit is set immediately, whereas

the IOUT_OC_FAULT bit is not set unless the time limit set by the capacitor

on the TIMER pin elapses.

[2:1]

HS_SHUTDOWN_CAUSE

Latched

00

The ADM1275 is either enabled and working correctly, or has been shut

down using the OPERATION command.

01

10

11

An IOUT_OC_FAULT condition occurred that caused the ADM1275 to shut down.

A VIN_UV_FAULT condition occurred that caused the ADM1275 to shut down.

A VIN_OV_FAULT condition occurred that caused the ADM1275 to shut down.

0

IOUT_WARN2

Latched

0

No overcurrent condition on the output supply detected by the power

monitor using the IOUT_WARN2_LIMIT command.

1

An undercurrent or overcurrent condition on the output supply was

detected by the power monitor using the IOUT_WARN2_LIMIT command.

The polarity of the threshold condition is set by the IOUT_WARN2_SELECT bit

using the DEVICE_CONFIG command.

READ_VIN

Code: 0x88, read word. Value after reset: 0x0000.

Table 26. Bit Descriptions for READ_VIN Command

Bits

[15:12]

[11:0]

Bit Name

Reserved

VIN

Settings

0000

Description

Always reads as 0000.

Input voltage from the SENSE+ pin measurement, expressed in ADC codes.

Rev. D | Page 40 of 48

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