ADP1055ACPZ-R7 datasheet(70/140 Pages) AD

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ADP1055

Data Sheet

Rev. A | Page 70 of 140

IOUT_UC_FAULT_LIMIT

The IOUT_UC_FAULT_LIMIT command sets the current (in amperes) measured at the sense/output pin that causes an undercurrent

fault condition.

Table 49. Register 0x4B—IOUT_UC_FAULT_LIMIT

Bits

Bit Name

R/W

Description

[15:11]

Exponent-N

R/W

Twos complement N-exponent used in linear data format (X = Y × 2N).

[10:0]

Mantissa-Y

R/W

Twos complement Y-mantissa used in linear data format (X = Y × 2N).

IOUT_UC_FAULT_RESPONSE

The IOUT_UC_FAULT_RESPONSE command instructs the device on actions to take due to an output undercurrent fault condition. The

device notifies the host and sets the NONE_OF_THE_ABOVE bit in the STATUS_BYTE register, the IOUT bit in the STATUS_WORD

Table 50. Register 0x4C—IOUT_UC_FAULT_RESPONSE

Bits

Bit Name

R/W

Description

[7:6]

Response

R/W

Determines the device response to an undercurrent fault condition.

Bit 7

Bit 6

Response

Do nothing.

Operate in current limiting mode, maintaining the output current at

IOUT_OC_FAULT_LIMIT. If VOUT falls below the IOUT_OC_LV_FAULT_LIMIT,

respond as programmed by the retry setting (Bits[5:3]).

Continue operation in current limiting mode for the delay time (Bits[2:0]). If the

device is still in current limiting mode, respond as programmed by the retry

setting (Bits[5:3]).

Shut down, disable the output, and respond as programmed by the retry

setting (Bits[5:3]).

[5:3]

Retry setting

R/W

Number of retry attempts following a fault condition. A fault condition can be cleared by a reset,

a power-off/power-on sequence, or a loss of bias power.

Bit 5

Bit 4

Bit 3

Number of Retries

Infinite

[2:0]

Delay times

R/W

Number of delay time units (see Register 0xFE3E).

OT_FAULT_LIMIT

The OT_FAULT_LIMIT command sets the threshold value (in °C) that causes an overtemperature fault condition.

Table 51. Register 0x4F—OT_FAULT_LIMIT

Bits

Bit Name

R/W

Description

[15:11]

Exponent-N

R/W

Twos complement N-exponent used in linear data format (X = Y × 2N).

[10:0]

Mantissa-Y

R/W

Twos complement Y-mantissa used in linear data format (X = Y × 2N).

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