ADP1055ACPZ-R7 datasheet(101/140 Pages) AD

101 / 140 page

Data Sheet

ADP1055

Rev. A | Page 101 of 140

The VOUT_OV_FAST_FAULT_RESPONSE command instructs the device on the actions to take due to an output fast overvoltage fault

condition. The device notifies the host and sets the NONE_OF_THE_ABOVE bit in STATUS_BYTE register, the MFR_SPECIFIC bit in

STATUS_WORD register, and the VOUT_OV_FAST_FAULT bit in STATUS_MFR_SPECIFIC register.

Table 165. Register 0xFE34—VOUT_OV_FAST_FAULT_RESPONSE

Bits

Bit Name

R/W

Description

[7:6]

Response

R/W

Determines the device response to a fast overvoltage fault condition.

Bit 7

Bit 6

Response

Do nothing.

Continue operation for the delay time (Bits[2:0]). If the fault persists, retry the

number of times specified by Bits[5:3].

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

setting (Bits[5:3]).

Disable the output while the fault is present. Operation resumes and the

output is enabled when the fault condition no longer exists.

[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 time

R/W

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

The IOUT_OC_FAST_FAULT_RESPONSE command instructs the device on the actions to take due to an output fast overcurrent fault

condition. The device notifies the host and sets the NONE_OF_THE_ABOVE bit in STATUS_BYTE register, the MFR_SPECIFIC bit in

STATUS_WORD register, and the IOUT_OC_FAST_FAULT bit in STATUS_MFR_SPECIFIC register.

Table 166. Register 0xFE35—IOUT_OC_FAST_FAULT_RESPONSE

Bits

Bit Name

R/W

Description

[7:6]

Response

R/W

Determines the device response to a fast overcurrent fault condition.

Bit 7

Bit 6

Response

Operate in current limiting mode, maintaining the output current at IOUT_OC_FAULT_LIMIT.

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).

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