ADP1055ACPZ-R7 datasheet(72/140 Pages) AD

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ADP1055

Data Sheet

Rev. A | Page 72 of 140

VIN_OV_FAULT_RESPONSE

The VIN_OV_FAULT_RESPONSE command instructs the device on the actions to take due to an input overvoltage fault condition. The

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

Table 55. Register 0x56—VIN_OV_FAULT_RESPONSE

Bits

Bit Name

R/W

Description

[7:6]

Response

R/W

Determines the device response to an input 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 times

R/W

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

VIN_UV_FAULT_LIMIT

The VIN_UV_FAULT_LIMIT command sets the lower voltage threshold (in volts) measured at the sense/input pin that causes an

undervoltage fault condition.

Table 56. Register 0x59—VIN_UV_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).

VIN_UV_FAULT_RESPONSE

The VIN_UV_FAULT_RESPONSE command instructs the device on the actions to take due to an input undervoltage fault condition.

The device notifies the host and sets the VIN_UV_FAULT bit in the STATUS_BYTE register, the INPUT bit in the STATUS_WORD

Table 57. Register 0x5A—VIN_UV_FAULT_RESPONSE

Bits

Bit Name

R/W

Description

[7:6]

Response

R/W

Determines the device response to an input undervoltage 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.

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