ADP1052ACPZ-R7 datasheet(69/113 Pages) AD

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Data Sheet

ADP1052

Rev. B | Page 69 of 113

IOUT_OC_FAULT_LIMIT

The IOUT_OC_FAULT_LIMIT command sets the threshold value for overcurrent protection of the output voltage.

Table 43. Register 0x46—IOUT_OC_FAULT_LIMIT

Bit

Bit Name/Function

R/W

Description

[15:11]

Exponent

R/W

5-bit, twos complement, N value for linear format X = Y × 2N. N should be in the range of

−12 to 0 decimal.

[10:0]

Mantissa

R/W

11-bit, twos complement, Y value for linear format X = Y × 2N.

IOUT_OC_FAULT_RESPONSE

Table 44. Register 0x47—IOUT_OC_FAULT_RESPONSE

Bit

Bit Name/Function

R/W

Description

[7:6]

Response

R/W

00 = operates in current-limit mode, maintaining the output current at the IOUT_OC_FAULT_LIMIT,

regardless of the output voltage (known as the constant current).

01 = operates in current-limit mode, maintaining the output current at the IOUT_OC_FAULT_LIMIT

for as long as the output voltage remains above the IOUT_OC_LV_FAULT_LIMIT. If the output

voltage is pulled down to less than that value, the ADP1052 shuts down and responds according

to the retry setting in Bits[5:3].

10 = continues operation in current-limit mode for the Delay Time 1 set by Bits[2:0], regardless of

the output voltage. If the ADP1052 is still operating in current limit at the end of the delay time, it

responds as programmed by the retry setting in Bits[5:3].

11 = shuts down and responds as programmed by the retry setting in Bits[5:3].

[5:3]

Retry setting

R/W

000 = restart not attempted. The output remains disabled until the fault is cleared.

001 to 110 = attempts to restart the number of times set by these bits. If the ADP1052 fails to

restart (the fault condition is no longer present and the ADP1052 is delivering power to the output

and operating as programmed) in the allowed number of retries, it disables the output and remains off

until the fault is cleared. The time between the start of each attempt to restart is set by the Delay

Time 2 value in Bits[2:0], together with the delay time unit specified for that particular fault.

111 = attempts to restart continuously, without limitation, until it is commanded off (by the CTRL

pin or the OPERATION command, or both), bias power is removed, or another fault condition causes

the unit to shut down.

[2:0]

Delay time

R/W

These bits set the delay time.

Bit 2

Bit 1

Bit 0

Delay Time 1 (ms)

Delay Time 2 (ms)

252

588

924

1260

160

1596

320

1932

640

2268

1280

2604

IOUT_OC_LV_FAULT_LIMIT

The IOUT_OC_LV_FAULT_LIMIT command sets the voltage threshold in cases for which the response to an overcurrent condition is to

operate in a constant current mode unless the output voltage is pulled below the specified limit value.

Table 45. Register 0x48—IOUT_OC_LV_FAULT_LIMIT

Bits

Bit Name/Function

R/W

Description

[15:0]

Mantissa

R/W

16-bit, unsigned integer Y value for linear format X = Y × 2N. N is defined in the VOUT_MODE

command.

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