ADP1052ACPZ-R7 datasheet(92/113 Pages) AD

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ADP1052

Data Sheet

Rev. B | Page 92 of 113

VOLTAGE SENSE AND LIMIT SETTING REGISTERS

Table 137. Register 0xFE20—VS Gain Trim

Bits

Bit Name/Function

R/W

Description

Trim polarity

R/W

0 = positive gain is introduced.

1 = negative gain is introduced.

[6:0]

VS gain trim

R/W

These bits set the amount of gain trim that is applied to the VS ADC reading. This register trims the

voltage reading in the READ_VOUT command after the VOUT_CAL_OFFSET trimming is completed.

This register is trimmed until the READ_VOUT reading in the register exactly matches the output

voltage measurement result.

Table 138. Register 0xFE25—Prebias Start-Up Enable

Bits

Bit Name/Function

R/W

Description

Prebias startup

enable

R/W

Setting this bit enables the prebias start-up function. If it is enabled, the soft start ramp starts from the

current output voltage. The initial PWM modulation value is generated based on the following: the

initial modulation calculation, Register 0xFE6C[1] = 1, unless closed-loop input voltage feedforward

operation mode is in use.

[6:0]

Reserved

R/W

Reserved.

Table 139. Register 0xFE26—VOUT_OV_FAULT Flag Debounce

Bits

Bit Name/Function

R/W

Description

[7:6]

VOUT_OV_FAULT

flag debounce

R/W

These bits set the VOUT_OV_FAULT flag debounce time.

Bit 7

Bit 6

Typical Debounce Time (μs)

[5:0]

Reserved

R/W

Reserved

Table 140. Register 0xFE28—VF Gain Trim

Bits

Bit Name/Function

R/W

Description

Trim polarity

R/W

0 = positive gain is introduced.

1 = negative gain is introduced.

[6:0]

VF trim

R/W

These bits set the amount of gain trim that is applied to the VF ADC reading. This register trims the

voltage at the VF pin for external resistor tolerances. When there is 1 V on the VF pin, this register is

trimmed until the VF value register reads 1280 decimal (0x500).

Table 141. Register 0xFE29—VIN_ON and VIN_OFF Delay

Bits

Bit Name/Function

R/W

Description

[7:6]

Reserved

R/W

Reserved.

VIN_UV_FAULT enable

R/W

Setting this bit enables the VIN_ON value and the VIN_OFF value used to generate the

VIN_UV_FAULT flag.

Power conversion stop delay

R/W

Sets the delay time from when the VIN_LOW flag is set to when the power conversion stops.

0 = 0 ms.

1 = 1 ms.

[3:2]

Power conversion start delay

R/W

Sets the delay time from the clearing of the VIN_LOW flag to the start of the power conversion.

Bit 3

Bit 2

Delay Time (ms)

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