ADP1050ACPZ-R7 datasheet(54/93 Pages) AD

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Data Sheet

ADP1050

CAPABILITY

This command summarizes the PMBus optional communication protocols supported by the ADP1050. The reading of this command

should result in 0x20.

Table 20. Register 0x19—CAPABILITY

Bits

Bit Name/Function

R/W

Description

[7]

Packet error

Checks the packet error capability of the device.

0 = not supported.

[6:5]

Maximum bus speed

Checks the PMBus speed capability of the device.

01 = maximum bus speed of 400 kHz.

SMBALERT

Checks support of the SMBALERT pin and the SMBus alert response protocol.

0 = not supported.

[3:0]

Reserved

Reserved.

VOUT_MODE

The VOUT_MODE command sets the data format for output voltage related data. The data byte for the VOUT_MODE command consists of

a 3-bit mode and 5-bit exponent parameter. The 3-bit mode determines whether the device uses linear format or direct format for the output

voltage related commands. The 5-bit parameter sets the exponent value for linear format.

Table 21. Register 0x20—VOUT_MODE

Bits

Bit Name/Function

R/W

Description

[7:5]

Mode

Output voltage data format. The value is fixed at 000, meaning that only linear format is

supported.

[4:0]

Exponent

The N value for the output voltage related commands in linear format: V = Y × 2N.

The value is fixed at 10110 (twos complement, −10 decimal). The exponent for linear format

values is −10.

VOUT_COMMAND

The VOUT_COMMAND command sets the output voltage. The VOUT_TRANSITION_RATE command is used if this command is

modified while the output is active and in a steady state condition. The maximum programmable output voltage is 64 V.

Table 22. Register 0x21—VOUT_COMMAND

Bits

Bit Name/Function

R/W

Description

[15:0]

Mantissa

R/W

Sets the output voltage reference value, in volts.

16-bit unsigned integer Y value for linear format: V = Y × 2N.

N is defined in the VOUT_MODE command.

VOUT_TRIM

The VOUT_TRIM command applies a fixed offset voltage to the output voltage command value. It is typically set by the user to trim the

output voltage at the time that the PMBus device is assembled into the system of the user. The trim range is −32 V to +32 V, and each LSB

resolution is 2−10 = 0.9765625 mV.

Table 23. Register 0x22—VOUT_TRIM

Bits

Bit Name/Function

R/W

Description

[15:0]

Mantissa

R/W

Sets the output voltage trim value.

16-bit twos complement Y value for linear format: V = Y × 2N.

N is defined in the VOUT_MODE command.

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