ADP1052ACPZ-R7 datasheet(64/113 Pages) AD

64 / 113 page

ADP1052

Data Sheet

Rev. B | Page 64 of 113

VOUT_TRANSITION_RATE

When the device receives either a VOUT_COMMAND command

or an OPERATION command (margin high, margin low) that

causes the output voltage to change, the VOUT_TRANSITION_

RATE command sets the rate, in mV/µs, at which the VS± pins

change voltage. This commanded rate of change does not apply

when the unit is turned on or off. The maximum positive value

(0x7BFF) of the two data bytes indicates that the unit makes the

transition as quickly as possible. Only the following limited

options are supported by the ADP1052.

Table 29. Register 0x27—VOUT_TRANSITION_RATE

(Rate-of-Change Options Supported by the ADP1052)

Rate of Change (mV/μs)

1001100000001101 (0x980D)

0.0015625

1010000000001101 (0xA00D)

0.003125

1010100000001101 (0xA80D)

0.00625

1011000000001101 (0xB00D)

0.0125

1011100000001101 (0xB80D)

0.025

1100000000001101 (0xC00D)

0.050

1100100000001101 (0xC80D)

0.1

1101000000001101 (0xD00D)

0.2

0111101111111111 (0x7BFF)

Infinite (default)

Table 30. Register 0x27—VOUT_TRANSITION_RATE

Bits

Bit Name/Function

R/W

Description

[15:11]

Exponent

R/W

5-bit, twos complement,

N value for linear format,

X = Y × 2N.

[10:0]

Mantissa

R/W

11-bit, twos complement,

Y value for linear format,

X = Y × 2N.

VOUT_DROOP

The VOUT_DROOP command sets the rate, in mV/A (mΩ), at

which the output voltage decreases (or increases) with increasing

(or decreasing) output current for use with the adaptive voltage

positioning requirements and passive current sharing schemes.

The range of VOUT_DROOP in the ADP1052 is 0x0000 to

0x00FF (0 mΩ to 255 mΩ). Values not within this range are

invalid. An invalid value results in a CML error.

Table 31. Register 0x28—VOUT_DROOP

Bits

Bit Name/Function

R/W

Description

[15:11]

Exponent

5-bit, twos complement,

N value for linear format,

X = Y × 2N. N is fixed at 0.

[10:8]

Mantissa high bits

Mantissa high bits, Y[10:8],

value fixed at 0.

[7:0]

Mantissa low bits

R/W

Mantissa low bits, Y[7:0],

value for linear format,

X = Y × 2N.

VOUT_SCALE_LOOP

The VOUT_SCALE_LOOP command is equal to the feedback

resistor ratio. The nominal output voltage is set by a resistor

divider and the internal 1 V reference voltage. For example, if

the nominal output voltage is 12 V, the VOUT_SCALE_LOOP

value = 1 V/12 V = 0.08333 and the VOUT_SCALE_LOOP can

be set as 0xA155.

VOUT

RESISTOR

DIVIDER

RATIO

ERROR

PROCESSING/

CONTROL LOOP

PMBus DEVICE

VOUT_

SCALE_

LOOP

VOUT_COMMAND

Figure 63. Conceptual View of the VOUT_SCALE_LOOP Command

Table 32. Register 0x29—VOUT_SCALE_LOOP

Bits

Bit Name/Function

R/W

Description

[15:11]

Exponent

R/W

5-bit, twos complement,

N value for linear format,

KR = Y × 2N, where N is in

the range of −12 to 0

decimal.

[10:0]

Mantissa

R/W

11-bit, twos complement,

Y value for linear format,

KR = Y × 2N.

VOUT_SCALE_MONITOR

This command is typically the same as the VOUT_SCALE_LOOP

command. Use VOUT_SCALE_MONITOR for reading the output

voltage with the READ_VOUT command (Register 0x8B).

Table 33. Register 0x2A—VOUT_SCALE_MONITOR

Bits

Bit Name/Function

R/W

Description

[15:11]

Exponent

R/W

5-bit, twos complement, N

value for linear format, KR

= Y × 2N, where N is in the

range of −12 to 0 decimal.

[10:0]

Mantissa

R/W

11-bit, twos complement,

Y value for linear format,

KR = Y × 2N.

FREQUENCY_SWITCH

The FREQUENCY_SWITCH command, which sets the switching

frequency in kHz, is in linear format. Only the following limited

switching frequency options are supported by the ADP1052. In the

ADP1052, because the switching frequency is calculated from the

switching period, the switching period value that is used is an

accurate measure, whereas the switching frequency may not be.

For example, for the first switching frequency option of 49 kHz

(see Table 34) the actual switching frequency is calculated by

1/(20.48 µs) = 48.828125 kHz, which is simplified (rounded) to

49 kHz.

To avoid an incorrect switching frequency setting, the GO

commands in Register 0xFE61[2:1] must be used to latch this

setting and the PWM setting.

ADP1052ACPZ-R7 датащи(PDF) 64 Page - Analog Devices

ADP1052ACPZ-R7 датащи(HTML) 64 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL