LT7184SRVPBF datasheet(50/52 Pages) AD

50 / 52 page

Data Sheet

LT7184S

analog.com

Rev. 0

50 of 52

COMMAND

CODE

DESCRIPTION

TYPE

PAGED

FORMAT

UNITS

NVM

DEFAULT

MFR_PWM_PHASE_LT7184S

0xF5

Set PWM phase.

R/W

Word

IEEE or

L11

Degrees

Ch0:0

(0x0000)

Ch1:180.0

(0x59A0)

MFR_SYNC_CONFIG_LT7184S

0xF6

SYNC pin input/output

configuration.

R/W

Byte

0x00

MFR_PIN_CONFIG_STATUS

0xF7

Pin configuration fault

status.

R Byte

MFR_RAIL_ADDRESS

0xFA

Common address for

PolyPhase outputs to adjust

common parameters.

R/W

Byte

0x80

MFR_DISABLE_OUTPUT

0xFB

Disables regulator outputs

until reset.

R/W

Byte

0x00

MFR_EE_USER_WP

0xFC

Disables commands that

write user NVM.

R/W

Byte

0x00

MFR_RESET

0xFD

Command reset without

requiring a power down.

Send

Byte

Table 17.Supported Data Formats

PMBus

DEFINITION

EXAMPLES

TERMINOLOGY

SPECIFICATION

REFERENCE

L11

Linear11

Rev 1.3.1 Part II 7.3

Floating point 16-but data:

Value = Y × 2N

Where N = Exponent = b[14:11] and Y = b[10:0].

Both exponent and fraction are two

complement-coded binary integers.

b[15:0] = 0x9807

= 7 x 2-13 = 8.54 x 10-4

b[15:0] = 0x7FFE

= -2

x 27 = -256

UL16

ULinear16

Rev 1.3.1 Part II

8.4.1.1

Fixed point 16-bit data:

Value = Y × 2( −12)

Where Y = decimal(b[15:0]), an unsigned

integer

b[15:0] = 0x4D80 =

19840 x 2-12 = 4.84375

Per-bit meaning is defined in the command

description in the LT7184S PMBus/I2C

Reference Manual.

PMBus STATUS_BYTE

command.

IEEE

IEEE-754 Half

Precision Floating

Point

Rev 1.3.1 Part II

8.4.4

Floating point 16-bit data: for normal values:

�� = (−1)�� × 2�� × (�� +

��

1024

)

Where:

S = b[15];

N = Exponent Bias encoding of

b[14:10], if b[14:10] = 0, N = -14,

else N = decimal (b[14:10])-15;

P = 0 if b[14:10] = 0, otherwise P = 1;

and M = decimal(b[9:0]).

b[15:0] = 0x8001 =

(-1)1 x 2–14 (0+1/1024) =

-5.97 x 10-8

b[15:0] = 0x3E4C =

(-1)0 x 20 x

(1+588/1024) = 1.57

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