Linear Technology Analog Devices LTC3882-1, Техническое описание

Страница: 38 / 108

LTC3882-1
38
Rev A
For more information www.analog.com
PMBus COMMAND SUMMARY
Table 7. PMBus Command Summary
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
SEE
PAGE
PAGE 0x00 Channel (page) presently selected for
any paged command.
R/W Byte N Reg 0x00 69
OPERATION 0x01 On, off and margin control. R/W Byte Y Reg
l
0x80 73
ON_OFF_CONFIG 0x02 RUN pin and PMBus on/off command
configuration.
R/W Byte Y Reg
l
0x1E 72
CLEAR_FAULTS 0x03 Clear all set fault bits. Send Byte N 90
PAGE_PLUS_WRITE 0x05 Write a command directly to a specified
page.
W Block N 69
PAGE_PLUS_READ 0x06 Read a command directly from a
specified page.
Block R/W
Process
N 70
WRITE_PROTECT 0x10 Protect the device against unintended
PMBus modifications.
R/W Byte N Reg
l
0x00 70
STORE_USER_ALL 0x15 Store entire operating memory in
EEPROM.
Send Byte N 102
RESTORE_USER_ALL 0x16 Restore entire operating memory from
EEPROM.
Send Byte N 102
CAPABILITY 0x19 Summary of supported optional PMBus
features.
R Byte N Reg 0xB0 71
SMBALERT_MASK 0x1B Mask ALERT activity Block R/W Y Reg
l
see CMD
details
98
VOUT_MODE 0x20 Voltage-related format (Linear) and
exponent.
R Byte Y Reg 0x14
2
–12
79
VOUT_COMMAND 0x21 Nominal V
OUT
value. R/W Word Y L16 V
l
1.0V
0x1000
79
VOUT_MAX 0x24 Maximum V
OUT
that can be set by any
command, including margin.
R/W Word Y L16 V
l
5.5V
0x5800
80
VOUT_MARGIN_HIGH 0x25 V
OUT
at high margin, must be greater
than VOUT_COMMAND.
R/W Word Y L16 V
l
1.05V
0x10CD
80
VOUT_MARGIN_LOW 0x26 V
OUT
at low margin, must be less than
VOUT_COMMAND.
R/W Word Y L16 V
l
0.95V
0x0F33
80
VOUT_TRANSITION_RATE 0x27 V
OUT
slew rate for programmed output
changes.
R/W Word Y L11 V/ms
l
0.25
0xAA00
84
FREQUENCY_SWITCH 0x33 PWM frequency control. R/W Word N L11 kHz
l
500kHz
0xFBE8
74
VIN_ON 0x35 Minimum input voltage to begin power
conversion.
R/W Word N L11 V
l
6.5V
0xCB40
78
VIN_OFF 0x36 Decreasing input voltage at which power
conversion stops.
R/W Word N L11 V
l
6.0V
0xCB00
78
IOUT_CAL_GAIN 0x38 Ratio of I
SENSE
±
voltage to sensed
current.
R/W Word Y L11 mΩ
l
0.63mΩ
0xB285
82
VOUT_OV_FAULT_LIMIT 0x40 V
OUT
overvoltage fault limit. R/W Word Y L16 V
l
1.1V
0x119A
80
VOUT_OV_FAULT_RESPONSE 0x41 V
OUT
overvoltage fault response. R/W Byte Y Reg
l
0xB8 95
VOUT_OV_WARN_LIMIT 0x42 V
OUT
overvoltage warning limit. R/W Word Y L16 V
l
1.075V
0x1133
81