MAX34441EVKIT# Maxim Integrated, MAX34441EVKIT# Datasheet - Page 14

• Manufacturer Part Number: MAX34441EVKIT#
• Description: Power Management IC Development Tools MAX34441 Eval Kit
• Manufacturer: Maxim Integrated
• Type: PWM Controllersr
• Series: MAX34441r

Specifications of MAX34441EVKIT#

• Rohs: yes
• Product: Power Management Development Tools
• Tool Is For Evaluation Of: MAX34441
• Interface Type: I2C
• Maximum Operating Temperature: + 85 C
• Part # Aliases: 90-34441#K00

PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
The MAX34441 is a highly integrated system monitor
based upon a 4MHz, 16-bit, MAXQ
factory-programmed functionality to monitor up to five
power supplies and a system cooling fan. The device
provides power-supply closed-loop control, fan-speed
monitoring, and local/remote thermal-sensing facilities.
The power-supply manager monitors the power-supply
output voltage and constantly checks for user-pro-
grammable overvoltage and undervoltage thresholds. It
also can margin the power-supply output voltage up or
down by a user-programmable level. The margining is
performed in a closed-loop arrangement, whereby the
device automatically adjusts a pulse-width-modulated
(PWM) output and then measures the resultant output
voltage. The power-supply manager can also sequence
the supplies in any order at both power-up and power-
down. With the addition of an external current-sense
amplifier, the device can also monitor currents.
Table_1._PMBus_Command_Codes
MAXQ is a registered trademark of Maxim Integrated
Products, Inc.
14
CODE
2Ah
3Ah
3Bh
4Ah
00h
01h
02h
03h
10h
11h
12h
19h
20h
25h
26h
38h
40h
42h
43h
44h
46h
4Fh
PAGE
OPERATION
ON_OFF_CONFIG
CLEAR_FAULTS
WRITE_PROTECT
STORE_DEFAULT_ALL
RESTORE_DEFAULT_ALL
CAPABILITY
VOUT_MODE
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VOUT_SCALE_MONITOR
IOUT_CAL_GAIN
FAN_CONFIG_1_2
FAN_COMMAND_1
VOUT_OV_FAULT_LIMIT
VOUT_OV_WARN_LIMIT
VOUT_UV_WARN_LIMIT
VOUT_UV_FAULT_LIMIT
IOUT_OC_WARN_LIMIT
IOUT_OC_FAULT_LIMIT
OT_FAULT_LIMIT
COMMAND_NAME
Detailed Description
M
microcontroller with
Send Byte
Send Byte
Send Byte
Read Byte
Read Byte
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
R/W Byte
R/W Byte
R/W Byte
R/W Byte
R/W Byte
TYPE
PAGE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0–4
—
—
—
W
W
W
R
R
PAGE
Thermal monitoring can be accomplished using up to six
temperature sensors, including an on-chip thermal sen-
sor, four DS75LV digital thermometers, and a remote ther-
mal diode. Temperature offset can be added to individual
sensors to compensate for thermal differences in a sys-
tem. Communication with the DS75LV temperature sensor
is conducted through a dedicated I
The device also contains closed-loop fan-speed control.
Based on user-programmable settings for fan-control
PWM duty cycles or for fan RPM speeds at particu-
lar temperature breakpoints, the device automatically
adjusts the fan speed in a manner to reduce audible
noise and power consumption.
The device provides ALERT and FAULT output signals.
Host communications are conducted through a PMBus-
compatible communications port. Address input con-
nections are also provided to allow up to four MAX34441
devices to reside on the system’s I/O bus.
R/W
R/W
R/W
R/W
R/W
—
—
—
—
—
—
—
—
—
—
—
—
W
W
W
5
(NOTE_1)
R
R
PAGE
6–11
R/W
R/W
R/W
R/W
—
—
—
—
—
—
—
—
—
—
—
—
—
W
W
W
R
R
PAGE
R/W
R/W
R/W
255
—
—
—
—
—
—
—
—
—
—
—
—
—
W
W
W
W
R
R
NO._OF_
BYTES
1
1
1
0
1
0
0
1
1
2
2
2
2
1
2
2
2
2
2
2
2
2
(NOTE_2)
STORED
2
FLASH_
FIXED
C/SMBus interface.
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
DEFAULT_
(NOTE_2)
00h/10h
VALUE
0000h
0000h
7FFFh
0000h
FFFFh
7FFFh
7FFFh
0000h
0000h
7FFFh
0000h
7FFFh
1Ah
00h
00h
00h
40h
00h
—
—
—