MAX34441EVKIT# Maxim Integrated, MAX34441EVKIT# Datasheet - Page 21

• 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

The following example demonstrates how the host can
send and retrieve values from the device. Table 4 shows
the coefficients used in the following parameters.
Table_4._Coefficients_for_DIRECT_Format_
Value
If a host wants to set the device to change the power-
supply output voltage to 3.465V (or 3465mV), the cor-
responding VOUT_MARGIN_HIGH value is:
Conversely, if the host received a value of 0D89h on a
READ_VOUT command, this is equivalent to:
Power supplies and power converters generally have
no way of knowing how their outputs are connected to
ground. Within the power supply, all output voltages are
most commonly treated as positive. Accordingly, all out-
put voltages and output voltage-related parameters of
PMBus devices are commanded and reported as posi-
tive values. It is up to the system to know that a particular
output is negative if that is of interest to the system. All
output-voltage-related commands use 2 data bytes.
For reporting faults/warnings to the host on a real-time
basis, the device asserts the open-drain ALERT pin (if
enabled in MFR_MODE) and sets the appropriate bit in
the various status registers. On recognition of the ALERT
assertion, the host or system manager is expected to poll
the I
Table_5._Device_Parametric_Monitoring_States
Y = (1 x 3465 + 0) x 10
COMMAND_
X = (1/1) x (0D89h x 10
Overtemperature
Power-Up Time
CODE
PARAMETER
Undervoltage
2
8Bh
25h
Overvoltage
Overcurrent
Fan Speed
C bus to determine the device asserting ALERT.
Fault Management and Reporting
VOUT_MARGIN_HIGH
READ_VOUT
PMBus 5-Channel Power-Supply Manager
COMMAND_NAME
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
•
•
•
•
•
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
Temp sensor enabled (ENABLE in MFR_TEMP_SENSOR_CONFIG = 1)
Fan enabled (bit 7 in FAN_CONFIG_1_2 = 1)
0
= 3465 (decimal) = 0D89h (hex)
-(-0)
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
PSEN output is active
Channel’s VOUT must have exceeded VOUT_UV_FAULT during
channel power-up
Power supply enabled (TON_MAX_FAULT_LIMIT ≠ 0000h)
Current monitoring enabled (IOUT_OC_FAULT_LIMIT ≠ 0000h)
REQUIRED_CONDITIONS_FOR_ACTIVE_MONITORING
- 0) = 3465mV = 3.465V
m
1
1
and Intelligent Fan Controller
b
0
0
R
0
0
The host sends the SMBus ARA (0001 100). The device
ACKs the SMBus ARA, transmits its slave address, and
deasserts ALERT. The system controller then communi-
cates with PMBus commands to retrieve the fault/warn-
ing status information from the device.
See the individual command sections for more details.
Faults and warnings that are latched in the status regis-
ters are cleared when any one of the following conditions
occurs:
• A CLEAR_FAULTS command is received.
• The RST pin is toggled.
• Bias power to the device is removed and then reapplied.
One or more latched-off power supplies is only restarted
when one of the following occurs:
• The output is commanded through the CONTROL
• The RST pin is toggled.
• Bias power to the device is removed and then reapplied.
A power supply is not allowed to turn on if any faults the
supply responds to are detected. Only after the faults
clear is the power supply allowed to turn on. When global
supplies are being sequenced on, a fault on any of the
supplies keeps all supplies from being turned on.
A system-wide power-up (OPERATION command is
received to turn the supplies on when PAGE is 255 or the
CONTROL pin is toggled to turn on the supplies) allows
all enabled power supplies to power-up. If any faults are
detected once the supplies start to turn on, the response
of MFR_FAULT_RESPONSE is performed.
The device responds to fault conditions accord-
ing to the manufacturer fault response command
(MFR_FAULT_RESPONSE). This command byte
determines how the device should respond to each
pin, the OPERATION command, to turn off and then
turn back on.
Monitor only during power-on
ACTION_DURING_A_FAULT
Stop monitoring while the
Continue monitoring
Continue monitoring
Continue monitoring
Continue monitoring
power supply is off
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