MAXIM MAX34451EVKIT

MAX34451 Evaluation Kit
General Description
The MAX34451 evaluation kit (EV kit) provides the hardware and software graphical-user interface (GUI) necessary to evaluate the MAX34451 PMBus™ 16-channel
V/I monitor and 12-channel sequencer/marginer. The EV
kit includes a MAX34451 installed as well as four power
supplies that can be sequenced, monitored, and
margined by the device.
EV Kit Contents
● Assembled Circuit Board Including MAX34451
● Mini USB Cable
Ordering Information appears at end of data sheet.
MAX34451 EV Kit Photo
Windows and Windows XP are registered trademarks and
registered service marks of Microsoft Corporation.
PMBus is a trademark of SMIF, Inc.
19-6695; Rev 0; 5/13
Evaluates: MAX34451
Features
● Easy Evaluation of the MAX34451
● Four Power-Supply Channels
● One Current-Sense Amplifier
● EV Kit Hardware is USB Powered (USB Cable
Included)
● USB HID interface
● Windows XP®- and Windows® 7-Compatible
Software
● RoHS Compliant
● Proven PCB Layout
● Fully Assembled and Tested
MAX34451 Evaluation Kit
Evaluates: MAX34451
Component List
DESIGNATION
QTY
DESIGNATION
QTY
B1
1
Black banana jack (GND)
R3A–R3D
4
49.9Ω ±1% resistors (0805)
C01, C05,
C211
3
1µF, X7R ceramic capacitors
(0805)
R4A–R4D
4
267Ω ±1% resistors (0805)
R5A–R5D
4
1kΩ ±1% resistors (0805)
7
0.1µF, X7R ceramic
capacitors (0805)
0
0
Do not populate, ceramic
capacitors (0805)
R20–R35, R40–R51,
R116–R118, R132,
R134, R162, R215,
R216
Do not populate,
resistors (0805)
C0A–C0D,
C2A–C2D, C160,
C162, C165, C201,
C202, C204
R60–R67, R100,
R130, R131, R210
12
4.7kΩ ±1% resistors (0805)
14
10µF, X5R ceramic capacitors
(0805)
R68–R75 R111,
R161, R164, R207
12
10kΩ ±1% resistors (0805)
C163
0
Do not populate, 470µF
aluminum capacitor
R104, R113, R115,
R124, R211, R212
6
330Ω ±1% resistors (0805)
C1A–C1D, C04,
C60–C67, C161,
C164, C203, C214
17
0.01µF, X7R ceramic
capacitors (0805)
R105, R106, R213
3
2.2kΩ ±1% resistors (0805)
R160, R163, R206
3
45.3kΩ ±1% resistors (0805)
R165
1
0.1Ω ±1% resistor (0805)
R203, R205
2
560Ω ±1% resistors (0805)
S1, S2
2
SPDT slide switches
S3
1
Single-pole pushbutton switch
S4
1
8-pole DIP switch
C02, C03,
C07–C10, C212
C06, C11,
C20–C35, C215
DESCRIPTION
C213
1
220nF, X7R ceramic capacitor
(0805)
D1, D5, D22
3
Schottky diodes
D2–D4, D7
4
Red LEDs (1206)
D20, D21
2
Red/green dual LEDs
DA–DD
4
Green LEDs (1206)
J1, J15
2
2-pin headers, 2.54mm pitch
J2, J22
2
4-pin headers, 2.54mm pitch
J3–J6
4
3-pin headers, 2.54mm pitch
J7, J8
2
10-pin (2 x 5) headers,
2.54mm pitch
J9–J14, J21
0
Do not populate, headers
J20
1
5-pin female Mini-USB
J23
1
8-pin (2 x 4) header,
2.54mm pitch
R0–R17, R36, R37,
R102, R107, R108,
R119, R201, R202,
R214
27
0Ω ±1% resistors (0805)
R0A–R0D,
R80–R91, R101,
R103, R109, R110,
R112, R114, R123,
R133, R135, R204
26
R1A–R1D
R2A–R2D
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DESCRIPTION
S5–S7
3
4-pole DIP switches
TP15, TP17–TP25,
TP27–TP42
26
White test points
TP2–TP6,
TP9–TP11
8
Black test points
TP1
1
Red test point
TP7, TP44
2
Orange test points
TP8, TP43
2
Yellow test points
U1
1
PMBus 16-channel V/I
monitor and 12-channel
sequencer/ marginer
(56 TQFN-EP*)
Maxim MAX34451ETN+
U1A–U1D, U4,
U5, U22
7
500mA LDO regulators
(8 TDFN-EP*)
Maxim MAX8902BATA+
100kΩ ±1% resistors (0805)
U2
1
Digital temperature sensor
(8 SO,150mil)
Maxim DS75LVS+
4
8.66kΩ ±1% resistors (0805)
4
3.09kΩ ±1% resistors (0805)
U3
1
25V/V precision current-sense
amplifier (SOT23)
Maxim MAX9938TEUK+
Maxim Integrated │ 2
MAX34451 Evaluation Kit
Evaluates: MAX34451
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
U20
1
Microcontroller (28 SO)
Microchip PIC18LF2550-I/SO
U21
1
50mA to 600mA current-limit
switch (6 SOT23)
Maxim MAX4995AAUT+
*EP = Exposed pad.
MAX34451 EV Kit Files
FILE
MAX34451EVKitSoftwareInstall.EXE
DESCRIPTION
Application program
Note: The .EXE file is downloaded as a .ZIP file.
Quick Start
Required Equipment
● MAX34451 EV kit hardware
● Windows XP or Windows 7 PC
● USB port
● Mini-USB cable (included)
Note: In the following sections, software-related items are
identified by bolding. Text in bold refers to items directly
from the install or EV kit software. Text in bold and underlined refers to items from the Windows operating system.
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
1) Ensure that jumpers/shunts on J23 and J1 are installed.
Note: The GND planes of the USB I2C dongle and the
EV kit are not connected. The GND jumper on J23
must be connected for proper communication.
2) Ensure that the 4-pole DIP switches RS (S5), PSEN
(S6), and PWM (S7) are in the on position.
3) Set the EV kit hardware on a nonconductive surface to
ensure that nothing on the PCB gets shorted together.
4) Prior to starting the GUI, connect the EV kit hardware
to a PC using the supplied Mini-USB cable, or equivalent. The power LED (D20) should be green and the
com LED (D21) should be red and slowly flash orange.
5) Windows should automatically begin installing the
necessary device driver. The USB interface of the
EV kit hardware is configured as an HID device and
therefore does not require a unique/custom device
driver. Once the driver installation is complete, a
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DESIGNATION
QTY
DESCRIPTION
X1
1
48MHz, 3.3V oscillator (SMD)
AVX KC3225A48.0000C30E00
—
9
Jumpers/shunts
—
1
Mini-USB cable
—
1
PCB: MAX34451 EV Kit
Windows message appears near the System Icon
menu, indicating that the hardware is ready to use. Do
not attempt to run the GUI prior to this message. If you
do, you must close the application and restart it once
the driver installation is complete. On some versions
of Windows, administrator privileges may be required
to install the USB device.
6) Once the device driver installation is complete,
visit www.maximintegrated.com/evkitsoftware to
download the latest version of the EV kit software,
MAX34451EVKitSoftwareInstall.ZIP. Save the EV kit
software to a temporary folder.
7) Open the .ZIP file and double-click the .EXE file to run
the installer. A message box stating: The publisher
could not be verified. Are you sure you want to
run this software? may appear. If so, click Yes.
8) The installer GUI appears. Click Next and then
Install. Once complete, click Close.
9)Go to Start | All Programs. Look for the
MAX34451EVKitSoftware folder and click on the
MAX34451EVKitSoftware.EXE inside the folder.
10)When the GUI appears, the text to the left of
the Maxim logo should display EV Kit Hardware
Connected. The com LED (D21) on the EV kit board
should turn green.
Detailed Description of Software
Software Startup
If the MAX34451 EV kit is connected when the software
is opened, the software first initializes the hardware to
communicate. The software then searches for all slave
addresses on the I2C bus and connects to the first valid
slave address. The GUI displays EV Kit Hardware
Connected to the left of the Maxim logo. If the EV kit
is not connected on software startup, then the GUI
populates with default EV kit values. Once the EV kit is
connected, the GUI executes the sequence above.
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MAX34451 Evaluation Kit
Menu and Status Bar
The File menu item contains Save, Load, and Exit
options. To save the current GUI configuration, click Save
Project As. This saves the device name, pin names, and
the RAM CRC to an XML file and saves PMBus configurations to a HEX file. If a device is connected, this reads and
saves data directly from the device; otherwise, it saves
the configuration that is currently displayed on the GUI.
The STORE_DEAULT_ALL (11h) command is appended
to the end of the HEX file so that the configuration is
saved to the main flash when the HEX file is loaded. Load
Project updates the GUI with the XML file, writes the HEX
file to the device, performs a STORE_DEFAULT_ALL
(11h), and then reads current values from the device. The
RAM CRC and main flash CRC are then read and compared to the CRC saved in the XML file. If a device is not
connected, the HEX file is written to a virtual device. The
HEX file only contains data for the PMBus commands that
are stored in flash. Create Report saves a CSV file that
contains all the configuration tables.
The Connection menu item allows the user to connect
to a desired device. Find Slave Addresses searches
for all slave addresses connected to the I2C bus. To
select a device, click Device1 Slave Address and all
the slave addresses found are shown and are selectable. Slave addresses 18h and 34h are not selectable to
prevent communicating with the alert response address
and factory-programmed address. If multiple devices are
connected, then the number of devices to read/write is
selected with the Number of Devices option.
The Auto Polling menu item allows the user to set the
automatic polling rate. Select the delay between reads by
choosing 300ms, 600ms, 800ms, 1000ms, 1500ms, or
2000ms. Press the Auto Polling On button in the status
bar to start the polling. Each poll reads the Power Status
(STATUS_WORD 79h), Fault Status (STATUS_WORD
79h), and the polled values for the Data Log Graph tab.
The Status and Margining tabs are only polled if the
tab is currently selected. If multiple devices are being
polled, then selected polling rate options can be disabled
to account for the longer time it takes to read all devices.
To stop polling, press the Auto Polling Off button on the
status bar. Polling automatically stops if items in the File
menu or Connection menu are selected. Polling also
stops if any buttons that involve action with the NV fault
log or flash are pressed.
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Evaluates: MAX34451
The GUI Lock menu item allows the user to safely browse
a configuration by preventing all controls from writing to
registers. The Clear Faults button in the status bar sends
the CLEAR_FAULTS (03h) command to clear any faults
or warnings. To turn the power supplies on or off, select
the Power On/Power Off button, which writes a value to
the OPERATION (01h) command. The supplies power
on with margining off and power off based on the Power
Down Action drop-down list on the Sequencing tab.
Status Log
The status log below the tabs displays all the actions that
the GUI performs. Whenever a PMBus command is read
or written, the action is confirmed by the log. To save the
log, press the Save Log button and the text in the box is
saved to a .TXT file. The log can also be cleared by pressing the Clear Log button.
Sequencing Tab
The Sequencing tab sheet (Figure 1) includes all the
sequence configuration and delays. All values on the tab
are read when the tab is selected. The On/Off Config
group box controls write to the ON_OFF_CONFIG (02h)
command to set when the power supplies sequence
on or off. The power supplies can be turned on with
bias, with the CONTROL0/CONTROL1 pin, or with the
OPERATION (01h) command by selecting the option on
the Turn Power Supplies ON drop-down list. To change
the CONTROL0/CONTROL1 pin’s polarity, select the
Active Low or Active High radio buttons. The channels can be powered down simultaneously or with a
TOFF delay by selecting the option in the Power Down
Action drop-down list. To edit the sequencing table, the
Output Select on the PSEN/GPO tab must be set to
Power Supply Enable (PSEN) and the Input Select on
the Monitoring tab must be set to Sequence + Voltage
Monitor. The Sequence On Select, PG/GPI Select, and
SEQ Match columns read/write to MFR_SEQ_CONFIG
(E8h). The PG/GPI Select columns can only be edited if
the Sequence On Select for that channel is set to one of
the PG/GPI combo options. To edit the SEQ Match column the Sequence On Select for that channel must be
set to one the of SEQ Pin Match options. The sequencing
delays can be set by writing values to TON Delay (TON_
DELAY 60h), TON Max (TON_MAX_FAULT_LIMIT 62h),
TON Seq Max (MFR_TON_SEQ_MAX E6h), and TOFF
Delay (TOFF_DELAY 64h). Each channel responds to the
FAULT pins selected in the FAULT Pin Response columns that read/write to MFR_FAULT_RESPONSE (D9h).
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 1. MAX34451 EV Kit GUI (Sequencing Tab)
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MAX34451 Evaluation Kit
Sequencing Graph Tab
The Sequencing Graph tab sheet (Figure 2) displays the
timing diagrams for all the sequencing channels. To edit
a channel’s sequencing timing, the Output Select on the
PSEN/GPO tab must be set to Power Supply Enable
(PSEN) and the Input Select on the Monitoring tab must
be set to Sequence + Voltage Monitor. When the Power
Up radio button is selected, the TON Delay (TON_DELAY
60h) and TON Max (TON_MAX_FAULT_LIMIT 62h)
values are displayed on the graph. To change TON Delay,
click and drag the green vertical bar; to change TON Max,
click and drag the red vertical bar. If TON Max is set to
0ms, then this limit is and the red bar are disabled. To set
a precise time with the graph, click and hold the green
or red vertical bar for a zoomed-in timeline. If a channel is set up to generate a SEQ on the Monitoring tab,
a yellow GEN tag is displayed to show which sequence
is generated. The Sequence On Select column is read
from the Sequencing tab. If this column is set to a SEQ
pin match option, a SEQ yellow tag appears at the time
location displayed in the Event Tag column. If there is a
GEN tag that matches the SEQ tag, the SEQ tag is lined
up with the GEN tag to have the same time. If there is
not a GEN tag that matches the SEQ tag, the tag can be
moved to a location where the user expects this signal to
occur by dragging the yellow tag or editing the value in
the Event Tag column. If the Sequence On Select is set
to a PG/GPI combo option, the PG/GPI Select columns
on the Sequencing tab are read to see which channel
combination triggers the sequence. If any of these checked
channels are set to GPI in the Input Select column on the
Monitoring tab, a yellow GPI tag appears at the time
location in the Event Tag column, which can be edited. If
the checked channels are not set to GPI, a PG yellow tag
appears. This PG tag is placed at the last TON Delay to
occur in the checked channels. The Power Down graph
displays the TOFF Delay (TOFF_DELAY 64h) and can be
changed by clicking and dragging the green vertical bar.
To view more of the time in the diagram, click and drag
the timeline at the bottom, or use the zooming controls
in the upper right-hand corner. To change the order of
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Evaluates: MAX34451
the channels, press the Sort By Time button or the Sort
By Device button for multiple devices. When in Sort By
Device mode, the channels can be reordered by clicking
and dragging the gripper box in the upper left-hand corner
of the channel row. The sequencing graph also has the
ability to detect circular dependance errors.
Monitoring Tab
The Monitoring tab sheet (Figure 3) displays the fault/
warn limit settings for each channel and for each temperature sensor. To read the settings, click on the Monitoring
tab and all the values are automatically read. To write to
a value, click on the corresponding cell, type in a valid
value, and either click another cell or press Enter on
the keyboard. In the VOLTAGE and CURRENT table,
the Input Select and SEQ Generate columns write to
MFR_CHANNEL_CONFIG (E4h). Some columns might
be grayed out depending on what is selected in the Input
Select column. The Nominal and V Ratio columns are
calculated based on a nominal ADC level of 1.8V to set
the VOUT_SCALE_MONITOR (2Ah). The resistive V
Ratio is found by dividing 1.8V by the Nominal value. The
C Gain column writes to IOUT_CAL_GAIN (38h) to set the
ratio of the voltage at the ADC input to the sensed current.
The fault/warn limits can be set by entering the voltage/
current level or the percent of the nominal in the UV Fault
(VOUT_UV_FAULT_LIMIT 44h), UV Warn (VOUT_UV_
WARN_LIMIT 43h), OV Warn (VOUT_OV_WARN_LIMIT
42h), OV Fault (VOUT_OV_FAULT_LIMIT 40h), PG On
(POWER_GOOD_ON 5Eh), PG Off (POWER_GOOD_
OFF 5Fh), OC Warn (IOUT_OC_WARN_LIMIT 46h), or
OC Fault (IOUT_OC_FAULT_LIMIT 4Ah) columns. In
the TEMPERATURE table, the sensors can be enable/
disabled in the Enable column, which writes to a bit in
MFR_TEMP_SENSOR_CONFIG F0h). The OT warn/
fault limits can be set by entering a value in the OT Warn
(OT_WARN_LIMIT 51h) or OT Fault (OT_FAULT_LIMIT
4Fh) columns. The ADC and averaging settings can
be adjusted with the ADC Conversion Time, ADC
Averaging, or IOUT Averaging drop-down lists, which all
write to MFR_MODE (D1h).
Maxim Integrated │ 6
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 2. MAX34451 EV Kit GUI (Sequencing Graph Tab)
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 3. MAX34451 EV Kit GUI (Monitoring Tab)
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Maxim Integrated │ 8
MAX34451 Evaluation Kit
PSEN/GPO Tab
The PSEN/GPO tab sheet (Figure 4) sets the function of
the PSENn pins. The Output Select, PG/GPI or Alarm
Channel Select, and PSEN/GPO Output Type columns
write to bits in the MFR_PSEN_CONFIG (D2h) command.
Output Select sets the function of the PSENn pin and the
PSEN/GPO Output Type column sets the output logic of
the pin. For PSEN10 and PSEN11, the Output Select
column has an extra option to configure PSEN10 as
FAULT2 and PSEN11 as SEQ. If either of these options
are selected, jumpers J5 or J4 on the EV kit board should
be moved to the corresponding position. The PG/GPI
or Alarm Channel Select, TON Delay (TON_DELAY
60h) and TOFF Delay (TOFF_DELAY 64h) columns can
only be edited when the Output Select is set to PG/GPI
Combination or ALARM.
PWM/GPO Tab
The PWM/GPO tab sheet (Figure 5) sets the function of
the PWMn pins. All the columns in the PWM table write to
the MFR_PWM_CONFIG (E7h) command. The Output
Select column sets the function of the PWMn pin and
the PWM/GPO Output Type sets the output logic of the
pin. For PWM7, the Output Select column has an extra
option to configure it as FAULT1. If this option is selected,
jumper J6 on the EV kit board should be moved to the
FAULT1 position. The PG/GPI or Alarm Channel Select,
ON Delay, and OFF Delay columns can only be edited
when the Output Select is set to PG/GPI Combination
or ALARM.
Fault Config Tab
The Fault Config tab sheet (Figure 6) contains all the
fault configuration settings. The Fault Retry time sets the
value in MFR_FAULT_RETRY (DAh). The fault configura-
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Evaluates: MAX34451
tion table writes to a channel’s MFR_FAULT_RESPONSE
(D9h). To edit a channel’s configuration, the Input Select
on the Monitoring tab must be set to monitor voltage or
current. To edit the FAULT Pin Assertion or FAULT Pin
Response columns, set the Global column to Global.
Margining Tab
The Margining tab sheet (Figure 7) includes the margin
configurations, margin fault status, a PWM calculator,
and a DAC calculator for the DS4424. All values on the
tab are read when the tab is selected. To edit a channel’s margin options, the Output Select on the PSEN/
GPO tab must be set to Power Supply Enable (PSEN)
and the Input Select on the Monitoring tab must be
set to Sequence + Voltage Monitor. For channels 0–7,
the Output Select on the PWM/GPO tab must also be
set to PWM Operation. The Margin column turns the
margin on/off by writing to the OPERATION (01h) command. To force all the channels to the same margin,
select the state in the Margin All Control drop-down list.
The Slope, Open Loop, PWM Level, and DAC Value
configure the PWMn outputs and the external DS4424
by writing bits in the MFR_MARGIN_CONFIG (DFh)
command. The margining limits can be set by entering
the voltage level or the percent of the nominal in the
Margin Low (VOUT_MARGIN_LOW 26h) and Margin
High (VOUT_MARGIN_HIGH 25h) columns. When the
margining is turned on, the margin fault status is shown in
the Status column read from STATUS_MFR_SPECIFIC
(80h). The Polled column displays the channel voltage
read from READ_VOUT (8Bh). To read the Status and
Polled values, press the Read Status and Vout button
or turn on polling with the Auto Polling On button. The
margin faults can be cleared by pressing the Clear Faults
button in the status bar.
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 4. MAX34451 EV Kit GUI (PSEN/GPO Tab)
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 5. MAX34451 EV Kit GUI (PWM/GPO Tab)
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 6. MAX34451 EV Kit GUI (Fault Config Tab)
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MAX34451 Evaluation Kit
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Figure 7. MAX34451 EV Kit GUI (Margining Tab)
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MAX34451 Evaluation Kit
The PWM Calculator is used to find the series resistance
(R3) and PWM level. The equations used to calculate the
outputs are given in Table 1.
The DAC Calculator is used to find the DS4424 external resistor (RFS), which determines the full-scale and
step-size current for the DAC. If RFS is calculated to be
outside its limits (40kΩ < RFS < 160kΩ), then the resistor
is forced to the edge of the limit and the DS4424 RFS edit
box turns red. The equations used to calculate the outputs
are given in Table 2.
Status Tab
The Status tab sheet (Figure 8) displays all the faults,
warning, and device ID information. To read all the output
values, faults, and warnings, press the Read Device 1
Status button or turn on polling with the Auto Polling
On button. The fault and warning bits are read from
STATUS_VOUT (7Ah), STATUS_IOUT (7Bh), STATUS_
MFR_SPECIFIC (80h), and STATUS_TEMPERATURE
(7Dh). The Polled values are read from READ_VOUT
(8Bh), READ_IOUT (8Ch), and READ_TEMPERATURE
(8Dh). Each color indicator turns green if the status is
good, red if there is a fault, or yellow to indicate a warning. The Polled value might not reflect the fault or warning
because some bits are latches and have to be cleared.
To clear the faults and warnings, press the Clear Faults
button in the status bar to send the CLEAR_FAULTS
(03h) command. The Time Count displays the 32-bit
counter read from the MFR_TIME_COUNT (DDh)
command. The ID COMMANDS table displays all the ID
information of the device. Press the Read ID button to
read all the commands in the table.
Data Log Graph Tab
The Data Log Graph tab sheet (Figure 9) plots the
polled values in a graph and keeps track of the minimum and maximum values for each channel voltage or
current and each temperature sensor. To read the polled
values, press the Data Log Read button. Each data log
Table 1. PWM Calculator
Evaluates: MAX34451
reads every channel’s voltage (READ_VOUT 8Bh) or
current (READ_IOUT 8Ch) and every temperature sensor (READ_TEMPERATURE 8Dh). The software finds
the minimum and maximum values over multiple reads.
To plot the value being read, press the Auto Polling On
button and the Poll Count displays the number of reads
that have been tracked in the data log. When the polled
count reaches 10,000, the graph deletes the oldest polled
values and adds a new polled value. The min/max values
are still based on all the poll-count values, but the graph
only displays the latest 10,000 polled values. To reset the
Poll Count and all the min/max values, select Data Log
Reset. To turn off data logging during polling, check the
Data Log Off checkbox. The Select Data drop-down list
is used to select the voltage, current, or temperature data
to display on the graph and in the MIN/MAX Data table.
To save all the data graphed to a CSV file, press the Save
Data Log button.
Fault Log Dashboard Tab
The Fault Log Dashboard tab sheet (Figure 10) displays all 15 NV fault logs in table format. When the tab is
selected, the Overwrite and Fault Log Depth are read.
When the fault log is full, the Enable Overwrite can be
checked to automatically overwrite previous logs. The
fault log depth can be adjusted with the Fault Log Depth
drop-down list. The Enable Overwrite and Fault Log
Depth are read from bits in MFR_NV_LOG_CONFIG
(D8h). To read all 15 fault logs, press the Read All Fault
Logs button. This command takes at least 10s to complete. For each channel within a fault log, the VOLTAGE/
CURRENT table shows the fault/warning status, minimum
value, maximum value, and the last three black box readings. The TEMPERATURE table shows the OT fault status, the peak value, and the last temperature reading. To
clear or force the fault log, press the Clear NV Fault Log
or Force NV Fault Log buttons, respectively. These buttons write to a bit in MFR_NV_LOG_CONFIG (D8h). The
Dump Logs to File button saves all the fault log tables
in a CSV file.
Table 2. DAC Calculator
OUTPUT EQUATIONS
OUTPUT EQUATIONS
IFB = (VOUT)/(R1 + R2)
IFB = (VOUT)/(R1 + R2)
R3 = (VFB - 0.3)/(IFB x Margining Range x 120%)
DS4424 RFS = (7.75)/(IFB x Margining Range x 120%)
PWM Level = 256 x (VFB/VDD)
DS4424 full scale = (0.976 x 127)/(16 x RFS)
DS4424 step size = Full scale/64
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 8. MAX34451 EV Kit GUI (Status Tab)
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MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 9. MAX34451 EV Kit GUI (Data Log Graph Tab)
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Maxim Integrated │ 16
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 10. MAX34451 EV Kit GUI (Fault Log Dashboard Tab)
www.maximintegrated.com
Maxim Integrated │ 17
MAX34451 Evaluation Kit
Fault Log Tab
Evaluates: MAX34451
The Pins tab sheet (Figure 12) shows all the pin names,
pin numbers, and pin descriptions. The Pin Name and
Description columns can be edited to specify how the
pin is configured. The pin names listed in the Pin Name
column are copied to the Pin Name columns on the
other tabs and are saved in the XML file when a project
is saved.
The current register configuration can be saved to main
flash by pressing the Save To Main Flash button, which
sends the STORE_DEFAULT_ALL (11h) command. The
configuration can also be saved to BACKUP flash by
pressing the Save To Back Up Flash button, which
reads/writes to the MFR_STORE_ALL (EEh) command.
To return the device to the configuration in MAIN flash,
press the Restore From Main Flash button, which sends
the RESTORE_DEFAULT_ALL (12h) command. The
device can also be returned to the configuration stored in
BACKUP flash by pressing the Restore From Back Up
Flash button to read/write to the MFR_RESTORE_ALL
(EFh) command. To reset the device, press the Soft
Reset button to write to a bit in MFR_MODE (D1h). The
Command Description shows the bitmap for selected
PMBus commands. Select the command in the dropdown list and the table below shows a description of each
bit for that command.
Registers Tab
Multiple Devices
The Fault Log tab sheet (Figure 11) displays a single log
in the NV fault log. To read the fault log, press the Read
NV Fault Log button and all 255 bytes from MFR_NV_
FAULT_LOG (DCh) are displayed in the table. The fault
log number is displayed above the Read NV Fault Log
button. To save the current fault log displayed in the table,
press the Dump to a File button and the table is saved
as a CSV file.
Pins Tab
The Registers tab sheet (Figure 13) displays all the
PMBus commands and their current data. To read the registers, select a page in the top drop-down list and all the
PMBus commands valid for that page are automatically
read. The commands not valid for that page are grayed
out. Press the Read All button to read the registers again.
To write to a command, enter the hex value in the cell and
click another cell or press Enter on the keyboard. The
CRC of all three memory arrays in the device can be read
by pressing the Read CRC of All Memory Arrays button,
which reads/writes to the MFR_CRC (FEh) command.
www.maximintegrated.com
The GUI has the ability to display data for up to four
devices. If multiple slave addresses are detected, the
Number of Devices option in the Connection menu
allows the user to choose how many devices to display. To
choose the order of devices, select the appropriate slave
address in the DeviceX Slave Address options. Most
tabs have separate tables and controls for each device.
The Fault Log Dashboard, Fault Log, and Register
tabs all have a drop-down list to select the device to read/
write if the number of devices is greater than one.
Maxim Integrated │ 18
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 11. MAX34451 EV Kit GUI (Fault Log Tab)
www.maximintegrated.com
Maxim Integrated │ 19
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 12. MAX34451 EV Kit GUI (Pins Tab)
www.maximintegrated.com
Maxim Integrated │ 20
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 13. MAX34451 EV Kit GUI (Registers Tab)
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Maxim Integrated │ 21
MAX34451 Evaluation Kit
Detailed Description of Hardware
User-Supplied I2C Interface
To communicate with the MAX34451 with a user-supplied
I2C interface, first remove J23 jumpers to disconnect the
USB I2C dongle. If the dongle is no longer desired, it can
be separated from the EV kit by snapping the PCB at the
scored line. Connect test points SDA, SCL, GND, and 5V
to the off-board I2C interface. The I2C interface should
operate at 3.3V.
User-Supplied Power Supplies
To disconnect the on-board power supplies, turn off
4-pole DIP switches RS (S5), PSEN (S6), and PWM (S7).
The power supplies’ GND should be connected to the
banana jack (GND). Connect the desired PSENn pins
to the enable pin on the power supply, and the RSn pins
to a voltage-divider on the output of the power supply.
The voltage-divider is only required if the output voltage
is greater than 1.8V. For PWM margining, the PWMn
outputs can be connected to the feedback of the power
supply for channels 0–7. Resistors R68–R75 should be
adjusted to match the power-supply feedback circuitry.
Refer to the MAX34451 IC data sheet for details or use
the PWM calculator to determine the proper values.
User-Supplied DS75LV
To use an off-board digital temperature sensor, connect
MSDA, MSCL, and GND on J3 to the DS75LV. The slave
address for the user-supplied DS75LV should be 92h, 94h,
or 96h. The on-board DS75LV has slave address 90h.
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Evaluates: MAX34451
Current-Sense Amplifier
The EV kit comes with an on-board 25V/V current-sense
amplifier (U3) to demonstrate how the device can monitor
current. The output of the amplifier is connected to RS15
and can be removed by removing the jumper on J15.
Multiple Device System
To chain multiple MAX34451 EV kits together as one
system, follow the steps below. Note: Do not chain more
than four EV kits together.
1) Remove power to all EV kits.
2) On one EV kit, populate the four jumpers on J23. For
all other boards, remove the four jumpers on J23.
3) For all EV kits, switch the SDA and SCL signals on the
8-pole DIP switch (S4) to on.
4) If using the other signals on the 8-pole DIP, then
switch those signals to on; otherwise, turn the switches
off. Note: To connect the SEQ, FAULT1, or FAULT2
signals, jumpers J4, J6, or J5 must also be set to SEQ,
FAULT1, or FAULT2, respectively.
5) Connect the EV kit signals together using ribbon-cable
connectors on J7 or J8. To power and communicate to
another EV kit, ensure that 5V, GND, SDA, and SCL are
all connected on J7 or J8. All other signals are optional.
6) Connect the EV kit with the four jumpers on J23 to a
PC using the USB cable.
Maxim Integrated │ 22
MAX34451 Evaluation Kit
Evaluates: MAX34451
Table 3. Description of LEDs
LED
COLOR
D2
Red
FAULT0: A fault has occurred.
DESCRIPTION
D3
Red
FAULT1: A fault has occurred.
D4
Red
FAULT2: A fault has occurred.
ALERT: A fault or warning has occurred.
D7
Red
DA
Green
VOUT0: Channel 0 is on.
DB
Green
VOUT1: Channel 1 is on.
DC
Green
VOUT2: Channel 2 is on.
DD
Green
VOUT3: Channel 3 is on.
Red
D20 (Power)
Green
Red
D21(Com)
Green
USB Power Fault: A fault occurred due to overvoltage limit, current limit, or thermal limit.
USB Power: USB power supply is on.
Communication: After the software has initialized the hardware, the LED flashes red
when an I2C command is received.
Initialized: Hardware has been initialized by software.
Table 4. Description of Switches
SWITCH
SWITCH POSITION
DESCRIPTION
S1
On*
CONTROL0: Pulls the CONTROL0 pin high.
S2
On*
CONTROL1: Pulls the CONTROL1 pin high.
S3
Pressed
S4
On*
Multiple Devices: Connects all the multiple device signals to headers J7 and J8.
S5
On*
RS0–RS3: Connects RSn of the device to the output of the power-supply channel.
S6
On*
PSEN0–PSEN3: Connects PSENn of the device to the enable pin of the power-supply channel.
S7
On*
PWM0–PWM3: Connects PWMn of the device to the feedback of the power-supply channel.
Reset: Pulls the RST pin low to reset the device.
*Default position.
Table 5. Description of Jumpers
JUMPER
JUMPER POSITION
J1
VDD-VDUT
J4
J5
J6
J15
J23
PSEN11*
SEQ
PSEN10*
DESCRIPTION
Connects VDD to VDUT (U1).
Connects the PSEN11/GPO11/SEQ pin to the PSEN header.
Connects the PSEN11/GPO11/SEQ pin to a pullup resistor and SEQ test point.
Connects the PSEN10/GPO10/FAULT2 pin to the PSEN header.
FAULT2
Connects the PSEN10/GPO10/FAULT2 pin to a pullup resistor, LED, and FAULT2 test point.
PWM7*
Connects the PWM7/GPO19/FAULT1 pin to the PWM header.
FAULT1
Connects the PWM7/GPO19/FAULT1 pin to a pullup resistor, LED, and FAULT1 test point.
CSA
Connects the current sense amplifier (U3) output to RS15.
5V-5V
Supplies 5V from the USB I2C dongle to the EV kit board.
SDA-SDA
Connects SDA from the USB I2C dongle to the U1 device SDA.
GND-GND
Connects GND from the USB I2C dongle to the EV kit board GND.
SCL-SCL
Connects SCL from the USB I2C dongle to the U1 device SCL.
*Default position.
www.maximintegrated.com
Maxim Integrated │ 23
MAX34451 Evaluation Kit
Evaluates: MAX34451
Troubleshooting
All efforts have been made to ensure that each kit works
on the first try, right out of the box. In the rare occasion
that a problem is suspected, see Table 6 to help troubleshoot the issue.
Table 6. Troubleshooting
SYMPTOM
CHECK
SOLUTION
Is the LED labeled D20 red?
If yes, then the electronic fuse is in a fault state. Inspect for electrical
shorts on the PCB and make sure that the PCB is not sitting on a
conductive surface.
Does the LED labeled D21
turn green when the GUI is
running?
If not, then exit the GUI and try running it again. If D20 still does not
turn green, then exit the GUI and try connecting the USB cable to a
different USB port on the PC and wait for a Windows message that
states the hardware is ready to use. Run the GUI again.
Are any of the LEDs
illuminated?
If not, then the PCB may not be getting power from the USB. Try a
different USB cable or a different USB port.
Jumper J1
Make sure jumper J1 is installed to power the U1 device.
Jumper J23
Make sure four jumpers on J23 are installed.
Is there a CONTROL# fault
on the Status tab of the
GUI?
If the ON_OFF_CONFIG command is set as turn-on power supplies
with the CONTROL0/CONTROL1 pin, then make sure S1 and S2 are
in on position.
Is the ALERT LED on and all
channel LEDs off?
If so, make sure switch PSEN (S6) is in the on position to connect the
PSENs of U1 device to channel power supplies.
Is the ALERT LED on and at
least one channel LED on?
If so, make sure switch RS (S5) is in the on position to connect the
power-supply outputs to the U1 device.
Margining is not working,
voltage is not changing
S7
Make sure the PWM (S7) switch is in the on position to connect the
PWMs of the U1 device to the FB of channels 0–3.
Chaining multiple EV kits
together using J7 and J8
does not seem to work
S4
Make sure that all the switches on the 8-pole DIP switch (S4) are in
the on position.
The FAULT1 LED does
not turn on.
J6
If the channel is configured to assert the FAULT1 pin, make sure the
Output Select for PWM7 on the PWM/GPO tab is set to FAULT1. On
the EV kit, make sure the J6 jumper is set to FAULT1.
The FAULT2 LED does
not turn on.
J5
If the channel is configured to assert the FAULT2 pin, make sure the
Output Select for PSEN10 on the PSEN/GPO tab is set to FAULT2.
On the EV kit, make sure the J5 jumper is set to FAULT2.
The SEQ input/output
signal is not working
J4
If the channel is configured to generate or match a SEQ signal, make
sure the Output Select for PSEN11 on the PSEN/GPO tab is set to
SEQ. On the EV kit, make sure the J4 jumper is set to SEQ.
The current monitored on
RS15 does not work
J15
Make sure the jumper on J15 is populated to connect the output of the
current-sense amplifier to RS15.
GUI says hardware not
found.
No slave address found
and read/writes fail
Channels do not turn on
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Maxim Integrated │ 24
3.3V
VDD
4.7k
R 100
GND
SDA
SCL
1
SW- SPDT
3 S1
2
TP 17
FAUL T0
GND
R102
0
VDD
5
4
3
TP 19
R108
2
RS15'
S3
0
0
DNP
GND
SDA
TP 23
TP 21
0.1uF
C07
3
2
1
CON3
J4
GND
5V
GND
10uF
C160
5V
1
2
3
4
RS4
RS3
RS2
RS1
RS0
GND
TP 18
C161
TP 20
330
R113
VL ED
D4
RED.
R112
VDD
3
2
1
FAUL T2
CON3
J5
0.1uF
C03
C05
GND
J3
4.7k 4.7k
R130 R131
3.3V
PSEN10
3.3V
0.01uF
0.01uF 1uF
C04
500 mohm max ESR from REG18 to GND
SEQ
8
7
6
5
RS4/GP I4
RS3/GP I3
RS2/GP I2
RS1/GP I1
RS0/GP I0
CONTROL 1
VDDA
NC
VSS
FAUL T0
CONTROL 0
RST
PSEN11/GP O11/SEQ
RS15/GP I15
OUT
BYP
FB
POK
MAX8902B
IN
GND
EN
GS
10uF
R161
10k
C162
TP 43
45.3k
R160
3.3V
2
D1
DNP
1
R162
GND
1
2
3
4
DS75
SDA
SCL
O.S.
GND
U2
VCC
A0
A1
A2
8
7
6
5
PSEN4/GP O4
PSEN3/GP O3
PSEN2/GP O2
PSEN1/GP O1
PSEN0/GP O0
NC
RSG1
NC
RSG0
PWM7/GP O19/FAUL T1
PWM6/GP O18
ADDR
AL ERT
PWM5/GP O17
R135
100k
R133
100k
GND
R134
DNP
3.3V
PWM5
AL ERT
PWM6
ADDR
RSG0
RSG1
PSEN4
PSEN3
PSEN2
PSEN1
PSEN0
U1
MAX34451
R132
DNP
42
41
40
39
38
37
36
35
34
33
32
31
30
29
C163
TP 1
J1
VDUT
VDD- VDUT
VDD
0.1uF
C10
DNP 470uF ALUM
+
VDD
2
1
U4
1
2
3
4
5
6
CONT ROL 1
VDUT 7
8
9
FAUL T 0 10
CONTROL 0 11
RST 12
13
RS15
14
R110
VDD
FAUL T2
SEQ
PSEN11
TP 15
CONTROL 1
TP 44
R111
10k
100 mohm max ESR
C06
SCL
GND
VDD
GND
0.1uF
C09
0.1uF
C02
SW- SPDT
R109
100k
1
3 S2
0.1
R165
SW- PB
R107
R105 R106
2.2k 2.2k
VDD
GND
0.1uF
C08
CONTROL 0
D2
RED
330
R104
VL ED
I2C DONGL E
1
2
3
4
J2
GND
RS+
RSOUT
MAX9938TEUK +
GND
GND
U3
R103
VDD
2
1
100k
100k
R 101
57
Header5V
2
1
2
D5
100k
100k
1
PW M 0
PW M 1
PW M 2
PW M 3
PW M 4
E P/V SS
R S5
R S6
R S7
R S8
R S9
R S10
R S11
R S12
PSE N9
R S13
PSE N8
PSE N7
PSE N6
PSE N5
56
55
54
53
52
51
50
49
48
47
46
45
44
43
R S5/GPI 5
R S6/GPI 6
R S7/GPI 7
R S8/GPI 8
R S9/GPI 9
R S10/GPI 10
R S11/GPI 11
R S12/GPI 12
PSE N9/GPO9
R S13/GPI 13
PSE N8/GPO8
PSE N7/GPO7
PSE N6/GPO6
PSE N5/GPO5
SDA
SC L
V DD
R E G 18
PSE N10/GPO10/FA UL T 2
R S14/GPI 14
M SC L
M SDA
NC
PW M 0/GPO12
PW M 1/GPO13
PW M 2/GPO14
PW M 3/GPO15
PW M 4/GPO16
15
16
V DUT 17
R E G 18 18
19
R S14 20
M SC L 21
M SDA 22
23
24
25
26
27
28
1
2
3
1uF
C01
PWM7
FAUL T1
5V
FAUL T1
TP 25
AL ERT
TP 22
R123
GND
R118 TP 24
DNP
ADDR
R119
0
VDD
D7
RED.
330
R124
C164
D3
RED.
330
R115
VL ED
R117
DNP
C11
DNP
VDD
R116
DNP
R114
VDD
GND
8
7
6
5
VL ED
OUT
BYP
FB
POK
MAX8902B
IN
GND
EN
GS
U5
CON3
1
2
3
J6
1
2
3
4
M SC L
100k
M SDA
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100k
Dongle5V
10k
R164
45.3k
R163
SW DIP-8
S4
10uF
C165
16
15
14
SEQ
13
FAUL T 0
12
FAUL T 1
11
FAUL T 2
CONTROL 010
CONTROL 1 9
SDA
SCL
VL ED
0.01uF
1
1
2
3
4
5
6
7
8
2
4
6
8
10
2
4
6
8
10
1
3
5
7
9
1
3
5
7
9
HDR_10P IN
J7
HDR_10P IN
J8
GND
Header5V
GND
GND GND GND GND GND GND GND GND
BL ACK BANANA JACK
B1
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 14a. MAX34451 EV Kit Schematic (Sheet 1 of 3)
Maxim Integrated │ 25
100k
R0C
PSEN2'
100k
R0D
PSEN3'
TP 39
PSEN3
10uF
C0D
5V
100k
R0B
PSEN1'
TP 35
PSEN2
10uF
C0C
5V
100k
TP 31
PSEN1
10uF
C0B
5V
10uF
1
2
3
4
1
2
3
4
1
2
3
4
OUT
BYP
FB
POK
OUT
BYP
FB
POK
OUT
BYP
FB
POK
MAX8902B
IN
GND
EN
GS
U1D
MAX8902B
IN
GND
EN
GS
U1C
MAX8902B
IN
GND
EN
GS
U1B
MAX8902B
GND
8
7
6
5
GND
8
7
6
5
GND
8
7
6
5
GND
FB3
TP 42
C1D
VOUT3
FB2
TP 38
C1C
VOUT2
FB1
TP 34
C1B
VOUT1
FB3
0.01uF
FB2
0.01uF
FB1
0.01uF
FB0 TP 30
FB0
10uF
10uF
3.09k
DD
L ED
10uF
1k
R5D
267
R2D
R4D
1k
R5C
R3D
C2D
TP 40
VOUT3
DC
L ED
8.66k 49.9
R1D
3.09k
R2C
267
8.66k 49.9
1k
R5B
R4C
C2C
TP 36
VOUT2
10uF
R3C
R1C
3.09K
DB
L ED
267
R2B
R4B
1k
R5A
R3B
C2B
TP 32
VOUT1
DA
L ED
8.66k 49.9
R1B
3.09k
R2A
267
C2A
8.66k 49.9
RS3'
RS2'
RS1'
RS0'
TP 41
RS3
TP 37
RS2
TP 33
RS1
TP 29
RS0
RS0
RS1
RS2
RS3
RS4
RS5
RS6
RS7
RS8
RS9
RS10
RS11
RS12
RS13
RS14
RS15
R 20
DNP
0.01uF
C 20
DNP
C1A
R 21
OUT
BYP
FB
POK
PSEN0
PSEN1
PSEN2
PSEN3
PSEN4
PSEN5
PSEN6
PSEN7
PSEN8
PSEN9
PSEN10
PSEN11
R 22
DNP
IN
GND
EN
GS
C 21
DNP
DNP
PSEN0'
C 22
R0A
R 23
DNP
C0A
C 23
DNP
DNP
R4A
C60
R 24
DNP
R3A
C61 C62 C63 C64 C65 C66 C67
GND
GND
VDD
100 mil header testpoints
DNP J14
1
2
3
4
5
6
7
8
9
10
11
12
J13 DNP
GND
1
2
3
4
5
6
7
8
J9
DNP
100 mil header testpoints
C 30
DNP
R1A
R 31
DNP
8
7
6
5
C 31
1
2
3
4
C 24
R68
R69
R70
R71
R72
R73
R74
R75
8
7
6
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
7
6
5
1
2
3
4
4-POL E DIP SW
S6
C 32
DNP
10k
10k
10k
10k
10k
10k
10k
10k
R 32
DNP
DNP
R60
R61
R62
R63
R64
R65
R66
R67
R 25
DNP
DNP
0.01uF
C 25
0.01uF
R 26
DNP
DNP
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
4.7k
C 26
DNP
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
R 33
TP 28
VOUT0
C 33
DNP
DNP
VOUT0
R 34
DNP
U1A
1
2
3
4
PSEN0'
PSEN1'
PSEN2'
PSEN3'
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
J10 DNP
FB0
FB1
FB2
FB3
RS15'
GND
1
2
3
4
4-POL E DIP SW
S5
L ocated with RSx testpoints.
J12
0
R16
1
0
R17
2
DNP
RSG0
RSG1
8
7
6
5
J15
1
2
CON2
J11 DNP
100 mil header testpoints
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
4-POL E DIP SW
S7
DNP C 35
TP 27
PSEN0
C 34
DNP
5V
R 35
DNP
0.01uF
R 27
0.01uF
C 27
R 40
R 41
R 42
R 43
R 44
R 45
R 46
R 47
R 48
R 49
R 50
R 51
C 28
DNP
0.01uF
R 29
DNP
0.01uF
C 29
DNP
0.01uF
R 30
DNP
0.01uF
R 28
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
R 36
0
DNP
R 80
R 81
R 82
R 83
R 84
R 85
R 86
R 87
R 88
R 89
R 90
R 91
R 37
0
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100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
RS0'
RS1'
RS2'
RS3'
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 14b. MAX34451 EV Kit Schematic (Sheet 2 of 3)
Maxim Integrated │ 26
MAXIM
MAXI M_L ogo
*
2
1
OUT
VCC
J21
2
1
DNP
DD+
GND'
DNP
C215
4.7k
R214
0
COM
1
VP P
HB
COM
D22
R213
2.2k
1
2
3
4
5
6
7
8
9
10
11
12
13
14
GND'
D20B
560
R205
5V
PICfor DS3900
MCL R
P3,HB
COM_L ED,BOOT
P1
P2
RCV
P6, CS
GND
OSC1
OSC2
P4
UOE
PS_VAR
VUSB
U20
G reen
OUT
BYP
FB
POK
MAX8902B
IN
GND
EN
GS
U22
P8,1W_P U
P7,1W_DQ
P5
USB_DET
VP O
VMO
P10,SCK ,SCL
P11,SDI ,SDA
VDD
GND
P9,SDO
ENUM
D+,VP
D-,VM
1
2
3
4
28
27
26
25
24
23
22
21
20
19
18
17
16
15
8
7
6
5
D+
D-
SCL '
SDA'
C203
0.01uF
3.3V'
USB to I2C Programming Board
220nF
C213
5V'
10uF
C202
OSC1
3.3V'
R212
330
D21B
R204
100k
1
2
3
GND'
R211
330
D21A
3.3V'
MAX4995A
FL AG OUT
IN
GND
ON
SETI
U21
C214 0.01uF
3 CL K
3.3V'
4
GND'
6
5
4
R210
C201
10uF
OSC_CMOS_4pin
GND
INH
X1
J20
1 VBUS
Vbus
2 0 R201
D3 0 R202
D+
4
I.D.
5
GND
USB_5P IN
R ed
D20A
R ed
560
G reen
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2
R203
10k
DNP
1uF
GND'
0.1uF
C212
3.3V'
R216
DNP
R215
3.3V'
10uF
C204
C211
R207
45.3k
R206
3.3V
1
2
3
4
5V'
I2C DONGL E
J22
1
3
5
7
2
4
6
8
SDA
SCL
GND
Dongle5V
2x4 Header is the only connection between
programming board and MAX34451 EV Kit.
J23
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 14c. MAX34451 EV Kit Schematic (Sheet 3 of 3)
Maxim Integrated │ 27
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 15. MAX34451 EV Kit PCB Layout—Top Layer
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Maxim Integrated │ 28
MAX34451 Evaluation Kit
Evaluates: MAX34451
Figure 16. MAX34451 EV Kit PCB Layout—Bottom Layer
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Maxim Integrated │ 29
MAX34451 Evaluation Kit
Evaluates: MAX34451
Ordering Information
PART
TYPE
MAX34451EVKIT#
EV Kit
#Denotes an RoHS-compliant device that may include
lead(Pb), which is exempt under the RoHS requirements
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Maxim Integrated │ 30
MAX34451 Evaluation Kit
Evaluates: MAX34451
Revision History
REVISION
NUMBER
REVISION
DATE
0
5/13
DESCRIPTION
Initial release
PAGES
CHANGED
—
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2013 Maxim Integrated Products, Inc. │ 31