MAX5952AEVKIT Maxim Integrated, MAX5952AEVKIT Datasheet - Page 6

• Manufacturer Part Number: MAX5952AEVKIT
• Description: Power Management IC Development Tools Evaluation Kit/Evaluation System for the MAX5952A
• Manufacturer: Maxim Integrated
• Series: MAX5952r

Specifications of MAX5952AEVKIT

• Product: Controllers & Switches

MAX5952A Evaluation Kit/Evaluation System
14) Connect the USB cable from the PC to the
15) Follow the directions of the Add New Hardware
16) Start the MAX5952A EV kit software by opening its
17) Observe as the program automatically detects the
18) Select the BitMap Controls tab at the top.
19) Load and run the Power_on.smb macro program
20) All four network port green status LEDs should be lit.
21) Four other example macros allow quick testing of
Read the embedded comments in each macro for
detailed descriptions using a plain text editor.
22) Pressing pushbutton switches S1 through S4 shuts
23) Test points VEE (U1 VEE pin) and GND test points
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CMAXQUSB interface board. A Building Driver
Database window should pop up in addition to a New
Hardware Found message if this is the first time the
EV kit board is connected to the PC. If you do not see
a window that is similar to the one described above
after 30s, try removing the USB cable from the CMAX-
QUSB and reconnect it. Administrator privileges are
required to install the USB device driver on Windows
2000 and XP. Refer to the document TROU-
BLESHOOTING_USB.PDF included with the software
if you have any problems during this step.
Wizard to install the USB device driver. Choose the
Search for the best driver for your device option.
Specify the location of the device driver to be
C:\Program Files\MAX5952A (default installation
directory) using the Browse button.
icon in the Start | Programs menu.
CMAXQUSB interface board, starts the main pro-
gram, and then automatically detects the I
pliant address configured for the MAX5952A.
from the File | Open | Run Macro menu. The script
automatically runs after selecting Open.
the manual mode, auto mode, semiauto mode, and
with DC and/or AC load-disconnect detection.
These macros are:
• test#1_manual_mode.smb
• test#2_auto_mode_dc.smb
• test#3_auto_mode_ac.smb
• test#4_semiauto_mode.smb
down the PORT1_OUT through PORT4_OUT
respective DC power.
are provided throughout the printed-circuit board
(PCB) to observe desired signals with an oscillo-
scope or voltage meter. Use an isolated oscillo-
scope for probing with respect to VEE.
_______________________________________________________________________________________
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C-com-
24) Header J2 is provided to monitor the SHDN pin sig-
25) Pressing the RESET pushbutton turns off power to
Note: The GND banana jack is more positive than the
VEE banana jack. Use an isolated oscilloscope for
probing with respect to VEE.
Note: An uninstall program is included with the soft-
ware. Click on the UNINSTALL icon to remove the EV
kit software from the hard drive.
The MAX5952A EV kit features a 10/100BASE-TX Ethernet
four-port PSE controller circuit for -48V supply rail systems.
The EV kit’s PSE circuit uses the IEEE 802.3af and pre-
802.3at-compliant MAX5952A network power controller,
four n-channel power MOSFETs in 8-pin SO surface-
mount packages, eight surface-mount current-sensing
resistors, and four 10/100BASE-TX voice-over-IP magnetic
modules (integrated in J3) to form the basic portion of a
PSE circuit. The MAX5952A EV kit has been designed as
an IEEE 802.3af and pre-802.3at-compliant PSE and
demonstrates all the required functions such as PD dis-
covery, classification, current-limit control of a connected
PD at each Ethernet output port, and DC/AC disconnect
detection. The EV kit also has a separate on-board
100Hz sine-wave oscillator circuit for the AC-disconnect
detection features. An IBM-compatible PC can be used
to communicate with the slave MAX5952A over an I
compliant 3-wire interface, optically coupled logic, and a
2-wire to USB-port CMAXQUSB interface board.
The MAX5952A EV kit PSE circuit requires a -32V to
-60V power supply (-48V supply rail) capable of supplying
4A to the EV kit’s GND and VEE steel banana jacks or PCB
pads. A separate +3.3V power supply capable of supply-
ing 100mA is also required for the MAX5952A optically iso-
lated I
interface board is not used. Note that DGND and GND are
shorted by a PCB trace between the pads of resistor R72.
The MAX5952A controls the -48V DC power to each of
the four 10/100BASE-TX Ethernet output ports by regulat-
ing the respective port’s n-channel power MOSFET and
sensing current through the respective port’s current-
sense resistors. The current is fed to the 10/100BASE-TX
voice-over-IP magnetic module connected to the respec-
tive Ethernet output port’s RJ-45 jack. An IEEE 802.3af
and pre-802.3at-compliant PD connects to the respective
Ethernet output port (J3 upper ports) on the EV kit. The
nals. These signals are not isolated and are refer-
enced to DGND. DGND and GND are shorted by a
PCB trace between the pads of resistor R72.
all ports and returns the MAX5952A IC to the
power-up condition.
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C-compliant 3-wire interface if a CMAXQUSB
Detailed Description
of Hardware
2
C-