EVAL-ADM1073MEB Analog Devices Inc, EVAL-ADM1073MEB Datasheet - Page 8

• Manufacturer Part Number: EVAL-ADM1073MEB
• Description: BOARD EVAL MICRO FOR ADM1073
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADM1073MEB

• Main Purpose: Power Management, Hot Swap Controller
• Utilized Ic / Part: ADM1073
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

EVAL-ADM1073EB
OPERATING THE MAIN EVALUATION BOARD
Many tests and hot swap scenarios can be modeled on the
EVAL-ADM1073EB main evaluation board:
•
•
•
•
•
•
•
•
•
•
All tests involving shorts can be simulated with the ADM1073
residing on either the plug-in module/board side or the back-
plane side. The main evaluation board can be configured to
recreate the two ways in which the ADM1073 can be used in a
real system.
ADM1073 RESIDING ON A PLUG-IN BOARD
Typically, the ADM1073 and its accompanying components are
mounted on a plug-in board. This board is then slotted into the
live backplane, when required. When the power lines connect,
the ADM1073 powers up. If the supply is stable and within
tolerance, it turns the FET on in a controlled manner, applying
power safely to the load and powering up the rest of the board.
LOGIC
–48V
0V
Powering up into a load (resistive, capacitive, RC
combination); successful hot swap
Powering up, then applying a load (resistive, capacitive, RC
combination); successful hot swap
Powering up into a shorted output
Powering up, then shorting the output
Permanent overcurrent fault
Temporary overcurrent fault
Temporary overcurrent fault followed by a permanent
overcurrent fault
Three distinct levels of overcurrent fault (see the ADM1073
data sheet)
Overvoltage condition
Undervoltage condition
R3
R4
Figure 2. ADM1073 Residing on a Plug-In Module
LOGIC I/Os
R
R1
R2
TIMER
C
TIMER
PLUG-IN BOARD
C
5
SS
R
ADM1073
SENSE
R
DROP
FET
LOAD
Rev. 0 | Page 8 of 20
To evaluate the ADM1073 residing on a plug-in board, set up
the evaluation board as follows:
1.
2.
3.
•
•
•
•
the load to the board in several ways:
Apply power to the board via leads connected directly to a
power supply. Power is normally applied through the black
and blue banana connectors (J1 to J4). Connect the higher
potential (RTN or 0 V) to Socket J1 (black). Connect the
lower potential of the supply to J2 or J3 (blue). A diode
OR’ing scheme is employed at these terminals, so that two
supplies can be applied simultaneously, if required. In this
situation, the supply with the higher potential is used. If
this supply potential drops below the voltage of the second
redundant supply, then the board switches over to the
second supply. To bypass the diodes, connect a single
power supply to the board via Socket J2 (blue).
To recreate a live insertion event, either turn on the power
supply or make the connection to the live supply. Take the
proper safety precautions when applying live voltages to
the evaluation board.
Set up the board with the preferred load. You can connect
BACKPLANE
–48V
Figure 3. Evaluation Board Simulating the Setup in Figure 1
If a single load component is sufficient, you can solder
the component directly onto the evaluation board in the
C4 position.
You can custom-build a board to simulate a plug-in
module’s load and plug it into Edge Connector J9. (See
Figure 8 for a schematic of the J9 pin diagram.)
Connect a load via Connectors J6 and J10.
If a no-load condition is required, do not connect
anything to J6, J9, or J10, and do not solder any
additional load components to the evaluation board.
0V
BOARD
HOT SWAP
J8
EVALUATION
BOARD
J9
BOARD
LOAD