ADM1070EB Ver la hoja de datos (PDF) - Analog Devices
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ADM1070EB Datasheet PDF : 12 Pages
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EVAL-ADM1070EB
BACKPLANE
BOARD
J8
0V
–48V
EVALUATION BOARD
HOT SWAP
J9
LOAD BOARD
LOAD BOARD
A schematic diagram of a possible load board that emulates the
load on a plug-in module and connects to Connector J9 is
shown below. This board contains a series resistance and
capacitance connected in parallel. A set of jumpers changes the
manner in which the components are applied: resistor only,
capacitor only, RC in parallel, or short circuit.
The board should be set up via the jumpers before power is
applied. For example, to set up the load board to emulate an
RC load, shorting links should be placed into both LK1 A and
B jumpers and LK2 should be left open.
Figure 4. The ADM1070 Evaluation Board
Simulating the Setup in Figure 3
Note that the ADM1070 can be employed on BOTH the plug-
in board/module and the backplane sides of a system. This will
provide the system with double protection.
SIGNAL MONITORING
When the Evaluation Board is under testing, many different
signals can be monitored. There are 12 test points on the board
(T1–T12).
T1: 0 V Input (and Output) Line
T2: Voltage at ADM1070 UV/OV Pin
T3: Voltage at ADM1070 TIMER Pin
T4: –48 V Input Line
T5: –48 V Input Line
T6: Voltage at ADM1070 VIN Pin
T7: Voltage at ADM1070 GATE Pin
T8: Voltage at ADM1070 SENSE Pin
T9: Voltage at Source Terminal of MOSFET (normally fed into
ADM1070 SENSE pin). Voltage between this node and
VEE is the voltage across RSENSE, which is used for current
sensing.
T10: –48 V Input Line
T11: 0 V Input (and Output) Line
T12: Voltage at MOSFET Drain Terminal. Lower potential of
output load voltage.
P1–1
P1–2
P1–3
P1–4
P1–5
P1–6
P1–7
P1–8
2
LK2
1
R1
R2
R3
42
B A LK1
31
R4
C1
+
P1–9
P1–10
P1–11
P1–12
Figure 5. Schematic Diagram of Possible Load Board
BACKPLANE BOARD
The user can also employ a Backplane Board that emulates the
backplane side of a user’s system. This board provides an alter-
native way of applying power to the ADM1070 Evaluation Board
(instead of power connectors J1–J4 of Evaluation Board).
The Backplane Board should be inserted into edge Connector
J8 of the ADM1070 Evaluation Board to apply power to the board.
This may be useful when simulating live insertion and removal
events with the ADM1070 Evaluation Kit, especially when simu-
lating a situation where the ADM1070 resides on a plug-in module.
A live insertion event can be recreated by plugging the Backplane
Board (with a live supply) into the ADM1070 Evaluation Board
(into Connector J8).
P1–1
P1–2
P1–3
P1–4
P1–5
P1–6
P1–7
P1–8
BANANA
J1
P1–9
P1–10
P1–11
P1–12
BANANA
J2
Figure 6. Schematic Diagram of Possible Backplane Board
–4–
REV. 0
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