REV. 0

–4–

EVAL-ADM1070EB

EVALUATION BOARD

J8

J9

0V

–48V

BACKPLANE

BOARD

LOAD BOARD

HOT SWAP

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

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

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.

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.

P1–1

P1–2

P1–3

P1–4

P1–5

P1–6

P1–7

P1–8

P1–9

P1–10

P1–11

P1–12

1

2

1

2

3

4

C1

+

LK1

LK2

R1

R2

R3

R4

A

B

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

P1–9

P1–10

P1–11

P1–12

BANANA

BANANA

J1

J2

Figure 6. Schematic Diagram of Possible Backplane Board