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EVAL-ADM1070EB

ADM1070 Hot Swap Controller Evaluation Kit Documentation

Analog Devices 

EVAL-ADM1070EB

EXAMPLE

The user wants to simulate a live insertion event with the

ADM1070 Evaluation Board. The user’s application operates

with a –48 V supply voltage. The plug-in board load can be

represented by a capacitive load of 100 µF. The ADM1070 will

be mounted on the backplane.

Set Up:

1. Resistor values of R1 = 39 kΩ and R2 = 1 kΩ should be used

for a –48 V supply (see Table IV, page 11, ADM1070 data

sheet). Default resistor ratio used.

2. User’s maximum load current = 1.4 A. An RSENSE of

47 mΩ gives maximum load current = 1.3 A (see Table I,

ADM1070 data sheet). Default value used.

3. Default timing values can be used. Switch 2 placed in

Position A.

The Evaluation Board should be set up as described in the Residing

On a Backplane section. A 100 µF load should set up (Default

Capacitor C4 = 100 µF load). To generate the wave forms below

on an oscilloscope, the following test points should be monitored.

GATE Waveform: Connect an oscilloscope probe between T7

(GATE) and T5 (–48 V).

SENSE Waveform: Connect an oscilloscope probe between

T8 (SENSE) and T10 (–48 V).

VOUT Waveform: Connect an oscilloscope between T11 (0 V)

and T12 (–48 V OUT).

The oscilloscope should be set to trigger on the rising edge of the

GATE voltage. A live insertion event can be modeled by inserting

the load board into the Evaluation Board Connector J9. Great

care should be taken when handling and connecting live boards.

GATE

T

SENSE

T

VOUT

CH1 5.00V

CH3 10.0V

CH2 100mV

M 500␮s

CH1 2.8V

Figure 10. Live Insertion Waveforms

–6–

REV. 0

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