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make sure that the scope ground leads are very

short. You may use a close by ground pad for

the scope probe return, such as C1, C2, C3 and

C4 Rtn pads.

4.5. Apply a short at one of the inputs (Vin1 or Vin2)

when both controllers (U1 and U2) are on, PS1

and PS2 are enabled. The short can be applied

electronically

using

a

MOSFET

connected

between Vin and Rtn or simply by connecting Vin

to Rtn.

Then measure the response time

between when the short being applied and the

MOSFET being disconnected (or turned off). An

example for PI2007 response time to an input

short circuit is shown in Figure 4.

Figure 4: Plot of PI2007 response time to reverse current detection

Test Setup:

DUT: PI2007-EVAL2

Vin1 = 12V

Vin2 = 12V

Output Load = 6A

Test:

Both

input

sources

are

turned on and sharing the

load current, then applied a

short for 1ms with fast turn

on 1mΩ MOSFET between

Vin1 and Rtn.

Test purpose:

To show the PI2007 response

to a fault condition, where

the output of the input

source is shorted or tried to

source current from the load

(Vout)