Vicor PI2007-EVAL2 12V/15A High Side Active ORing Evaluation Board - Manual (Page 7)

Picor Corporation • picorpower.com PI2007-EVAL2 User Guide Rev. 1.1 Page 7 of 9
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)