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Picor Corporation • picorpower.com

PI2127

Rev 1.3

Figure 19: Plot of PI2127 response time to reverse current detection

Application Information

The PI2127 is designed to replace high side ORing

diodes in high current, medium voltage redundant

power architectures.

Replacing a traditional diode

with a PI2127 will result in significant power

dissipation reduction as well as board space

reduction, efficiency improvement and additional

protection features.

This section describes in detail the procedure to follow

when designing with the PI2127 Active ORing

solution.

Control Circuitry Bias:

The PI2127 control circuitry and the gate driver for the

internal MOSFET are biased through the S pin. An

11.7V typically.

Minimize the resistor value for low S voltage levels to

required.

mA

I

V

V

R

VC

PGMax

S

S

PG

1

.

0

max

min

+

−

=

−

−

PG

PGMin

S

S

RPG

R

V

V

Pd

2

max

)

(

−

−

−

=

Where:

min

−

S

V

:

S pin minimum applied voltage

max

−

S

V

:

S pin maximum applied voltage

PGMax

S

V

−

: Controller maximum clamp voltage, 12.5V