Vicor PI2001-EVAL1 Active ORing Evaluation Board - Manual (Page 2)

Picor Corporation • www.picorpower.com P12001-EVAL1 User Guide Rev 1.1 Page 2 of 11
The Cool-ORing PI2001 with an external industry standard
N-channel MOSFET provides a complete Active ORing
solution designed for use in redundant power system
architectures. The PI2001 controller with N-channel MOSFET
enables extremely low power loss with fast dynamic response
to fault conditions, critical for high availability systems. A
master / slave feature allows the paralleling of PI2001
solutions for high current Active ORing requirements. The
PI2001 can also drive multiple paralleled MOSFETs.
The PI2001 controller with a low Rds(on) N-channel MOSFET
provides very high efficiency and low power loss during
steady state operation. The PI2001 controller provides an
active low fault flag output to the system during excessive
forward current, light load, reverse current, over-voltage,
under-voltage, and over-temperature fault conditions.
A temperature sensing function indicates a fault if the
maximum junction temperature exceeds 160°C. The under-
voltage and over-voltage thresholds are programmable via
an external resistor divider.
Figure 1 shows a photo of the PI2001-EVAL1 evaluation
board, with two PI2001 controllers and two N-channel
MOSFETs used to form the two Active ORing channels. The
board is built with two identical Active ORing circuits with
options and features that enable the user to fully explore the
capabilities of the PI2001 universal Active ORing controller.
Figure 1 – PI2001-EVAL1 Evaluation Board (1.8" x 1.8")
Terminals Rating
Vin1, Vin2 8V / 24 A
Vaux1, Vaux2, (R2 = R4 = 10 Ω ) -0.3 V to 17.3 V / 40 mA
SL1, SL2 -0.3 V to 8.0 V / 10 mA
FT1, FT2 -0.3 V to 17.3 V / 10 mA
Terminal Description
Vin1 Power Source Input #1 or bus input designed to accommodate up to 20 A continuous current.
Vaux1 Auxiliary Input Voltage #1 to supply PI2001 VC power. Vaux1 should be equal to Vin1 plus 5 V or higher.
See details in Auxiliary Power Supply (Vaux) section of the PI2001 data sheet.
Rtn1 Vaux1 Return Connection: Connected to Ground plane
Gnd Vin & Vout Return Connection: Three Gnd connections are available and are connected to a common point, the Ground
plane. Input supplies Vin1 & Vin2 and the output load at Vout should all be connected to their respective local Gnd connection.
SL1 PI2001 (U1) Slave Input-Output Pin: For monitoring U1 slave pin. When U1 is configured as the Master, this pin functions
as an output that drives slaved PI2001 devices. When U1 is configured in Slave mode, SL1 serves as an input.
SL2 PI2001 (U2) Slave Input-Output Pin: For monitoring U2 slave pin. When U2 is configured as the Master, this pin functions
as an output that drives slaved PI2001 devices. When U2 is configured in Slave mode, SL2 serves as an input.
Vin2 Power Source Input #2 or bus input designed to accommodate up to 20 A continuous current.
Vaux2 Auxiliary Input Voltage #2 to supply PI2001 VC power. Vaux2 should be equal to Vin2 plus 5 V or higher.
See details in Auxiliary Power Supply (Vaux) section of the PI2001 data sheet.
Rtn2 Vaux2 Return Connection: Connected to Ground plane
FT1 PI2001 (U1) Fault Pin: Monitors U1 fault conditions
FT2 PI2001 (U2) Fault Pin: Monitors U2 fault conditions
Vout Output: Q1 and Q2 MOSFET Drain pins connection, connect to the load high side.
Table 1 – PI2001-EVAL1 Evaluation Board terminals description
Cool-ORing TM PI2001 Product Description
Jumper Description
J1, J3 BK Jumpers: Connect jumper across M for master mode and across S for slave mode. Remove jumper to adjust reverse fault
blanking time using Rbk. Rbk is R7 for U1 and R14 for U2 shown in the schematic, Figure 2.
J2 Slave Jumper: Remove the jumper unless one of the PI2001 is configured in slave mode.
Table 2 – PI2001-EVAL1 Evaluation Board jumpers description