Cool-ORing™ Series Universal Active ORing Controllers, PI2001 PI2001 Features Fast dynamic response to power source failures, with 160 ns reverse current turn-off delay time 4 A gate discharge current Accurate MOSFET drain-to-source voltage sensing to indicate system level fault conditions Programmable under and overvoltage detection Overtemperature fault detection Adjustable reverse current blanking timer Withstands 100 V transients in low-side applications Master/Slave I/O for paralleling (TDFN package only) Active low-fault flag output PI2001 5 mm x 6 mm 8-Lead SOIC 3 mm x 3 mm 10-Lead TDFN Product Description The PI2001 Cool-ORingTM solution is a universal high-speed Active ORing controller IC designed for use with N-channel MOSFETs in redundant power system architectures. The PI2001 Cool-ORing controller enables an extremely low power loss solution with fast dynamic response to fault conditions, critical for high availability systems. The PI2001 controls single or parallel MOSFETs to address Active ORing applications protecting against power source failures. The PI2001 can be used in either high-side or low-side Active ORing applications and a master/slave feature allows the paralleling of IC/MOSFET chipsets for high current Active ORing. The gate drive output turns the MOSFET on in normal steady state operation, while achieving high-speed turn-off during input power source fault conditions, that cause reverse current flow, with autoreset once the fault clears. The MOSFET drain-to-source voltage is monitored to detect normal forward, excessive forward, light load and reverse current flow. The PI2001 provides an active low-fault flag output to the system during excessive forward current, reverse current, light load, overvoltage, undervoltage and overtemperature fault conditions. There is an internal shunt regulator at the VC input for high voltage applications and the undervoltage and overvoltage thresholds are programmable via external resistor dividers. Applications N+1 redundant power systems Servers & high-end computing Telecom systems Low & high-side Active ORing High-current Active ORing Part Numbering Part Number Target Application Bias Supply MOSFET Gate Drive Voltage MOSFET Gate Discharge Current Turn-off Delay Time Shipment Packaging Universal Low Voltage Up to 100 V (low side) 4.5 V – 13.2 V 8.5 V – 10.5 V 4 A (typ) 160 ns (typ.) Tape and Reel Package 3mm x 3mm 10 Lead TDFN PI2001-00-QEIG 8 Lead SOIC PI2001-00-SOIG Evaluation Boards PI2001-EVAL1 PI2001 Evaluation Board using 3 mm x 3 mm TDFN package and SO-8 MOSFET in high-side configuration. Typical Application PI2001 Performance Input Short Vin1 0V Return SN GATE FT VC PI2001 VC PI2001 FT VC GND OV SN GATE LOAD SP UV 0A Input Current Normal operation (forward current) Reverse Current SP GND Vd (Redundant Bus) Vin1- Reverse detection SP GND OV LOAD VC PI2001 FT PI2001 VC VC SN GATE UV 0V SN GATE SP GND 160ns Turn Off Delay Time Vin2- High-side Active ORing Vgate FT Low-side Active ORing MOSFET Miller Effect Vs (Input) Vin2 0V Typical dynamic response of the PI2001 to an input power source short circuit fault condition. Defining the Quality of Power Through Innovation picorpower.com 800-735-6200 Rev 1.0 07/08