Picor, a subsidiary of Vicor specialising in the design and development of high performance power management solutions, has announced the Cool-ORing family of full-function Active ORing solutions (PI2121, PI2122, PI2123, PI2125) and discrete Active ORing controllers (PI2001, PI2002, PI2003). These solutions address the requirements of redundant power architectures implemented in high-availability systems such as servers, high-end computing and telecom and communications infrastructure systems.
The PI2121/PI2123/PI2125 are complete full-function Active ORing solutions with integrated high-speed ORing MOSFET controllers and very low on-state resistance MOSFETs. They address a variety of redundant bus applications, providing low power dissipation while achieving fast dynamic response, typically within 160 ns, to system-level power source fault conditions. The PI2121 is an 8 V, 24 A solution suitable for ≤5 V bus applications, the PI2123 is a 15 V, 15 A solution suitable for ≤9,6 V bus applications and the PI2125 is a 30 V, 12 A solution suitable for 12 V bus applications.
The PI2121/PI2123/PI2125 solutions are offered in small, high-density, thermally enhanced 5 x 7 mm land grid array packages, maintaining full current ratings over a wide range of operating temperatures. The typical on-state resistances are 1,5 mΩ, 3 mΩ and 5,5 mΩ respectively for the PI2121, PI2123 and PI2125. Each product can also be paralleled to address higher current requirements through a master/slave feature, enabling a scalable solution for a wide range of Active ORing requirements.
The PI2121/PI2123/PI2125 detect normal forward, excessive forward, light load, and reverse current flow through their internal MOSFETs, and report fault conditions via an active low fault flag output. 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 external resistor dividers.
The PI2001 is a discrete high-speed Active ORing controller with similar functionality and feature set, for use with industry standard single or paralleled MOSFETs. The PI2003 is specifically optimised for use in -48 V redundant power architectures, and is suitable for systems requiring operation during input voltage transients up to 100 V for 100 ms. The low quiescent current of the PI2003 enables simple low-loss biasing directly from the -48 V rail.
The PI2122 is a complete full-function Active ORing solution with a circuit breaker feature, integrating a high-speed MOSFET controller and very low on-state resistance MOSFET. It is designed for use in redundant power system architectures, suitable for ≤5 V bus applications where added protection against load fault conditions is required. It is a 7 V, 12 A solution with integrated back-to-back configured MOSFETs with an effective 6 mΩ typical on-state resistance enabling very high efficiency. It provides fast dynamic response to both input power source and output load fault conditions, typically within 140 ns and 170 ns respectively, acting as a true bi-directional switch. In addition to responding to a reverse current fault condition, when the PI2122 detects excessive forward current, over-temperature, under- and over-voltage faults, it will rapidly turn off the internal MOSFETs to provide a load disconnect feature. It also provides a user programmable auto-retry off-time during excessive forward current fault conditions.
The PI2002 is a high-speed Active ORing controller IC with a load disconnect feature that functions similar to the PI2122, but is designed for use with industry standard back-to-back N-channel MOSFETs.
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