Redundant power systems

Powerbox has released the Cool-ORing family of full-function active ORing solutions (PI2121, PI2122, PI2123, PI2125) and discrete active ORing controllers (PI2001, PI2002, PI2003).

These are solutions for 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 full-function active ORings with integrated high-speed ORing MOSFET controllers and low on-state resistance MOSFETs for 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 device suitable for ≤5 Vbus applications; the PI2123 is a 15 V, 15 A device suitable for ≤9.6 Vbus applications; and the PI2125 is a 30 V, 12 A device solution for 12 Vbus applications.

The PI2121/PI2123/PI2125 are small, high-density, thermally enhanced 5 x 7 mm land grid array packages, maintaining full current ratings over a wide range of operating temperature.

The high level of density is enabled by integrating a low on-state resistance MOSFET into each product. The typical on-state resistances are 1.5, 3 and 5.5 mΩ for the PI2121, PI2123 and PI2125. Each product can also be paralleled for 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 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 enables low-loss biasing directly from the -48 V rail.

The PI2122 is a full-function active ORing with a circuit breaker feature, integrating a high-speed MOSFET controller and low on-state resistance MOSFET in the high-density thermally enhanced 5 x 7 mm land grid array package.

It is designed for redundant power system architectures, suitable for ≤5 Vbus applications where added protection against load fault conditions is required. It is a 7 V, 12 A device with integrated back-to-back configured MOSFETs with an effective 6 mΩ typical on-state resistance enabling high efficiency.

The PI2122 provides fast dynamic response to both input power source and output load fault conditions, typically within 140 and 170 ns, acting as a true bi-directional switch.

The PI2002 is a high-speed active ORing controller IC with a load disconnect feature that functions similarly to the PI2122 but is designed for use with industry standard back-to-back N-channel MOSFETs.