TI Presents New UCC39002 Load Share Controller

Texas Instruments Inc. (TI, Dallas, TX) introduced an advanced, high-performance, cost-effective, load-share controller, the UCC39002, which provides increased functionality to parallel multiple independent power supplies. The controller equalizes the output currents of several parallel power supplies of high-power and high-reliability applications in telecommunications, data communications and other distributed power systems.

The UCC39002 provides less than one-percent current share error between modules at full load by utilizing a low-offset, post-package-trimmed, current-sense amplifier. With the amplifier's common-mode range of 0V to 15V, the current-sense resistor can be placed in either the ground return path or in the positive output rail of the power supply. Moreover, the UCC39002 protects the system by disconnecting the unit from the remaining active load share bus supplies when power supplies are being removed or added to the board. The device also provides system protection by disabling the adjust function when the load share bus is shorted to either the ground or the supply rail.

The UCC39002 controller, as well as the industrial temperature grade, the UCC29002, are now available in standard through-hole, surface-mount and space-saving, eight-pin MSOP packages. Pricing is $0.89 in quantities of 1,000.