Texas Instruments Incorporated (TI) (NYSE: TXN) introduced a family of ORing power controllers with advanced features and high performance that improves power distribution in 12 V blade servers, N+1 telecom systems and redundant low-voltage processor power supplies. The integrated circuits provide a high-efficiency replacement for ORing diodes, and offer intelligent monitoring and control of power supplies to prevent bus transient events from causing board-damaging faults or voltage spikes during operation. TI will demonstrate the new controllers at the Applied Power Electronics Conference (APEC), February 26 – March 1, 2007, in Anaheim, Calif.
TI’s new TPS241x family of ORing controllers support input voltages of 3 V to 18 V, and can control power supply voltages down to 0.8 V. When used with a low Rdson N-channel MOSFET, the controllers significantly increase system efficiency and reduce power dissipation compared to today’s standard ORing diode solutions. The TPS241x devices seamlessly manage power distribution to multiple supplies, while protecting the system from potentially dangerous reverse-current or transient events by providing an extremely fast turn-off response of 130 nanoseconds. In addition, the controllers feature a programmable turn-off threshold and an input filtering function to protect the power supply’s integrity, especially when the system must adjust to various bus characteristics caused by extreme and heavy-use operating conditions.
The TPS2410 and TPS2412 controllers incorporate linear gate control, giving power system designers greater flexibility to implement ORing in high-power applications. The TPS2411 and TPS2413 controllers utilize ON/OFF gate control to support low-power buses that may experience large transient steps.
Key Specifications of the TPS2410:
- Controls external FET for N+1 and ORing
- Wide supply voltage range of 3 V to 18 V
- Controls buses from 0.8 V to 18 V
- Linear or on/off control method
- Accurate and adjustable threshold permits precise control of turn-off
- Control mechanisms permit device operation to be tailored to the application
- Soft turn-on feature reduces bus transients
- Internal charge pump for N-channel MOSFET
- Industrial temperature range of -40 to +85C
The TPS241x family of power controllers is available now in volume production from TI and its authorized distributors. The devices come in a 14-pin, plastic, thin small-outline package. Suggested resale pricing for the TPS2410 and TPS2411 is $1.70 each in quantities of 1,000 units. The low-cost TPS2412 and TPS2413 versions, which come in an 8-pin, thin small-outline package, are $1.20 each in quantities of 1,000. Evaluation modules for the TPS2410 and other TI hot swap controllers and power management application notes and design tools are available online.