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TI tips 2A, 3A SWIFT converters with dual outputs

Posted: 06 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:dual-output? SWIFT DC/DC step-down converters? integrated FET?

Texas Instruments Inc. introduced four new dual-output SWIFT DC/DC step-down converters with integrated FETs that deliver 2A and 3A of continuous output current and support input voltages of 4.5V to 28V. The simple-to-design switchers, which come in a monolithic package, speed time to market, reduce external component count and help reduce cost for point-of-load systems used in a wide variety of applications including HDTVs, set-top boxes and other consumer electronic systems.

TI's new 2A TPS54283 and TPS54286 and 3A TPS54383 and TPS54386 SWIFT converters reduce input capacitance by switching each output at 180 out-of-phase at a frequency of 300kHz and 600kHz. Each device features current mode control and integrates the compensation components to lower the total number of required external parts. A unique sequencing pin helps designers meet critical sequencing requirements without additional circuitry by allowing the user to select which output ramps up first or to program both outputs to ramp ratio-metrically.

TI's new dual-channel, non-synchronous converters provide high efficiency and 1.5 percent output voltage accuracy (down to 0.8V) for each output. With three selectable levels of over-current protection, low on-resistance and a thermal shutdown of 145C, the devices excel in hot environments where good thermal performance is needed, such as in DLP HDTV that operates without the use of a cooling fan.

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