Product Brief
Dual 3A DC/DC converter offers fault protection
Kristin Lewotsky1/26/2012 1:18 PM EST
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A dual-independent channel, step-up DC/DC converter provides integrated fault protection features for output shorts, I/O overvoltages, and over-temperature conditions. Each channel of Linear Technology Corp.’s LT8582 uses two integrated 42 V switches: a 1.7-A master switch and a 1.3-A slave switch that can be tied together for a total current limit of 3 A. The LT8582 operates from an input voltage range of 2.5 V to 22 V with transient protection to 40 V, and each channel can be independently configured as a boost, SEPIC, inverting, or flyback converter.
The LT8582’s VCESAT switches at 0.27 V (tied together at 2.75 A) can deliver efficiencies up to 90%. A power good pin offers ease of use for event-based sequencing. For high-voltage outputs, the LT8582’s slave switch allows high-power charge pump topologies that require minimal external components. Users can program the converter’s switching frequency via a single resistor or synchronized to an external clock between 200 kHz and 2.5 MHz, minimizing external component sizes and avoiding “noise critical” frequency bands. Users also can adjust under-voltage lockout. Each channel requires a single feedback resistor to set the output voltage. Other features include external synchronization capability, output short circuit protection, and frequency foldback.
The LT8582EDKD comes in a 7-mm x 4-mm DFN-24 package and costs $3.75 each for 1,000-piece quantities. An industrial temperature (-40°C to 125°C) version, the LT8582IDKD, costs $4.13 each for 1,000-piece quantities. Both versions are available from stock. For more information, visit www.linear.com/product/LT8582.
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The LT8582’s VCESAT switches at 0.27 V (tied together at 2.75 A) can deliver efficiencies up to 90%. A power good pin offers ease of use for event-based sequencing. For high-voltage outputs, the LT8582’s slave switch allows high-power charge pump topologies that require minimal external components. Users can program the converter’s switching frequency via a single resistor or synchronized to an external clock between 200 kHz and 2.5 MHz, minimizing external component sizes and avoiding “noise critical” frequency bands. Users also can adjust under-voltage lockout. Each channel requires a single feedback resistor to set the output voltage. Other features include external synchronization capability, output short circuit protection, and frequency foldback.
The LT8582EDKD comes in a 7-mm x 4-mm DFN-24 package and costs $3.75 each for 1,000-piece quantities. An industrial temperature (-40°C to 125°C) version, the LT8582IDKD, costs $4.13 each for 1,000-piece quantities. Both versions are available from stock. For more information, visit www.linear.com/product/LT8582.
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Did you find this article of interest? Then visit Military & Aerospace Designline, where we update daily with design, technology, product, and news articles tailored to fit your world. Too busy to go every day? Sign up for our newsletter to get the week's best items delivered to your inbox. Just click here and choose the "Manage Newsletters" tab. You can also follow us on Twitter at @MilAeroDL.
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