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53508 Datasheet(PDF) 3 Page - Micropac Industries |
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53508 Datasheet(HTML) 3 Page - Micropac Industries |
3 / 5 page 53508 Series Solid State Power Controllers Micropac Industries cannot assume any responsibility for any circuits shown or represent that they are free from patent infringement. Micropac reserves the right to make changes at any time in order to improve design and to supply the best product possible. MICROPAC INDUSTRIES, INC. MICROCIRCUITS PRODUCTS DIVISION • 905 E. Walnut St., Garland, TX 75040 • (972) 272-3571 • Fax (972) 494-2281 www.micropac.com E-MAIL: microsales@micropac.com 11/30/06 Rev B Pg. 3 of 5 TRIP PROFILE 0 100 200 300 400 500 600 700 0.01 0.1 1 10 100 TIME (SEC) ALWAYS TRIP NEVER TRIP TRIP PROFILE The Trip Profile is a combination of 2 separate functions; the I²t Circuit protection and the Short Circuit protection. The I²t Circuit protection continuously monitors the Load Current and when the Load Current exceeds a preset limit (110 to 120% of rating) the Time-Integral of the difference determines the Trip time as indicated by the curved line on the chart (Typical Turn-off time is <1uS). The Short Circuit protection continuously monitors the Load Current and when the Load Current exceeds a preset limit (600% of Rating) it immediately shuts down the SSPC (Typical response time is < 50uS, Typical Turn-off time is <1uS). Trip Profile External Trim The Trip Profile is externally Programmable by connecting the proper resistance between Pins 12 and 13 (Trip Set - and Trip Set +). The following formula dictates the Profile setting: Rext = ( 7 * Xprog / (1 – Xprog)) – 3 Where Xprog is the ratio of the desired trip point to the device rating. (0.3 < Xprog < 1) Rext is in KOhms. Table 1 provides typical solutions for Rext. |
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