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M-FIAM5M12 Datasheet(PDF) 4 Page - Vicor Corporation |
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M-FIAM5M12 Datasheet(HTML) 4 Page - Vicor Corporation |
4 / 5 page Set your site on VICOR at www.vicorpower.com Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 MFIAM5 Rev. 1.7 Page 4 of 5 + – + – R1 R2 D1 C1 R3 64.9k R4 64.9k R5 10K R6 10K R7 R8 24.3k R9 14.0k R10 1.0K C2 .1ufd C3 Cbulk 880 Uf d 2.0k 2.0k 4.7uf, 63v Input +28v rtn 15v, 1N5245B U1A LM258N 615001 1.0k Vicor FIAM & Mods Vc Q1 IRFP3710 ND PN U1B LM258N U2 LM4040CIZ-5.0 1 2 3 4 8 5 6 7 8 4 4 1 2 3 2 3 +28V C1 4.7uF, 63V C2 0.1uF C3 880uF, 100V D1 1N5245B Q1 IRFP3710ND R1 2.0K R2 2.0K R3 64.5K R4 64.5K R5 10K R6 10K R7 1K R8 24.3K R9 14K R10 1K U1 LM258N U2 LM4040CIZ-5.0 Transient Surpressor Circuit Vout Volts 50 27 28 32 12.5 Millisec Max Vin Vout MIL-STD-704E Transient / Overvoltage Protection The standard (COTS) 24V input 2nd Generation Converter Modules may be used in Military 28 volt applications. The M-FIAM5 provides compliance to MIL-STD-461E conducted emissions and susceptibility standards. Additional circuitry, as illustrated in the accompanying schematic (see Fig. 1), provides compliance to the MIL-STD-704E transient overvoltage specification. The 24V input modules employ undervoltage and overvoltage protection. These converters, shut down if the input falls below 18V or rises to 36V or above.18V is consistent with the MIL-STD-704E specification, but the standard also requires uninterrupted performance in the event of an input voltage transient to 50V for a period of 12.5 millisec. The above referenced circuit clamps the input voltage, in the event that it exceeds 32V, as illustrated in figure 2. This performance prevents the converter from shutting down, thus meeting the transient overvoltage specification of MIL- STD-704E. Figure 1– Transient / Overvoltage protection circuit. Figure 2– Overvoltage clamping Addendum A |
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