mag amp toroids C g642x series document 140-1 document 140-1 revised 03/22/12 these low cost saturable reactor (mag amp) coils are designed to regulate switching power supplies operating at frequencies from 20 khz to over 100 khz. in multi-output circuits requiring tight crossregulation, mag amp control is simple and more cost-effective than add - ing conventional linear voltage regulators to each output. mag amps are also particularly advantageous where load current exceeds 1 or 2 amps, because of their effciency and low heat dissipation. coilcraft designers kit no. p206 contains samples of all values shown. to order, please contact coilcraft or visit http://order.coilcraft.com . advantages ? higher effciency than linear regulators, especially at higher currents ? simple cross-regulation of multi-output supplies ? lower emi ? frequency range of 20 khz to over 100 khz ? standardized construction for maximum economy electrical specifcations G6421-A g6422-a g6423-a g6424-a g6425-a g6426-a current 1 1 a 1 a 1 a 5 a 5 a 5 a volt-time product 93 v-sec 133 v-sec 372 v-sec 42 v-sec 66 v-sec 186 v-sec (typical) weight (g) 4.4 5.5 9.6 5.2 6.6 12.8 1. based on 40c maximum temperature rise. 2. operating temperature range C40c to +85c. 3. electrical specifcations at 25c. this product is not rohs-compliant. contact coilcraft for current status or possible alternatives. us uk t aiwan china singapore +1-847-639-6400 sales@coilcraft.com +44-1236-730595 sales@coilcraft-eur ope.com +886-2-2264 3646 sales@coilcraft.com.tw +86-21-6218 8074 sales@coilcraft.com.cn + 65-6484 8412 sales@coilcraft.com.sg ? coilcraft inc. 2012 this pr oduct may not be used in medical of high risk applications without prior coilcraft appr oval. specification subject to change without notice. please check out web site for latest infor mation.
mag amp toroids - g642x series document 140-2 test circuit the test circuit below can be used to test the volt-time product supported by each of the mag amp coils. apply the square wave to the coil and observe the current waveform (voltage across the series resistor). increase the applied voltage until a spike appears at the end of each half cycle, indicating core saturation. saturation is defned as the point at which the magnitude of the spike has become twice the peak value of the square wave. (actually the current square wave is not fat but gradually increases due to the magnetizing current.) to record the volt-time product, multiply the applied peak voltage by the time required to reach saturation and divide by two. the series resistor should be as small as possible, with - out loading the square wave supply. if the square wave generator is powerful enough, the differential amp may not be necessary. part number a max b max c max G6421-A 0.85/21,59 0.65/16,51 0.825/20,96 g6422-a 1.00/25,40 0.65/16,51 0.825/20,96 g6423-a 1.25/31,75 0.65/16,51 1.150/29,21 g6424-a 0.90/22,86 0.55/13,97 0.825/20,96 g6425-a 1.05/26,67 0.55/13,97 0.825/20,96 g6426-a 1.30/33,02 0.55/13,97 1.150/29,21 0.150 3,81 0.600 0.010 15,24 0,254 0.040 0.003 1,02 0,08 dia b a 4 2 nc 1 0.250 0.010 6,35 0,254 1 1 4 2 22 4 c +0.025 ?0.010 +0,635 ?0,254 cc-3y xxxx g642x-a pa rt n umber inter nal code pa rt s manuf actured pr ior to f ebr uar y, 2012 ma yb e mar ke d diff erently . dimensions inductor under test v t t 2v v applied v applied v r (scope) r s square wa ve generator differential amplifier scope + ? 00 ++ ?? document 140-2 revised 03/22/12 us uk t aiwan china singapore +1-847-639-6400 sales@coilcraft.com +44-1236-730595 sales@coilcraft-eur ope.com +886-2-2264 3646 sales@coilcraft.com.tw +86-21-6218 8074 sales@coilcraft.com.cn + 65-6484 8412 sales@coilcraft.com.sg ? coilcraft inc. 2012 this pr oduct may not be used in medical of high risk applications without prior coilcraft appr oval. specification subject to change without notice. please check out web site for latest infor mation.
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