document 183 specifications subject to change without notice. document 183 revised 12/29/00 magnetics for lm258x flyback regulator these standard flyback regulator transformers are designed for use with national semiconductor lm2585, lm2586, lm2587 and lm2588 simple switcher ? switching regulators. they are available in both surface mount and through hole configurations. all feature 500 v isolation between windings and a variety of available turns ratios. 1 operating temperature range -40 c to +85c. 2 electrical specifications at 25 c. isolation ref. part l 15% turns pri/sec number number (h) ratio (vrms) t1 (sm) q4435-b 22 1 : 1500 t1 (pc) q4434-b 22 1 : 1500 t2 (sm) q4436-b 22 1 : 2.50 : 2.50 500 t2 (pc) q4337-b 22 1 : 2.50 : 2.50 500 t3 (pc) q4343-b 85 1 : 0.8 : 0.8 500 t4 (pc) q4344-b 85 1 : 0.35 : 0.8 : 0.8 500 t5 (sm) q4437-b 55 1 : 0.5 : 1.167 : 1.167 500 t5 (pc) q4338-b 66 1 : 0.5 : 1.167 : 1.167 500 t6 (sm) q4438-b 65 1 : 1.20 : 1.20 500 t6 (pc) Q4339-B 66 1 : 1.20 : 1.20 500 t7 (sm) s6057-a 47 1 : 1500 t7 (pc) s6000-a 47 1 : 1500 leaded - t3, t4 leaded - t1, t2, t5, t6, t7 1 a max b max c max d e g h i 1.00/ 25,40 .750/ 19,05 .600/ 15,24 .870/ 22,10 .670/ 17,02 .100/ 2,54 .150/ 3,81 .100 x .020/ 2,54 x 0,51 a max b max c max d max f g h i dia. .950/ 24,13 .825/ 20,96 .700/ 17,78 .180/ 4,57 .514/ 13,06 .150/ 3,81 .200/ 5,08 .047/ 1,19 a max b max c max d max f g h i dia. 1.100/ 27,94 1.100/ 27,94 .950/ 24,13 .180/ 4,57 .620/ 15,75 .150/ 3,81 .200/ 5,08 .044/ 1,12 surface mount - t1, t2, t5, t6, t7 t1, t7 t2, t6 t5 t1, t7 t2, t6 t5 t3 t4 4 .com u datasheet
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