Flyback Transformers (Telecom input, 3.3 – 36 Vdc)

Input range: Telecom (36 – 57 Vdc) Telecom (36 – 72 Vdc) | Telecom (14 – 72 Vdc) | 400 Vdc | AC line

These standard parts are available with opional tin-lead or tin-silver-copper terminations, which can improve the solder fillet and ensure an exceptionally reliable solder joint, and may also be available with an extended temperature range.

If no transformer meets your design criteria, review our application note Using Standard Transformers in Multiple Applications to determine if one of our other standard product offerings will work in your specific application.

For more information about transformer design, download the Coilcraft Structured Design Guide for Switching Transformers for a step-by-step guide to transformer design or contact Coilcraft for assistance.

3.3  Vdc Input
1.2 12 V, 0.1 A 330 1 : 2 100 DA2420-AL ST Micro STE12PS
1.2 12 V, 0.1 A 330 1 : 2 100 DA2421-AL ST Micro STE12PS
4 – 6  Vdc Input
4.5 5 V / 0.9 A 47 1 : 1 100 S6057-AL NSC LM258X (T7)
4.5 5 V / 0.9 A 47 1 : 1 100 S6000-AL NSC LM258X (T7)
8.0 5 V, 1.6 A 22 1 : 1 100 Q4435-BL NSC LM258X (T1)
8.0 5 V, 1.6 A 22 1 : 1 100 Q4434-BL NSC LM258X (T1)
8.4 12 V, 0.35 A
–12 V, 0.35 A
22 1 : 2.5
1 : 2.5
100 Q4436-BL NSC LM258X (T2)
8.4 12 V, 0.35 A
–12 V, 0.35 A
22 1 : 2.5
1 : 2.5
100 Q4337-BL NSC LM258X (T2)
4.5 – 8.5  Vdc Input
4.0 –48 V, 0.083 A 19 1 : 16 125 FA2469-AL STMicro STLC3075
5 – 24  Vdc Input
18.0 5 V, 3.6 A
15 V, 1.2A
–15 V, 1.2A
7.5 1 : 0.5
1 : 1.5
1 : 1.5
100 HA3994-AL Linear LT3751 Cap. Charger
8.5 – 12  Vdc Input
4.0 –48 V, 0.083 A 19 1 : 8 125 FA2470-AL STMicro STLC3075
9 – 20  Vdc Input
4.1 24 V, 0.17 A
72 V, 0.17 A
6 1 : 3
1 : 9
600 IFLY0012L Intersil ISL6401 
10 – 14  Vdc Input
5 3.3 V, 1.5 A 25 1 : 0.14 250 GA3431-BL  
5 5.0 V, 1.0 A 25 1 : 0.20 250 GA3430-BL  
18 – 36  Vdc Input
15.0 5 V, 1.8 A
12 V, 0.25 A
–12 V, 0.25 A
55 1 : 0.5
1 : 0.167
1 : 0.167
100 Q4437-BL NSC LM258X (T5)
15.0 5 V, 1.8 A
12 V, 0.25 A
–12 V, 0.25 A
66 1 : 0.5
1 : 0.167
1 : 0.167
100 Q4338-BL NSC LM258X (T5)
15.1 12 V,  0.63 A
–12 V, 0.63 A
65 1 : 1.2
1 : 1.2
100 Q4438-BL NSC LM258X (T6)
15.1 12 V,  0.63 A
–12 V, 0.63 A
66 1 : 1.2
1 : 1.2
100 Q4339-BL NSC LM258X (T6)
33.0 12 V,  0.75 A
–12 V, 0.75 A
 5 V, 3 A
85 1 : 0.35
1 : 0.8
1 : 0.8
100 Q4344-BL NSC LM258X (T4)
33.6 12 V, 1.4 A
–12 V, 1.4 A
85 1 : 0.8
1 : 0.8
100 Q4343-BL NSC LM258X (T3)
20 – 28  Vdc Input
5 3.3 V, 1.5 A 24 1 : 0.25 250 GA3429-BL Linear LT3573
22 – 26  Vdc Input
50 53 V, 1.0 A 35 1 : 1.4 150 GA3136-BL TI UCC2809
400 Vdc
44 110 V, 0.4 A 800 1 : 0.35 250 GA3502-BL Maxim MAX16801 LED Driver