The MCI 4-81 Series PC Mount standard EE style switchmode transformers are the right fit for customers who need cost effective solutions to switching magnetics requirements.
Applications for these transformers are DC-DC and rectified offline switchers using flyback, forward, pushpull, halfbridge, or full bridge topologies. Adaptations of standard transformers are also available.
MAXIMUM OUTPUT POWER @ 100KHZ
| SIZE CODE | FLYBACK FORWARD | PUSH PULL BRIDGE | CORE SIZE | L | W | H | A | B | C | NUMBER OF PINS | WT. (GRAMS) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 4-81-1 | 5 | 6 | 125SMT | 0.68 | 0.55 | 0.43 | 0.4 | .10TYP | 0.15 | 12 | 3.6 |
| 4-81-2 | 5 | 6 | 125 | 0.68 | 0.55 | 0.43 | 0.4 | .10TYP | 0.15 | 12 | 3.6 |
| 4-81-3 | 10 | 12 | 187 | 0.75 | 0.71 | 0.68 | 0.51 | 0.15 | .20TYP | 8 | 14 |
| 4-81-4 | 24 | 29 | 250 | 1.03 | 0.82 | 0.85 | 0.62 | 0.15 | .20TYP | 10 | 20 |
| 4-81-5 | 110 | 132 | 375 | 1.47 | 1.08 | 1.04 | 0.87 | 0.15 | .20TYP | 12 | 55 |
These transformers are designed to meet UL and CSA requirements and are Hipot tested at 1000VRMS standard with higher voltages avaiable. MCI´s 4-81 Series utilizes standard materials for quick turnaround of custom variations. MCI´s “State of the art” manufacturing facilities provide automatic assembly and 100% final testing to guarantee a high quality part. Our design engineers are knowledgeable regarding switchmode magnetics and can provide many solutions for your switching applications.
The above transformers can be used in four topologies, flyback, forward, pushpull, and bridge converters. For supplies in the 5-110 watt range the flyback is recommended. It has the least parts count, only one input switching devices, and no output inductor or freewheeling diode. It also exhibits excellent tracking between multiple outputs.
Information required to order a 4-81 Series Transformer:
