UL Approved Power Transformers Applications
DC to DC Power Supplies
AC to DC Power Supplies
LED Lighting
Battery Chargers
Inverters
Here at CET Technology, we design and manufacture custom flyback transformers. Flyback transformers differ from a typical transformer in that energy is accumulated and stored during some part of the waveform period and then transferred to the SEC during the remainder of that period. This requires the use of a gapped core so saturation is avoided while allowing enough energy to be stored and then transferred each cycle. Flyback transformers operate in either Discontinuous Conduction Mode or Continuous Conduction Mode.
Advantages of Discontinuous Conduction Mode flybacks compared with Continuous Conduction Mode flybacks are their lower primary inductance that set the maximum duty cycle. They are usually smaller, more efficient and they are inherently more stable than CCM flybacks that are more difficult to control through feedback. CCM flybacks do benefit from lower peak and RMS currents as well as lower EMI requiring smaller capacitors and filters.
Features
- The CET Series of International Transformers is designed and built to meet U.S. and international safety standards: EN60950, UL-1950, and CSA 22.2 No. 950
- Built with dual bobbins with insulating shrouds to provide 4000V RMS isolation between primary and secondary; eliminates the need for an electrostatic shield
- UL Recognized File #E146472
- Approved to CSA 22.2 No. 66
- Class B Insulation 130°C
- Custom versions also available
Download the PDF
Features
- The CET international chassis mount series is designed and built to meet U.S. and international safety standards: EN60950, UL-1950, and CSA 22.2 No. 950
- Built with dual bobbins with insulating shrouds to provide 4000VRMS isolation between primary and secondary
- UL recognized File #146472
- Approved to CSA 22.2 No. 66
- TUV approved
- Class B insulation 130°C
- Custom versions also available
Download the PDF
Features
The P/PDP series is an illustration of the use of creative design applied to small power transformers. The result is a line where, for a given VA rating, size, and weight are reduced almost 50%.
- BOBBIN WOUND – Maximum Utilization of Winding Area – Space and Size Reduced.
- SPLIT BOBBIN – NON-CONCENTRIC WINDING – Lower Capacitance – Better insulation – 2500V RMS Hipot – No need for Electro-Static Shield – High Isolation and Insulation Resistance. No Cross Overs of Primary and Secondary Leads
This series is available with single 115V or dual 115/230V primary, rated 50/60 Hz.
- UL Recognized File #E146472
- Approved to CSA 22.2 No. 66
- Class B Insulation 130°C
- Custom Versions also available.
Download the PDF
Features
- Hum-bucking (semi-toroidal) construction to diminish radiated magnetic field and balance winding.
- Low profile design
- Dual primaries: 115/230V, 50/60Hz
- 1500 V RMS HIPOT
- UL recognized File #E146472
- Approved to CSA 22.2 No.66
- Class B Insulation 130°C
- Custom versions also available
Download the PDF
Features
CET has a complete and diversified selection of miniature plug-in power transformers. Primary ratings of 115V (style PDPC-6 pin) or dual 115/230V (style PDPC-8 pin) are standard for the entire line. Size 1.0 is used extensively where height is a limiting factor since its height of 0.83 allows 1 inch spacing of PC boards. Size 24 is unusual since 24 watt PC transformers are not readily available, especially with a height of 1 3/8 inches.
- UL recognized File # E146472
- Approved to CSA 22.2 No. 66
- Class B insulation 130°C
- 1500V HIPOT standard
- Custom versions also available
Download the PDF
CET SPLIT BOBBIN-HIGHLY ISOLATED
The PST/PDST series of Split Bobbin Transformers are manufactured with the following features:
- High isolation – 2500V hipot is standard.
- Low capacitive cooling – no electrostatic shield necessary.
- UL Recognized File # E146472
- Approved to CSA 22.2 No. 66
- Class B Insulation 130°C
- Custom versions also available
- Less manufacturing time – no crossovers of primary and secondary leads.
- PC pins – allow direct insertion in PC boards.
Each transformer is available with single 115V or dual 115/230V primaries. In addition, secondaries are split so that they can be series or parallel connected.
Download the PDF
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