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Vishay Dale IFBT Series: Surface-Mount Flyback Transformers for Isolated Power Supplies

Vishay Intertechnology has introduced the Dale IFBT series — a family of 17 surface-mount flyback transformers designed for Power over Ethernet (PoE) power supplies and isolated DC/DC converters rated up to 30 W. The series offers flexible winding configurations and high isolation performance in a compact SMD package.

Key Specifications

• Number of models: 17 surface-mount transformers
• Input voltage range: 26 V – 72 V
• Switching frequency: 250 kHz
• Isolation voltage: 1500 VRMS for 60 seconds
• Output voltage range: 1.8 V – 24 V
• Output current range: 0.5 A – 9 A
• Maximum power: up to 30 W (PoE 6 W / 30 W designs supported)
• Inductance: 35 µH – 75 µH
• Operating temperature: -40°C to +125°C
• Package: Surface-mount (SMD)
• Construction: Open construction with multiple windings (series/parallel configurable)
• Compliance: RoHS compliant

The multiple windings can be connected in series or parallel, giving designers the flexibility to match the exact voltage and current requirements of their application. The open construction also allows modification of the windings when a custom configuration is needed.

Target Applications

• Power over Ethernet (PoE) power supplies
• Isolated DC/DC converters up to 30 W
• Industrial control and automation systems
• Telecom equipment
• Building and home controls
• Automotive LED drivers
• Energy systems and medical instrumentation

The compact SMD form factor and wide temperature range make the IFBT series well-suited for space-constrained and industrial-grade designs.

Source: Electronics For You