Compact bridge rectifiers

28 February 2001 Power Electronics / Power Management

International Rectifier has introduced the new DF Series of compact 1 A, single-phase, full-wave bridge rectifiers with high power-to-volume ratios designed to provide greater power density in high-volume industrial and consumer electronic devices. Typical applications include compact power supplies and battery chargers for cellular phones, notebook computers and other portable and rechargeable devices.

The DF Series bridge rectifiers follow industry standard pin-outs and are compatible with all standard PCB assembly and soldering techniques. Soldering can be done below 245°C to minimise solder oxidation without losing meniscus and fillet formation. The rectifiers are also suitable for high temperature soldering (250-260°C for 8-10 s).

These compact bridges offer power-to-volume ratios with stable operation in a temperature range from -55 to +150°C. The package has high thermal conductivity in an electrically insulated, UL-approved case. The junction-to-case thermal resistance is among the best in the market with 60°C/W. Maximum repetitive peak reverse voltage range is 50 to 1000 V.

The bridge rectifiers are made with glass-passivated die and encapsulated in either a four-pin through-hole (D-70) or a surface-mount (D-71) dual in-line package. The devices are designed for input circuits in industrial and consumer equipment. They are encapsulated with QMFZ2 moulding compound, UL-certified under class 94V-0.

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