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High reliability, small size
-55 to +105C operation
16 to 40VDC input
Fixed frequency, 430kHz typical
Inhibit function
Short circuit protection
Optocoupler feedback
Hermetic DIP

The WKI28***-5H Series of high frequency DC/DC converters offers high performance for low power, military/aerospace and aviation applications. WKI28***-5H parts provides up to 5 watts output power over the full temperature range of -55 to +105 C with up to 78% efficiency.
The WKI28***-5H Series small size, low height, and hermetically sealed metal enclosures make them ideal for use in military, aerospace and other high reliability applications. Units are available with standard screening, and fully compliant class E/M screening.
The WKI28***-5H Series converters use a flyback converter design with a constant switching frequency of 430 kHz. They are regulated, isolated units using a pulse width modulated topology and built as high reliability thick-film hybrids. Isolation between input and output circuits is provided with a transformer in the forward power path and an optical link in the feedback control loop. Negative output regulation is maintained by tightly coupled magnetics.
The WKI28***-5H Series is compatible with Interpoint MSA Series.

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