Signal/power isolator for secondary control start-up

7 March 2007 Power Electronics / Power Management

Designers of isolated secondary control power supplies must deal with the challenge of providing startup power to the secondary controller. This often involves the inclusion of an auxiliary power supply consuming more board space, design time, and expense. Analog Devices has introduced the ADuM5242 (isoPower) dual isolator that addresses this problem by providing a regulated 5 V/10 mA isolated output for starting up a secondary controller. The integrated DC-DC converter, along with two isolation channels for PWM signals, is implemented within a small 8-lead SOIC package. With an isolation rating of 2,5 kV rms, it has a maximum data rate of 10 Mbps and propagation delay 55 ns (max). It comes in a 5 x 6 mm, 8-lead SOIC package.

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