Even the best designs, manufacturing techniques and process control programs will produce units that can have an infant mortality in the field. We, at Beta Dyne, eliminate this infant mortality through our dynamic burn-in process in which all our converters are subjected to 48 total hours of dynamic burn-in.

The first 24 hours of dynamic burn-in occurs before the converters are potted, consisting of 50% full load (or static load) and 50% dynamic (or switching load). The 50% switching load is applied to the output of the units at the rate of 100 times per second (100Hz). After the units are potted with UL-Recognized (94V-0) soft potting material, they are burned in under the same loading as above for another 24 hours (see Figure 1).

The flexibility of each of our independent burn-in racks (see Figure 2)—which can accommodate up to 750 converters each—allows for almost unlimited burn-in capability. Temperature sensors built into each burn-in rack prevents thermal runaway. When the internal temperature reaches maximum, the sensors activate an AC fan keeping the operating temperature below its maximum limit. The sensors can be set to any elevated temperature above 25°C to accommodate various applications.

The burn-in racks are designed not only to burn-in the converters at room temperature, but can also be used as elevated temperature ovens by using the heat generated by the converters and setting the adjustable thermostat to the needed maximum temperature.

Since the extensive burn-in process at elevated temperatures is performed at our facility, any infant mortalities will be caught before reaching our customers. This ensures that we are able to deliver to you the highest-performing converters that pass our quality control process.