Specification Demystification: Understanding Power Supply Hold-up Time

What You'll Learn

While many of the developed world’s power grids are robust and mature systems, they are not perfect. The mains voltage (available from the outlets in homes, offices, hospitals and other facilities), supplying power to the electrical devices we use every day, is vulnerable to a number of complications. 

How well a given power converter responds to one such complication: momentary dropouts, can be gleaned from its specified hold-up time.

This technical bulletin will provide a comprehensive overview of power supply hold-up time, including...

• Why it matters
• How it is determined
• And how it is measured

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