Introduction to Digital Power Monitoring and Telemetry Technology

　　What role do digital power devices play between startup and shutdown? Two core capabilities are monitoring and telemetry. Monitoring is a fast-acting safety feature that prevents damage to the device and/or load. Telemetry is an ongoing quality management function. A recent advertisement in "Bodo's Power Systems" magazine lists the following benefits of the above two functions for digital power:

　　●Optimization

　　●Predictive maintenance

　　●Fault detection

　　Here we take a look at a typical POL internal architecture and examine its impact on power system design.

　　POL internal structure

　　Figure 1 shows a simplified POL with 3 main functional blocks.

　　●Monitor

　　●Monitor

　　●Digital processing unit

　　The digital processing unit is the brains (not shown is the core power conversion). The digital processing unit is responsible for processing the PMBus and CONTROL inputs and asserting POWER_GOOD and FAULT/.

　　Most devices have multiple such POLs, but for simplicity we can insert inputs and outputs.

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