Digital Power
Current
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Figure 1a: The effects of parallel connecting two power supplies without share control
Power supplies with digital control are gaining in popularity. However the term ‘digital control’ is commonly applied to two quite different meanings.
The two main terms are; ‘Digital power management’ where customers communicate with the power supply to monitor status and adjust certain
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Date:
1/1/2012
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Figure 1: GUI view of Auto Compensation page
Stability is a critical operational requirement for power supplies. In regulated power supplies, the stability is controlled, by a large part, by the characteristics of the feedback path.
Power supply engineers need to be conscientious of these characteristics during design to ensure stable
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Date:
1/1/2012
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Figure 1: Digital POL Power Scheme
An engineer designing with FPGAs or Processors often has to provide some serious amount of power at high efficiency over load. Not only must the rails be regulated correctly and not overheat, but additional functionality may be required.
Recent evaluation boards from Xilinx (ML605 and SP605)
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Date:
1/1/2012
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Figure 1: Application Schematic with 2 High Current Outputs Using the LTC3880
Digital power has been hyped by many companies for several years and some consider digital power to be comprised of digital functions and a communications link with a power supply.
Several other companies in the industry say that digital power is a state machine with a built-in chip featuring
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Date:
1/1/2012
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Figure 1: Supplies are margined by changing the resistor connected to the Trim/FB node
Modern microprocessors, FPGAs and other complex ICs require accurate power supply voltages, often more accurate, in fact, than the tolerances provided by commodity low-dropout regulators (LDOs) and DC-to-DC power supplies. More precise power supplies are available, but at a premium price. The cost
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Date:
1/1/2012