Articles - Supply - 5

A power supply that I was examining used an opto-coupler in its feedback path for control of its output voltage. This is a commonplace and well established design approach, but the feedback loop’s unconditional loop stability was not ...

A switched-mode power supply (SMPS) employing peak current-mode control (PCMC) requires a ramp signal to slope-compensate the inner (current) control loop. Slope compensation stabilizes the current loop, which would otherwise exhibit subharmonic ...

Using two unipolar dc supplies in an anti-series configuration is another approach for generating positive and negative voltage and one that doesn't suffer from power interruption. In 2012, I wrote two articles in Electronic Design that ...

Developed as a three-terminal shunt regulator, the popular and multiple-sourced TL431 IC offers designers many intriguing possibilities beyond its intended application. Internally, the TL431 comprises a precision voltage reference, an operational ...

This Design Idea shows how to keep telecom equipment operational during a short brownout. You must first understand a few details regarding the power supply for telecom equipment. The common voltage of the power source that feeds telecom equipment ...

Introduction Flyback power converters are currently some of the most common converter topologies around. This is due to the simplicity of their design and the competitive size/cost/efficiency ratio their can deliver, especially in the mid-level ...

EMI is a plague upon power electronic design architectures, and it can be mitigated in numerous ways. Adding an EMI filter may seem like the most obvious choice, but there may be a better first step. Modern electronic power system architectures are ...

Introduction The high dv/dt and di/dt switching transients during MOSFET commutation are the chief sources of both conducted and radiated EMI from switching DC/DC regulators. While the optimization of PCB layout for gallium-nitride (GaN) switching ...

For containing large amounts of bulk capacitance, controlling inrush currents poses problems. The simplest approach involves placing an inrush-limiting resistor in series with the capacitor bank, but a resistor wastes power and adds a voltage drop. ...

Reducing low-frequency (1/f) noise generated by an IC voltage reference can prove difficult. In theory, adding a lowpass filter to a reference's output reduces noise. In practice, a lowpass RC filter for suppression of noise frequencies below ...