Are We Focused On The Wrong Reference Parameters?

Designing a reliable circuit that employs a voltage reference requires a more detailed look at device parameters than most data sheets provide....

Flyback Controller IC Integrates Power Factor Correction

By integrating power factor correction capability into a flyback controller IC, the circuit complies with the IEC 61000-3-2 Harmonic Current Emissions Standard for equipment up to 100 W. The IC also meets the Energy Star requirements for a power factor of at least 0.9 and efficiency over 82%. ...

No Heatsink Needed for 200-W Buck-Boost Supply

A common problem power-supply designers face is how to generate an output that, at any time, can be above or below the input, particularly in battery-powered systems...

The Parallel Universe of Negative-Input Voltages

Difficulty arises when a negative-input voltage must be used as the input source for a dc-dc converter...

Power Management Bus (PMBUS)

As explained by the Power Management Bus Implementer's Forum, The Power Management Bus (PMBus) is an open standard power-management protocol with a fully...

Step-Down DC/DC Controllers Employ PMBus Functions to Enhance System Performance

A PMBus interface provides digital power management for dual output, high efficiency synchronous step-down DC/DC controller ICs...

Suite Of Efficient Power Supply Products Includes GreenChip PFC and SR Controllers

NXP Semiconductors unveiled a suite of new power management solutions that will reduce power consumption in desktop PCs and laptops for the mass market...

Over-Voltage Protection Device with USB/Charger-Detection Simplifies Design

Fairchild Semiconductor offers designers of cell phones, mobile audio, computer and consumer applications a highly integrated over-voltage protection (OVP) with USB/charger-detection...

Ultra-High-Precision Z-Foil Surface-Mount Flip Chip Voltage Divider

Vishay Intertechnology, Inc. announces that it has enhanced its VFCD1505 surface-mount flip chip voltage divider with an almost instantaneous thermal stabilization time of < 1 second...

Adjustable Overvoltage Protector with High Accuracy

Maxim's MAX14527/MAX14528 overvoltage protection ICs feature 100mohm (typ) RON internal FET and protect low-voltage systems against voltage faults up to +28V...