Fluorescent Lamp Control IC Does Dimming with Only 8 Pins

Designing Dimming Circuits for Fluorescent Lamps is a challenging task typically realized using a complex, high-pin-count control IC. Compared with non-dimming...

Slope Compensation with Negative Resistance Improves PWM Operation

Pulse-width-modulation (PWM) duty cycles above 50% require a compensating ramp called slope-compensation to avoid instability. With traditional slope-compensation...

AC Power Testing Presents Many Challenges and Concerns

Testing products designed to operate from ac power is not as simple as one might think. Consider a factory with the straight-forward need to manufacture...

Power-Factor Analysis For A Cable-fed Single Electric Motor

Why is Power Factor important? The phase relationship between the ac-power-line voltage and current is related by a term called power factor. For a purely...

Resonant DC-DC Converter Boasts High Power and Wide Load Range

Depending on the type of regulation they use, step-down dc-dc converters usually fall into two groups: fixed frequency with pulse-width modulation (PWM)...

Compensating the RHPZ in a CCM Boost Converter: the analytical way

In the previous article, we derived the origins of the right-half-plane-zero (RHPZ) and discovered how it could affect converter dynamics. If we know...

PoE PD Power SoC Manages Remote Device Power

A powered-device controller IC for PoE systems has four on-chip dc-dc converters plus a high-voltage, high-speed isolation barrier interface that allows it to manage both primary and isolated secondary power....

Trivial Electronics: How Much Do You Know?

On May 13, 2009, the IEEE celebrated more than a century of innovation and ingenuity as it officially turned 125 years old. To include the readers of...

New products

Synchronous Buck Converter with 12-A Quiescent Current CAPABLE OF up to 100 mA of continuous output current, the LTC3631 synchronous buck converter from...

Kentucky, Argonne partner to help build domestic battery industry

The Commonwealth of Kentucky, the University of Kentucky (UK) and University of Louisville (U of L) are partnering with Argonne National Laboratory to...

Registration Opens for Plug-In 2009 Conference & Exposition

Looking for an Opportunity to learn about the latest technological advances, market research and policy initiatives shaping the future of plug-in hybrid...

Study Shows Chips can Cut Energy Consumption

Aggressive adoption of new technologies for the production, distribution and use of electricity could lower total U.S. energy consumption by 2030, according...

Quad PSE Controller IC Meets IEEE 802.3at (PoE+) and IEEE802.3af (PoE)

Linear Technology's LTC4266 is a four-port Power over Ethernet (PoE) controller IC for power-sourcing equipment (PSE) that can provide IEEE 802.3at (25.5 W) and proprietary higher power levels....

POWER electronics

PRESS PACK POWER SEMICONDUCTOR MODULE Issued May 26, 2009U.S. Patent 7,538,436Gunturi, et al. The high-power pack semiconductor module comprises a layer...