The Incredible Shrinking Power Supply: New IC Cuts AC Adapter Size
Sep 1, 2002
A new IC allows a switching topology that rivals the simplicity and low cost of linear adapters, enabling a smaller, lighter package of up to 75% efficiency with 3W output and <300mW at no load....
Filter Components Cut Emissions and Output Noise
Sep 1, 2002
A new power supply design uses a combination of chassis capacitors, non-inductive snubber resistors and an inductor to achieve 500mVp-p and 35 dB reductions in output noise and radiated emissions, respectively....
Supply ICs Boost Design Flexibility
Aug 1, 2002
The latest round of power supply ICs provide new features and better efficiency than their predecessors. Controller ICs provide multiple outputs, single-chip switchers handle higher loads, and charge pump devices deliver higher current....
Reducing Converter Stresses Part 2: Active Components
Jul 1, 2002
Part 2 covers converter stresses and plots functions for buck, boost, and buck-boost topologies. Active component losses include those related to on-resistance of the power switch and diode rectifier....
Analog/Linear ICs: Filling Important Roles
Jun 1, 2002
The increasing importance of more accurate energy measurement data and real-time access to that data is accelerating the acceptance of digital metering technology....
H-Bridge Power IC Drives DC Motors Up to 6A
Apr 1, 2002
An integrated motor drive power IC is space and power efficient with an architecture scalable to higher current levels. A fully protected dual high-side MOSFET power switch has an entire H-bridge control....
Multiple Voltage Systems Need Supply-Voltage Sequencing
Apr 1, 2002
Power-supply sequencing solves the problem of avoiding latch-up effects in ICs during power-up and power-down. Some new device features are available today, presenting various methods for achieving a defined sequencing cycle....
Battery-Based ICs Serve and Protect
Apr 1, 2002
The LX1741 from Microsemi Integrated Products is a compact, high-efficiency step-up boost controller that employs an external power MOSFET....
Analog and Mixed Signal ICs Fill Multiple Roles
Feb 1, 2002
We use analog ICs in many varied applications. The mixed signal devices described here include some digital circuits, which is characteristic of many of today's ICs that provide system functions....
DC-DC Converter IC Integrates On-Chip 6A MOSFET
Jan 1, 2002
With the core functionality of an entire dc-dc converter on-chip, a power IC addresses the needs of present and future lower voltage processors....
ICs Drive Motors, Regulate Voltage, and Protect Batteries
Jan 1, 2002
As IC manufacturers develop processing technologies allowing higher integration levels, they can double up on the functions included in a single package or shrink the package size....
