Unique Squaroid Power Inductors Feature High Current Up to 20 amp Capacity
Designed for DC/DC Converters Powering the New Generation of Low-Voltage High-Current Microprocessors
biz.yahoo.com
SAN DIEGO--(BUSINESS WIRE)--July 18, 2001--Pulse announced four new surface-mount (SMT) power inductors for use with next-generation low-voltage, high-performance microprocessors.
These new devices require significantly higher power to operate, which in turn requires higher supply currents. With a maximum height of 0.280 inches (7.11mm), these compact, surface-mount power inductors are designed for low-profile DC/DC power converter applications. The unique squaroid-core design of these inductors has exceptionally low DC resistance that offers improved circuit efficiency and high-current capabilities.
The market demand for these SMT inductors is increasing as the new high-speed processors are incorporated into a myriad of computer-based products. The new processors run at higher frequencies at lower voltages (between 1.0 and 3.8 volts DC) and much higher current levels than previously.
The voltages must be stepped down from either the five or 12-volt bus found in desktop PCs or main servers, or from the six or 12-volt DC battery level of portable devices.
Pulse offers the industry's only flat-top, self-leaded design with a fixed clip, ideal for easy pick-and-place applications and higher current ratings. They are magnetically shielded for reduced electromagnetic interference (EMI).
Technical Information
The series is available in four inductance values -- 330, 470, 680 and 1,000 nH -- with DC resistance values of 0.74 milliohms (m(OMEGA)) TYP. Operating temperatures are -40(degrees)C to +125(degrees)C. Details are available on data sheet P525, located on Pulse's Web site at pulseeng.com.
Pricing and Availability
This line of SMT power inductors is available in tape-and-reel packaging. Pricing is $0.93 per unit in quantities of 100,000. Various volume discounts are offered.
About ``Squaroids''
In seeking to accommodate the need for a low-cost, low-inductance- value, high-DC-current-rated inductor in a compact, low-profile SMT package, engineers at Pulse have designed a custom-shaped ferrite core called a ``squaroid.'' The ``squarish'' or rectangular-shaped, single- piece core uses a single turn to create inductance and eliminate the need for a header or bobbin to accommodate windings and surface mount capability.
The use of a ferrite core minimizes core loss that can increase exponentially as switching frequencies increase toward 1 MHz. The single or two-turn design keeps copper losses to a minimum at a current rating of 20 amps DC. The design results in a highly efficient DC inductor with low profiles in the 0.125-inch to 0.280-inch range.
Called the VOLTA series, the squaroid-based inductors have been designed for use in DC-to-DC switch-mode power supplies. The VOLTA series will offer inductance values ranging from 100 nH to 1,000 nH with direct current (DC) ratings of 10 to 40 ADC for switching frequencies between 300 kHz and 2 MHz.
Although specifically designed for switching power supply output filters, a squaroid design can be successfully applied to any type of electronic filter, especially those requiring high-DC-current capability. Other applications include EMI, transmission line and signal processing filters up to 2 MHz.
About Pulse
With headquarters in San Diego, Pulse, a Technitrol (NYSE:TNL - news) company, has been an international leader in magnetic components for more than 40 years. The company, winner of Intel's coveted SCQI award, is one of the largest manufacturers of magnetic components in the world with a global reputation for technical excellence coupled with outstanding quality.
Pulse produces a complete line of passive magnetic components and modules for use in Internet/broadband access, power, telecommunications and datacom applications. Meeting the highest quality standards, the company has ISO 9000 registered manufacturing facilities located in the Far East, United States and Europe. Pulse's products are available through direct sales, as well as authorized distributors and representatives. |
