Printer Friendly

ON Semiconductor Introduces GreenPoint(TM) CRT-TV Power Supply Reference Design That Delivers Low Standby Power; New 160-Watt Power Supply Solution Delivers Standby Power of Less Than 1 Watt.

SHENZHEN, China -- A leading global supplier of power management solutions, ON Semiconductor (NASDAQ: ONNN) today unveiled a GreenPoint(TM) reference design for CRT-TV power supplies that delivers standby power of less than 1 watt (W). This energy-efficient 160 W reference design addresses all functional blocks of the power supply and meets international regulations for low standby power dissipation.

"We developed, built and fully tested this CRT-TV power supply reference design to further demonstrate ON Semiconductor's ability to help deliver industry-leading power efficient consumer products to the market," said Andy Williams, vice president of ON Semiconductor's Power Conversion Division. "When developing this design -- and all our GreenPoint(TM) power solutions -- we worked closely with our worldwide customers to assure the creation of effective solutions that directly address present and future power needs. ON Semiconductor plans to continue to deliver 'green' solutions that ease the design burden on our customers for power supplies that are more and more efficient."

The Reference Design

To achieve breakthrough performance, the new CRT-TV GreenPoint(TM) reference design utilizes a number of ON Semiconductor's advanced power management devices and draws from the company's industry-leading discrete component portfolio.

The enabling device for the reference design is the newly introduced NCP1337, an enhanced Pulse Width Modulation (PWM) current-mode controller that eases the design of free running quasi-resonant power supplies such as those found in CRT-TVs. It combines a true current-mode modulator and a demagnetization detector -- that ensures full borderline/critical conduction mode in any load/line. The device eliminates the need for an external signal, by providing internal transformer core reset detection. Frequency is internally limited to 130 kilohertz (kHz) to facilitate the compliance with EMI conducted emission standards, the lowest limit being 150 KHz.

By monitoring the feedback pin activity, this controller enters ripple mode as soon as the power demand falls below a pre-determined level. The standby power of a 160 W CRT TV can be reduced to less than 1 W, while adapter no load consumption can match the most strengthens requirements. Because restart is softened by an internal soft-start and the frequency cannot fall below 25 kHz, no audible noise is emitted.

The NCP1337 features an efficient protective circuitry that, in the presence of an overcurrent condition, disables the output pulses and enters a safe burst mode when trying to restart. Once the default has gone, the device auto-recovers and the power supply resume operation.

Additional features include a bulk voltage monitoring function known as brown-out protection, an adjustable overpower compensation that tackles the effect of the input voltage variation on the maximum power a quasi-resonance PSU can deliver, and an Over Voltage Protection on the Vcc. An internal 4.0 millisecond (ms) soft-start eliminates the traditional startup stress.

The NCP1337 is ideal use in power supplies in CRT-TVs, notebook AC-DC adapters, offline battery chargers, other consumer electronics such as DVD players and set-top boxes, and any power supply where efficiency and low EMI signature are needed.

The device is offered in both an SOIC-7 and a PDIP-7 package and priced at $1.04 per unit in 2,500 unit quantities.

Supporting devices include the:

--TL431 -- a three-terminal programmable shunt regulator diode.

--MC78L05 -- an inexpensive, easy-to-use positive voltage regulator suitable for applications that require a regulated supply of up to 100 milliamps (mA).

--MUR420 and MUR460 -- 200 volt (V) and 600 V 4 Amp (A) ultrafast SWITCHMODE(TM) power recitifiers.

--BS108 -- a 200 V 250 milliamps (mA) small signal, logic level MOSFET.

--BC547 -- an NPN silicon amplifier transistor.

A complete documentation package for the CRT-TV power supply is available -- including description, schematic, bill-of-materials, Gerber images, and evaluation results. These materials are available at, as are the product specifications and other supporting information.

About GreenPoint(TM)

GreenPoint(TM) is ON Semiconductor's family of high-efficiency power supply reference designs that meet existing or emerging energy efficiency standards. GreenPoint(TM) reference designs include ATX power supply, CRT-TV power supply and the soon-to-be debuted Flat Panel TV power supply. For documentation package for these designs visit and do a keyword search of "GreenPoint."

About ON Semiconductor

With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the computer, cell phone, portable devices, automotive and industrial markets. For more information, please visit ON Semiconductor's Web site at

ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its Web site in this news release, such information on the Web site is not to be incorporated herein.
COPYRIGHT 2006 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2006, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Publication:Business Wire
Date:Mar 10, 2006
Previous Article:Enzo Biochem Schedules Teleconference to Discuss Second Quarter Results for Tuesday March 14, 2006, at 9:00 AM E.T.
Next Article:Fitch Assigns Northern Rock's Covered Bonds Expected 'AAA' Rating.

Related Articles
Must we pull the plug? New program aims to cut the juice drawn by leaky appliances.
Ultra Clean.
Vampire appliances. (Energy).
ON Semiconductor Introduces a GreenPoint(TM) Reference Design for Notebook Power Adapters; the New 90-Watt Power Adapter Solution Delivers 90 Percent...
ON Semiconductor Introduces its Fourth GreenPoint(TM) Power Supply Reference Design -- Again Delivering Profound Energy Efficiency.
ON Semiconductor Wins Best Power Product Awards for NCP1337, NCP1603 and NIS5102 from a Leading Electronics Magazine in China; Awards Underscore ON...
NEC Electronics and NEC Introduce High-k CMOS Technology Delivers Both Low Standby Power Consumption and High Operating Speeds; New 55nm Platform for...
ON Semiconductor Delivers GreenPoint(TM) ATX Reference Design That Exceeds New ENERGY STAR(R) Efficiency Standards for Desktop Computers.
ON Semiconductor Introduces Resonant Mode Controller for Reliable, Highly Efficient Switch Mode Power Supplies.

Terms of use | Copyright © 2017 Farlex, Inc. | Feedback | For webmasters