Product category:
Power Supply ICs and Controllers
News Release from: ON Semiconductor | Subject: NCP1651
Edited by the Electronicstalk Editorial
Team on 21 March 2006
PFC controller enables frugal notebook
PSU design
ON Semiconductor has unveiled a GreenPoint reference design for 90W notebook computer power adapters.
ON Semiconductor has unveiled a GreenPoint reference design for 90W notebook computer power adapters Employing a single-stage approach, this reference design eliminates the burden of implementing two power processing stages
This article was originally published on Electronicstalk on 3 Nov 2003 at 8.00am (UK)
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"This reference design extends our leadership position of advanced power management semiconductors for efficient notebook power adapters", said Andy Williams, Vice President of ON Semiconductor's Power Conversion Products Division.
"ON Semiconductor's expertise in high-efficiency power design was used to develop this fully tested notebook adapter solution that can be easily implemented by OEMs intent on delivering energy-efficient end products to the market".
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The new GreenPoint adapter reference design delivers 90% energy efficiency.
Using a proprietary single-stage topology, the design requires far fewer components than traditional two-stage approaches.
The reference design meets original equipment manufacturers' skin temperature requirements and leakage current requirements of less than 100uA.
To reduce output ripple and maintain harmonic currents within the class D requirements as specified by IEC1000-3-2, the reference design utilises a dual loop ripple/power-factor optimisation technique developed by Energy Recovery Systems Corp - a technology and product development company partnering with ON Semiconductor on the innovative adapter reference design.
The enabling device for the reference design is the NCP1651, an active power factor correction controller designed for operation over the universal input range (85-265V AC) in 50/60Hz power systems.
It provides a low-cost, low-component count solution for isolated AC/DC convertors with mid-high output voltage requirements and eases the task of meeting the IEC1000-3-2 harmonic requirements for convertors in the range of 50-250 W.
The NCP1651 uses a proprietary multiplier design, enabling significantly more accurate operation versus conventional analogue multipliers.
The device is offered in an SOIC-16 package and priced at $1.82 per unit in 2000-unit quantities.
A documentation package for the adapter reference design is available - including description, block diagram, specifications and evaluation results.
ON Semiconductor and Energy Recovery Systems Corp (ERS) established a formal, co-operative relationship that will continue to enable the delivery of cost-effective high-efficiency power supply solutions to the market.
ON Semiconductor chose ERS as a partner for power system designs and some joint development activities, in the area of adapters and computing power, based on ERS' power supply design expertise.
ERS chose ON Semiconductor as a strategic partner for silicon solutions, based on ON Semiconductor's leadership in developing superior power management integrated circuits.
"By taking a proprietary design approach, we were able to overcome the shortcomings of single-stage topology, and directly address the specific requirements for notebook power adapters", said Abdul Sher-Jan, President of Energy Recovery Systems.
"Together with ON Semiconductor, we worked closely with key customers and focused on the critical performance parameters".
"The result has been the successful development of a low-cost single-stage solution that delivers the required performance, with lower design complexity as compared with more complex and more common two-stage approaches".
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