PFC Controllers work with power supplies.
Press Release Summary:
Fixed-frequency, current-mode NCP1653 drives continuous conduction mode boost converters with power needs from 100 W to 3 kW. It can also operate with output voltage tracking input voltage, called follower boost. Designed for PFC boost circuits in power ranges up to 300 W, NCP1601 operates in fixed-frequency discontinuous conduction mode and/or variable frequency critical conduction mode. Both devices are offered in PDIP-8 and SO-8 packages.
Original Press Release:
ON Semiconductor Strengthens Power Solutions Leadership Position with Compact, Innovative Power Factor Correction Controllers for Wide Range of Power Supplies
With the introduction of the NCP1653 and NCP1601, ON Semiconductor now offers the industry's widest power range of PFC solutions to meet the growing demand for higher efficiency and lower cost
Applied Power Electronics Conference (APEC), Austin, TX - March 7, 2005 - Continuing to provide power supply manufacturers with innovative ways to reduce both standby and active power consumption, ON Semiconductor (Nasdaq: ONNN) today introduced two new power factor correction (PFC) controllers designed for use in power supplies with input levels between 75 watts (W) and several kilowatts (kW). The new NCP1653 and NCP1601 controllers are ideal for power factor correction in power supplies found in televisions, flat-screen monitors, PC desktop and notebook adapter SMPS, off-line battery chargers and white goods such as refrigerators, washers and dryers.
The Devices
The NCP1653 is a fixed-frequency, current-mode PFC controller designed to efficiently drive continuous conduction mode (CCM) boost converters with mid-to-high power needs (100 W to 3 kW). In addition to the usual fixed-output voltage operation, it can also operate with the output voltage tracking the input voltage, called follower boost. In spite of its simplicity (8-pin package), it includes many of the features found in more complex controllers: Average current-mode or voltage-mode control, soft-start, Vcc undervoltage lockout with hysteresis, undervoltage, overvoltage and overpower protection and thermal shutdown with hysteresis.
The NCP1601 is a controller designed for PFC boost circuits in the lower power ranges (up to 300 W). It operates in either fixed-frequency discontinuous conduction mode (DCM) and/or variable frequency critical conduction mode (CRM) and takes advantage of the best features of both modes. In DCM it can be synchronized to an external frequency source or set at a fixed frequency. As the load and line conditions cause it to approach the continuous conduction mode, the output drive is delayed to cause it to operate in CRM (operating frequency now becomes variable). In both cases, the usual challenges of the recovery (soft turn-off) of the PFC diode are avoided, component stresses are reduced, along with the attendant costs. Filtering requirements are simplified and light load efficiency is improved as a result of limiting the maximum frequency.
Packaging and Price
Both the NCP1653 and the NCP1601 are offered in compact PDIP-8 and SO-8 packages. The NCP1653 is priced at $0.66 per unit in 10,000 unit quantities. The NCP1601 is priced at $ 0.36 per unit in 10,000 unit quantities.
A Power Solution Leader
With the introduction of NCP1601 and NCP1653, ON Semiconductor now offers the widest range of PFC solutions to meet the rapidly-emerging efficiency goals and the input harmonic limits of IEC1000-3-2. These solutions cover a full power range from 50 W to several kW and cater to various PFC topologies. Distinguishing the company's devices are innovative features such as follower boost option that allows reduction in PFC stage losses and component sizes, robust protection features including input power limiting and availability of complete design-in tools including easy-to-use design aids downloadable from the company's web site. The design software for these devices makes it possible to turn out a working circuit design, including stress analysis of key components, in a matter of minutes.
APEC - Applied Power Electronics Conference
At APEC, ON Semiconductor (Booth 209) will demonstrate its complete ATX power supply solution featuring harmonic reduction circuitry to deliver a superior efficiency compared to the traditional designs. This system far exceeds the efficiency requirements of the 80plus program (80plus.org) and also provides a more compact, less bulky and quieter power supply solution that can be appreciated by the end consumers. The high efficiency is achieved by topology improvements and choice of advanced components such as NCP1653 for power factor correction front-end, NCP1280 for active clamp SMPS converter and NCP1014 for the standby power supply. In addition, the post-regulation for the 3.3 V is achieved by using the soon-to-be-released NCP4330 post regulator.
About ON Semiconductor
With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor (Nasdaq: ONNN) 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 website at www.onsemi.com.
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 website in this news release, such information on the website is not to be incorporated herein.
