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ON Semi unveils ref design for 220W LCD-TV

Posted: 29 Mar 2006     Print Version  Bookmark and Share

Keywords:GreenPoint  reference design  LCD-TV power supply  ON Semiconductor 

ON Semiconductor, a supplier of power management solutions, unveiled its third GreenPoint reference design—this one for 220W LCD-TV power supplies. Like the CRT-TV design ON introduced earlier in the month, this TV design is said to deliver standby power of less than 1W, addresses functional blocks of the power supply, and meets international regulations for low standby power dissipation.

This reference design utilises several of ON Semiconductor's products, namely NCP1395 and NCP5181.

The NCP1395 is a resonant mode controller that includes a 1MHz voltage controller oscillator and protections featuring various reaction times. This device is offered in an SOIC-16 package, priced at Rs.61.07 ($1.38) per unit in 2,500 unit quantities, and a PDIP-16 package, priced at Rs.66.38 ($1.50) per unit in 500 unit quantities.

The NCP5181 is a high voltage power MOSFET driver that provides two outputs to drive two negative-channel MOSFETs. It uses the "bootstrap" technique for the high-side power switch. This device is offered in an SOIC-8 package, priced at Rs.70.80 ($1.60) per unit in 2,500 unit quantities, and a PDIP-8 package, priced at Rs.77 ($1.74) per unit in 1,000 unit quantities.

Other key devices include the NCP1653 and NCP1027. The NCP1653 is a power-factor correction (PFC) controller that suits continuous conduction mode PFC applications like those found in flat-screen TVs. This device aims to reduce part count and provide a front-end without range switches. It device is offered in an SOIC-8 package, priced at Rs.35.40 (80 cents) per unit in 2,500 unit quantities, and a PDIP-8 package, priced at Rs.38.94 (88 cents) per unit in 1,000 unit quantities.

Meanwhile, the NCP1027 is a highly-integrated switch-mode power supply switcher. This device aims to provide improved efficiency at light loads by entering a skip cycle when power demand is low. It is offered in a PDIP-8 package, priced at Rs.42.04 (95 cents) per unit in 1,000 unit quantities.

Supporting devices include: TL431, a programmable precision reference; MBR10H100CT, a 100V, 10A, H-series switchmode power rectifier; MBRS260, a 60V, 2A, Schottky power rectifier; and MMSZ7V5E, a 225W, 7.5V, energy-rated Zener.

A complete documentation package for the LCD-TV power supply is available—including description, schematic, bill-of-materials, Gerber images and evaluation results.




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