PI launched two single stage power factor correction LED driver IC

For high voltage integrated circuit industry high efficient power conversion leader Power Integrations today announced the launch of two for solid state lighting (SSL), the application of single stage power factor correction support TRIAC dimming LED driver IC. They are LinkSwitch-PH (suitable for the design of isolated power supply (LinkSwitch-PL) and suitable for the design of non isolated power supply), both of which can be achieved without blinking monolithic TRIAC dimming, achieve lighting effects similar to incandescent lamp.

LinkSwitch-PH and LinkSwitch-PL series are integrated single stage power factor correction (PFC), so that the power factor of the SSL lighting can reach more than 0.9. The primary side control technology is used in the LinkSwitch-PH device, so it can be omitted from the traditional flyback design commonly used optocoupler and many auxiliary components. Non isolated LinkSwitch-PL design can further reduce the number of components, not only can improve the reliability of the system, but also can reduce the bill of material costs (BOM). The two devices use a single series of design - controller and MOSFET are integrated into a single chip, it can reduce the number of components and eliminates the parasitic elements between the controller and the power of MOSFET, so it can greatly simplify the PCB layout. These new LinkSwitch products can not only simplify the design of flyback power supply, but also can improve its efficiency, and can work in input voltage up to 305 VAC, the single voltage products so that they can be used in various kinds of global development suitable for residential and commercial lighting applications and general input products.

The service life of the LED is expected to reach more than 50000 hours in the range of the manufacturer's specified temperature and drive current. The weakest link in the LED lighting system is the drive circuit, because it is often involved in unreliable optocoupler and parasitic capacitance. LinkSwitch products in the use of the Power Integrations unique precision primary side control technology can be omitted optocoupler. Moreover, the new LinkSwitch LED driver IC family does not require the use of large capacity parasitic capacitors. Designers in the use of LinkSwitch-PL and LinkSwitch-PH design SSL products, it can be predicted that the working life of the driver and the precise control of the LED array.

Power Integrations lighting business development manager Bill Weiss said: these two new product lines are very suitable for the design of the replacement of the space limited LED driver. LinkSwitch-PH series of products designed for isolated power supply, its rated output power up to 50 watts, so it is very suitable for external LED ballasts commonly used design downlight, architectural lighting, outdoor lighting and signage. These two devices can reduce the number and size of BOM devices in the power system, thereby enhancing the reliability of the system. These IC will enable designers to improve the efficiency of the system, to meet or even exceed all the regulatory standards, including energy star and EN61000-3-2. "

LinkSwitch-PH device samples can now be halogen free, in line with the requirements of the eSIPa-7C package ROHS supply, the price of 10000 orders between $1.18 and $1.71 per piece. LinkSwitch-PL IC will be available in August 2010 and will be available in compact SO-8 and eDIP -12 packages.