Products, Materials & Tools | Apr 10, 2009

LED Streetlight Driver Solution

The PR788 component from Texas Instruments is a 100W offline AC to DC LED current driver with power factor correction. This design is a two stage converter item with a universal input boost PFC stage providing a 240V to 400V DC output and a low side buck stage providing the current source to power the LED’s.

This product was designed to support up to 30 high brightness LED’s in series up to 900mA average current. The design incorporates interface for microprocessor control to allow for shutdown into a low power mode (<0.5W) and PWM dimming of the LED’s.

The PFC stage is a critical conduction mode boost converter with a boost follower feature implemented. The boost follower is set to provide a DC output of 240V to 400V. The lower DC output at low input voltage results in improved efficiency at low line conditions Vs a fixed 400V output. The minimum regulation point was set at 240V to allow the design to be scaled to power up to 50 LED’s in series. The Golden Dragon OVAL LEDs from OSRAM providing already a optimized light output through their OVAL beam pattern. For the best thmermal management DK Thermal produced the MCPCBs based on Laid technolgies T - LAM material. The result is a homogenous streetlighting illumination with a high application efficiency.

tony2010electronic says: (on Nov 24, 2010 10:17 AM)
Dear Sir,
We have LED lights with UL, CE and RoHs on spot lamp, light bulb, down light and high bay light.
JIESEN LED LIGHTING is a China-based company selling high quality LED lighting products produced by our select partners who are professional lighting manufacturers at country.
We are committed to providing quality, sustainable products that are a direct replacement for incandescent, halogen and CFL bulbs and fixtures. LED lights are solid state, non-toxic, contain zero mercury and are environmentally friendly, so LEDs are clearly a far better choice to cut energy costs and to be safe to the environment.
Should you have any problems, concerns or issue, please feel free to contact us or email us.
Thank you.
Best Regards.
Tony (Sales Representative)
Tel: 86-0757-82783242 Fax: 86-0757-82783240
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