Data brief

For further information contact your local STMicroelectronics sales office.

February 2011

Doc ID 18457 Rev 1

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EVALHVLED805

4.2 W off-line LED driver with primary side regulation

Features

– Over voltage = 12 V max

normal mode: 70 kHz

(from 1 to 3 LEDs) > 70 %

Description

The EVALHVLED805 is a demonstration board

equipped with the new HVLED805 PWM current

mode LED driver and is designed for European

mains. It can control, with very good accuracy,

from 1 to 3 LEDs having a nominal current of 350

mA. The HVLED805 has integrated high voltage

startup and an 800 V power MOSFET. The high

MOSFET's breakdown voltage allows very robust

and reliable applications and reduces the size of

the snubber and the relative power dissipation. Its

accurate primary-current control eliminates the

need of the optocoupler which impacts the cost,

the compactness and the lifetime of the

application while still maintaining a very good

LED accuracy (below 5 %). Moreover, this

converter, specifically designed for quasi-

resonant (QR) flyback converters, enables very

low turn-on losses and EMI emissions.

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