EVALHVLED805 Datasheet, PDF (1/9 Pages) STMicroelectronics – 4.2 W off-line LED driver with primary side regulation

EVALHVLED805
4.2 W off-line LED driver with primary side regulation
Data brief
Features
■ Input voltage range (V_IN): 185 - 265 V_AC
■ Main frequency (f_L): 50 - 60 Hz
■ Maximum (rated) output power: 4.2 W
■ Output: I_OUT = 350 mA ± 5%
– Over voltage = 12 V max
– Current ripple < 10% I_OUT
■ Minimum switching frequency in
normal mode: 70 kHz
■ Target average efficiency
(from 1 to 3 LEDs) > 70 %
■ Maximum input power in no-load < 100 mW
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.
February 2011
Doc ID 18457 Rev 1
For further information contact your local STMicroelectronics sales office.
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