STEVAL-ILL017V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Offline constant current LED driver based on the VIPer17

STEVAL-ILL017V1
Offline constant current LED driver based on the VIPer17
Data Brief
Features
■ Input voltage 220 VAC +/- 20%
■ 800 V avalanche rugged power section
■ Provides 500 mA constant current for LED
■ High precision constant current with +/- 5%
tolerance (1 sense resistor and 2 resistor
bridges with +/- 1% precision)
■ Overtemperature protection
■ LED open-circuit protection
■ LED short-circuit protection
■ PWM operation with frequency jittering for low
EMI
■ Operating frequency:
– 60 kHz for L type
– 115 kHz for H type
■ Standby power < 50 mW at 265 VAC
■ Adjustable and accurate overvoltage
protection
■ On-board soft-start
■ Safe auto-restart after a fault condition
Applications
■ Adapters for PDAs, camcorders, electric
shavers, cellular phones, videogames
■ Auxiliary power supply for LCD/PDP TVs,
monitors, audio systems, computers, industrial
applications
■ SMPS for set-top boxes, DVD players/
recorders, white goods
STEVAL-ILL017V1
VDC source, suitable for illuminating two LEDs in
series.
The VIPer17 device is an offline converter with an
800 V rugged power section, a PWM control,
overcurrent protection, overvoltage and overload
protection, hysteretic thermal protection, soft-start
and safe auto-restart after the removal of a fault
condition. The brown-out protection function is
embedded into the high voltage start-up.
Burst mode operation and the very low
consumption of the device combine to meet
standby energy saving regulations. Advanced
frequency jittering reduces EMI filter cost.
Description
The STEVAL-ILL017V1 demonstration board is a
2 W non-isolated offline constant current LED
driver based on the VIPer17. The board operates
with an input ranging from 176 V to 264 VAC and
provides 500 mA of constant current from a 7
September 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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