STMicroelectronics VIPer17 Evaluation Board STEVAL-ILL017V1 STEVAL-ILL017V1 Fiche De Données

For further information contact your local STMicroelectronics sales office.

September 2008

Rev 1

1/4

4

Offline constant current LED driver based on the VIPer17

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Input voltage 220 VAC +/- 20%

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800 V avalanche rugged power section

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Provides 500 mA constant current for LED

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High precision constant current with +/- 5% 
tolerance (1 sense resistor and 2 resistor 
bridges with +/- 1% precision)

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Overtemperature protection

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LED open-circuit protection

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LED short-circuit protection

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PWM operation with frequency jittering for low 
EMI

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Operating frequency:

– 60 kHz for L type

– 115 kHz for H type

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Standby power < 50 mW at 265 VAC

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Adjustable and accurate overvoltage 
protection

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On-board soft-start

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Safe auto-restart after a fault condition

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Adapters for PDAs, camcorders, electric 
shavers, cellular phones, videogames

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Auxiliary power supply for LCD/PDP TVs, 
monitors, audio systems, computers, industrial 
applications

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SMPS for set-top boxes, DVD players/
recorders, white goods

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 

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.