Power Integrations
has released an 92% efficient LED streetlight
power supply reference design. For
streetlights up to 150W, the supply has a fixed output voltage of
48V at up to 3.125A.
Central to the circuit is the firm's HiperPLC chip, aimed at
converters between 80 and 600W, which combines power factor
correction (PFC) and a resonant (LLC, inductor inductor capacitor)
down converter on the same die.
"The IC provides up to 0.99 power factor and features
synchronisation of PFC and LLC controllers," said the firm.
"Synchronisation reduces the ripple in the bulk capacitors, which
reduces capacitor operating temperature and significantly extends
the life of the power supply."
The paperwork includes detailed instructions for constructing
the crucial transformer. For more information see
www.powerint.com/applications/led-lighting
See also: Electronics Weekly's roundup of content
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