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SY5810*LED照明方案
General Description
The SY5810 is a single stage Flyback and PFC
controller targeting at LED lighting applications. It is a
primary side controller without applying any secondary
feedback circuit for low cost, and drives the Flyback
converter in the quasi-resonant mode to achieve higher
efficiency. It keeps the Flyback converter in constant
on time operation to achieve high power factor.
Features
·Primary side control eliminates the opto-coupler.
·Valley turn-on of the primary MOSFET to achieve
low switching losses
·0.3V primary current sense reference voltage leads
to a lower sense resistance thus a lower conduction
loss.
·Internal high current MOSFET driver: 0.25A
sourcing and 0.5A sinking
·Low start up current: 15μA t*ical
·Reliable short LED and Open LED protection
·Power factor >0.90 with single-stage conversion.
·Compact package: SOT23-6
Applications
·LED lighting
·Down light
·Tube lamp
·PAR lamp
·Bulb
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矽力杰
SY5810
SOT23-6
2013+