OBSOLETE
LC5549LF
Package:TO220F-7L
The LC5540LF series is the power IC for the isolated typevLED driver which has an incorporated power MOSFET,
designed for input capacitorless applications, and making it possible for systems to comply with the harmonics standard(IEC61000-3-2 class C),
even during light load condition.
The controller adapts the average current control methodfor realizing high power factors, and the quasi-resonant topology contributes to high efficiency and low EMI noise. The rich set of protection features helps to realize low component counts, and high performance-to-cost power supply.
Design Support
Related Documents
- ■Application Note
Features
-
・Integrated on-time control circuit
・Integrated start-up circuit
・Integrated soft-start circuit
・Integrated bias assist circuit
・Integrated Leading Edge Blanking (LEB) circuit
・Integrated maximum on-time limit circuit
・Protection functions
Overcurrent protection (OCP): Pulse by pulse
Overvoltage protection (OVP): latch shutdown
Overload protection (OLP): latch shutdown
Thermal shutdown (TSD): latch shutdown
Application
-
・LED lighting equipment
Ceiling lights
Down lights, etc
Specifications
Type | |
---|---|
Circuit Type | Flyback |
Isolated / Non-Isolated | Isolated |
MOSFET Breakdown Voltage | 800 V |
On-Resistance | 1.70 Ω |
Output Power / Output current | 40W |
OCP | Pulse by pulse |
OLP | Latch |
OVP | Latch |
LED Open / Short Protection | NO |
Dimming Function | Analog |
Package Weight (Typ.) | g |
Block Diagram
Pin Configuration Definitions
Questions or Comments?
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