OBSOLETE

LC5547LF

Package Image

Package : TO220F-7L

RoHS : YES

Data Sheet(836KB)

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.

Data Download

Design Support

  • Technical Documents

Technical Documents

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 650 V
On-Resistance 1.10 Ω
Output Power / Output current 55W
OCP Pulse by pulse
OLP Latch
OVP Latch
LED Open / Short Protection NO
Dimming Function Analog
Package Weight (Typ.)
Automotive Qualified

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Questions or Comments?

Please feel free to contact us if you cannot find the desired product from the lineup.