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LC5581LS

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Package : VSOP16

RoHS : YES

Data Sheet(712KB)
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The LC5581LS is a quasi-resonant LED driver IC.
The IC can also operate in PWM mode.
The IC supports isolated and non-isolated buck circuits and buck-boost converters.
The IC provides the systems that can comply with the harmonics standard (IEC61000-3-2 Class C) in all conditions, including a light load condition.
These systems, moreover, can be achieved by 1 converter system that requires no input electrolytic capacitor.
The IC employs the average current and quasi-resonant controls: the average current control realizes high power factors, whereas the quasi-resonant control contributes to high efficiency and low noise.
Having a rich set of protection features, the IC can provide more cost-effective power supply systems with fewer external components.

Data Download

Design Support

  • Technical Documents

Technical Documents

Features

    • 800 V High Voltage Built-in Startup Circuit
    • Analog Dimming Function
      • High Power Factor by Average Current ControlSoft Start Function
    • Shorter Time from Startup to LED Lighting
      – COMP Pin Fast Charging Function
      – Bias Assist Function that Includes Two Types that are Activated at Different Voltage Levels
      (Smaller Capacitance of the VCC Pin)
    • Standby Function
    • Leading Edge Blanking Function
    • Maximum On-time Limitation Function
    • Protections
      Overcurrent Protection (OCP): Pulse-by-pulse
      Overload Protection (OLP): Auto-restart
      Overvoltage Protection (OVP): Latched Shutdown

Application

  • LED Lighting Equipment
  • LED Bulbs

Specifications

Type Controller
Circuit Type Flyback
Isolated / Non-Isolated Non-Isolated
MOSFET Breakdown Voltage
On-Resistance
Output Power / Output current
OCP Pulse by pulse
OLP Auto Restart
OVP Latch
LED Open / Short Protection YES
Dimming Function Analog
Package Weight (Typ.) 0.07 g
Automotive Qualified NO

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Physical Dimensions

Physical Dimensions

Questions or Comments?

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