ACTIVE
LC5581LS
Package：VSOP16
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.
Design Support
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 | V |
| On-Resistance | Ω |
| 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 |
Typical Application
Block Diagram
Pin Configuration Definitions
Physical Dimensions
Questions or Comments?
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