LC5581AS
LC5581AS is 1 Converter High Power Factor LED Driver ICs manufactured by Sanken.
Description
Package
The LC5581AS and LC5581LS are quasi-resonant LED driver ICs. The ICs can also operate in PWM mode. The ICs support isolated and non-isolated buck circuits and buck-boost converters.
The ICs provide the systems that can ply 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 ICs employ 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 ICs can provide more costeffective power supply systems with fewer external ponents.
Features
- 800 V High Voltage Built-in Startup Circuit
- Analog Dimming Function
- High Power Factor by Average Current Control
- Soft Start Function
- Shorter Time from Startup to LED Lighting
- P 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/ Auto-restart
VSOP16
Not to scale
Selection Guide
- Specifications
Gate Drive Output Voltage, VDRV = 8.2 V DRV Pin Output Impedance, RDRV(SOURCE) = 45 Ω DRV Pin Input Impedance, RDRV(SINK) = 15 Ω
- Protection Operation
Part Number
Protection Operation
Auto-restart
Auto-restart
LC5581LS
Auto-restart Latched shutdown
Applications
- LED Lighting Equipment
- LED Bulbs
Typical Application F1
C1
C3 Q1
L1
D1
D2...
