Description

The IRS2505L is a control IC for PFC boost converters operating in critical-conduction mode. The IC incorporates a voltage feedback loop for output voltage regulation combined with smart zero crossing detection to control the gate drive output without the need for a secondary inductor winding. DC output over-voltage protection and cycle-by-cycle over-current protection are also included. Multi-functional inputs enable the IRS2505L to perform all functions with only 5 pins.

Features

● Critical-conduction mode PFC control (CrCM)

● High PF and ultra-low THD

● Wide line and load range

● Regulated DC output voltage

● No secondary winding required

● Cycle-by-cycle over-current protection

● Output over-voltage protection

● Ultra-low start-up current

● 20.8V internal zener clamp on VCC

● Excellent ESD and latch immunity

● RoHS compliant

● 5-pin SOT-23 package

Applications

● Off-line power supply

● Electronic ballast

● LED power supply