NCP1612A3 Overview
In this mode, the circuit classically operates in Critical conduction Mode (CrM) when the inductor current exceeds a programmable value. When the current is below this preset level, the NCP1612 linearly decays the frequency down to about 20 kHz when the current is null. CCFF maximizes the efficiency at both nominal and light load.
NCP1612A3 Key Features
- Near-unity Power Factor
- Critical Conduction Mode (CrM)
- Current Controlled Frequency Fold-back (CCFF): Low Frequency
- On-time Modulation to Maintain a Proper Current Shaping in CCFF
- Skip Mode Near the Line Zero Crossing
- Fast Line/Load Transient pensation
- Valley Turn On
- High Drive Capability: -500 mA/+800 mA
- VCC Range: from 9.5 V to 35 V
- Low Start-up Consumption