iW1679-50 Description
iW1679-50 Off-Line Digital Green-Mode Quasi-Resonant PWM Controller 1.0.
iW1679-50 Key Features
- Optimized for 5V2A AC/DC adapters/chargers with < 30mW no-load power consumption at 230VAC and fast dynamic load respons
- Direct drive of low-cost BJT power switch
- Very tight constant voltage and constant current regulation over entire operating range
- PrimAccurateTM primary-side feedback eliminates opto-isolators and simplifies design
- EZ-EMI® design enhances manufacturability
- Intrinsically low mon mode noise
- Optimized 72kHz maximum PWM switching frequency achieves best size and efficiency
- Adaptive multi-mode PWM/PFM control improves efficiency
- Quasi-resonant operation for highest overall efficiency
- Dynamic base current control