iW1676
Overview
The iW1676 is a high performance AC/DC power supply controller which uses digital control technology to build peak current mode PWM flyback power supplies. The device directly drives a power BJT and operates in quasi-resonant mode to provide high efficiency along with a number of key built-in protection features while minimizing the external component count, simplifying EMI design and lowering the total bill of material cost.
- No-load power consumption < 30mW at 230VAC with typical application circuit (5-star rating)
- Fast dynamic load response for both one-time and repetitive load transients
- Very tight constant voltage and constant current regulation over entire operating range
- Primary-side feedback eliminates optoisolators and simplifies design
- 64kHz PWM switching frequency
- Ultra-low start-up current (1.7μA typical)
- EZ-EMI TM design enhances manufacturability
- Intrinsically low common mode noise
- Adaptive multi-mode PWM/PFM control improves efficiency
- Quasi-resonant operation for highest overall efficiency
