iW1706
Overview
The iW1706 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.
- Primary-side feedback eliminates optoisolators and simplifies design
- Quasi-resonant operation for highest overall efficiency
- Adaptively controlled soft start-up enables fast and smooth start-up for a wide range of capacitive loads (from 330μF to 6000μF)
- Very tight constant voltage regulation
- EZ-EMI® design enhances manufacturability
- Intrinsically low common mode noise
- Optimized 72kHz maximum PWM switching frequency achieves best size and efficiency
- Adaptive multi-mode PWM/PFM control improves efficienc
