IW1707

iW1707 Low-Power Off-Line Digital Green-Mode PWM Controller 1.0 Features 2.0 Description ●● Primary-side feedback eliminates opto-isolators and simplifies design ●● Adaptively controlled soft start enables fast and smooth start-up for a wide range of capacitive loads (from 330 μF to 6,000 μF) ●● Active start-up scheme enables shortest possible turn-on delay ●● Direct drive of low-cost BJT switch ●● Very tight constant voltage regulation ●● EZ-EMI ® design enhances manufacturability ●● Intrinsically low common mode noise ●● Optimized 72 kHz 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 ●● No external compensation components required ●● Complies with EPA 2.0 energy-efficiency specifications with ample margin ●● Built-in short circuit protection and output over...