iW1830 Off-Line Digital PWM Controller Renesas / Dialog iW1830 Off-Line Digital PWM Controller is a high-performance AC/DC power supply control device that uses digital control technology to build peak current mode PWM flyback power supplies. The device includes an internal power MOSFET, operates in a quasi-resonant mode, and includes key built-in protection features. This combination of features and integration simplifies design, improves efficiency, reduces EMI, and lowers the bill of material cost.