PE4201 and PE4301 are two Power Factor Controller ICs which improve the power factor of switch mode power supplies from about 0.5 to almost 1. Whenever federal laws or circuit power efficiency or a reduction in harmonic balances force you to use PFC you can use our products.

Key differentiators to other products in the market are

• 10x less operating power
• 5x less shunt resistor power loss
• High accuracy of internal reference