Free PFC power supply design reference from Power Integrations

Power Integrations has published a new design example report DER-274 based on its HiperPFS family describing a 900-watt power supply with 97%-efficient active power factor correction (PFC) to passive PFC solutions for white goods, blowers, computers/servers, power supplies, and motor control drives.

Power Integrations explains the HiperPFS family of PFC controllers incorporates a continuous conduction mode (CCM) boost PFC controller, gate driver, and high-voltage power MOSFET in a single, low-profile eSIP package and it is suitable for PFC applications from 85 W to 1 kW, employs a control scheme that optimizes efficiency over the entire load range of the converter, particularly at light loads. This variable-frequency control technique also reduces EMI filtering requirements due to its wide-bandwidth, spread-spectrum effect and comparing with designs that use discrete MOSFETs and controllers, as per Power Integrations.

Power Integrations says the power supply detailed in DER-274, based on HiperPFS part number PFS729EG, is a general-purpose, high-efficiency evaluation platform that operates from 180 VAC to 264 VAC input and provides a regulated 380 VDC output voltage and a continuous output power of 900 W at 25ºC. HiperPFS ICs include Power Integrations' standard set of comprehensive safety features, such as integrated soft-start, undervoltage, overvoltage, brown-in/out, and hysteretic thermal shutdown protection. HiperPFS also provides cycle-by-cycle current limit for the power MOSFET, power limiting of the output for over-load protection, and pin-to-pin short-circuit protection.

Comments Edward Ong, product marketing manager at Power Integrations: "The HiperPFS family stands apart from competing PFC solutions for the high efficiency and high power factor that can be achieved across the load range, as well its ease of use and low external parts count. Designers of white goods, blowers, and water pump applications can use HiperPFS to meet high power factor and line harmonic standards."

For more information visit: www.powerint.com