PFC ICs Suitable for AC-DC Applications

International Rectifier (IR) has introduced a range of uPFC power factor correction (PFC) ICs for AC-DC applications including lighting, LCD/PDP TV and game-console switch-mode power supplies (SMPSs). The IR115x range of ICs is also suitable for fans, air conditioners and uninterruptible power supplies (UPSs) ranging from 300W to 8kW. The ICs, utilising IR's One Cycle Control (OCC) technology, offer a high power factor (PF), low total harmonic distortion (THD) and excellent DC bus regulation while reducing component count, PCB area and design time compared with traditional solutions.

The ICs are designed to operate in continuous conduction-mode Boost PFC converters with average current-mode control over an 85-264VAC input line voltage range. By integrating more features than traditional PFC solutions and eliminating the need for external implementation, the IR115x reduces the overall cost and complexity of a feature-rich PFC control design compared with traditional PFC solutions while offering enhanced protection and safety, according to the company. The uPFC ICs offer advanced system enabling and protective features including a dedicated pin for over-voltage protection, cycle-by-cycle peak current limitation, open-loop protection, VCC UVLO and programmable soft-start.

The user-initiated micro-power start-up/sleep mode enables compliance with standby power requirements mandated by regulations such as Energy Star, Green Power and Blue Angel. The IR1152S and IR1153S also feature brown-out protection. The IR1155S offers a programmable switching frequency between 48kHz and 200kHz based on the specific application requirement. The IR1152S and IR1153S offer a fixed switching frequency of 66kHz and 22.2kHz respectively.

The devices are compatible with IR's Ultrafast and Warp insulated gate bipolar transistors (IGBTs) for systems with power ratings higher than 750W and switching frequency up to 100kHz. The devices are lead free and RoHS compliant. Datasheets, an application note and an online design tool are available on the company's website. The IRAC1152-350W and IRAC1155-300W reference designs are also available.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more