Complete range of switcher ICs with integrated 900V MOSFETs

摘要

Power Integrations' suite of offline switcher ICs incorporating 900V primary MOSFETs include ICs for high-efficiency isolated flyback power supplies and for simple non-isolated buck converters. The new products include 900V versions of the LinkSwitch-TN2 ICs for simple, nonisolated buck converters plus three new members of the flagship InnoSwitch3-EP IC family, which enable high-efficiency isolated flybacks up to 35W. All members of the 900V product families feature internal control engines optimized for high efficiency across load, enabling designs to easily meet energy-related products (ErP) limits, and a variety of line and load protection mechanisms to further enhance system robustness and reliability. The 900V LinkSwitch-TN2 ICs deliver low component count switcher solutions for buck converters. Devices feature selectable current limit and fully integrated auto-restart for short-circuit and open-loop protection. The use of frequency jittering greatly reduces EMI, and devices meet high-voltage creepage and clearance requirements between DRAIN and all other pins both on the PCB and at the package. The 900V InnoSwitch3-EP flyback switcher ICs provide lossless line OVP sensing, which automatically interrupts switching when line voltages exceed a selected threshold, preventing damage to the power supply during severe line overvoltage situations. Devices achieve efficiencies of up to 90% across line and load conditions, reducing power supply losses and resulting in compact power supplies up to 35W without heatsinks. The 900V InnoSwitch3-EP ICs employ Power Integrations' isolated digital communications technology, FluxLink, plus synchronous rectification (SR), QR switching and a precise secondary-side feedback sensing and control circuit. This results in efficient, accurate, reliable power supply circuits without the need for unreliable optocouplers.