Power Integrations released a complete range of switcher ICs with integrated 900V MOSFETs targeting 480 VAC industrial applications and appliance power supplies for regions with unstable mains voltage. Applications also include tropical regions where frequent lightning strikes or any area where high-energy ring-waves and surges are prevalent. The switcher ICs are for high-efficiency isolated flyback power supplies and for simple non-isolated buck converters.
The new product series comprises 900V versions of the LinkSwitch-TN2 ICs for simple, non-isolated buck converters plus three new members of the flagship InnoSwitch3-EP IC family, which enable extremely high-efficiency isolated flybacks up to 35 W. All members of the switcher ICs offer 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 feature the lowest-component-count switcher solutions for buck converters with 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 easily meet high-voltage creepage and clearance requirements between DRAIN and all other pins both on the PCB and at the package making it compact and space saving.
The 900V InnoSwitch3-EP flyback switcher ICs feature lossless line OVP sensing, which automatically interrupts switching when line voltages exceed a selected threshold which prevents damage to the power supply during severe line overvoltage situations. The InnoSwitch3-EP ICs offer efficiency level up to 90% across line and load conditions resulting in reduction of power supply losses in compact power supplies up to 35 W without heatsinks. The ICs comprise Power Integrations’ FluxLink, an innovative isolated digital communications technology, plus synchronous rectification (SR), QR switching and a precise secondary-side feedback sensing and control circuit. This leads in highly efficient, accurate, reliable power supply circuits without the need for unreliable optocouplers in power supplies.
Sample of all the switcher ICs are available where the 900V InnoSwitch3-EP ICs are priced at $1.18 for 10,000-piece quantities and the 900V LinkSwitch-TN2 ICs are priced at $0.60 for 10,000-pieces orders. Technical Support for all switcher IC family is available from the Power Integrations website.