Power Integrations’ New TOPSwitch-JX Power Conversion IC Family Enables 85 mW No-Load

Excellent light-load efficiency and low power consumption in the no-load condition are facilitated by a novel multi-cycle modulation mode, which reduces the average switching frequency while minimizing output ripple and audible noise. This allows designs to easily meet stringent new efficiency specifications, such as ENERGY STAR® and the EC EuP Ecodesign Directive, while maintaining a stable output voltage. Standby power consumption below 100 mW (for a 20 mW load) at 264 VAC is easily achieved using TOPSwitch-JX.



David New, product marketing manager at Power Integrations, comments: “In addition to enhancing light-load operating efficiency, we have also increased the breakdown voltage to 725 V in this latest generation TOPSwitch device. This improves system reliability and allows operation with a high reflected voltage, which reduces the secondary diode cost in many designs. The new IC also incorporates a fast AC-reset circuit, which significantly reduces the number of primary-side components required.”



TOPSwitch-JX is available in the new low-profile eDIP package, which is optimized for outstanding heat dissipation in slim-form-factor applications such as LCD monitors, TVs, and netbook/notebook adapters. The device is also well suited for printers, PC and TV standby, set-top boxes, and other consumer audio/video equipment requiring up to 177 W of power with a universal input voltage range.



The TOPSwitch-JX family is available now, priced between $0.78 and $1.69 each for 10,000-piece quantities. In addition to the thermally efficient eDIP package, the device is also available in PI’s popular eSIP®-7C heatsink-mounted TO-220 replacement package. Comprehensive safety features include over-temperature, over-current, over-power, line over-voltage, line under-voltage, and user-selectable latching/non-latching output over-voltage protection with fast AC reset.