PI power conversion IC maximizes power efficiency across the entire load range

pi-topswitch-jxSan Jose, Calif. — Power Integrations, a manufacturer of high-voltage ICs for energy-efficient power conversion, has launched the highly integrated TOPSwitch-JX family of 16 power conversion ICs that incorporate a 725-V power MOSFET for use in flyback power supplies.

The TOPSwitch-JX multi-mode control algorithm maximizes power efficiency across the entire load range. High efficiency at full power minimizes power wasted during normal operation and reduces the complexity and expense of thermal management on the system, while At low-power levels, high efficiency enables adapters with extremely low no-load consumption and maximizes power available to the system in standby mode for applications constrained by standards and regulatory controls, said Power Integrations.

The devices are also said to deliver excellent light-load efficiency and low power consumption in the no-load condition thanks to a novel multi-cycle modulation mode that 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. The TOPSwitch-JX devices can easily achieve standby power consumption below 100 mW (for a 20 mW load) at 264 Vac.

Power Integrations also increased the breakdown voltage to 725 V. “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,” said David New, product marketing manager at Power Integrations, in a statement.

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.

The series 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.

Availability: Now in the eDIP and eSIP-7C heat-sink-mounted TO-220 replacement package.
Pricing: $0.78 and $1.69 each in quantities of 10,000.

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