Uprated AC/DC converter ICs increase available current by 60%

Power Integrations has announced a new member of its LinkSwitch-TN2 AC/DC converter family. The new LNK3207 ICs aids higher-power offline buck converter designs for appliances and industrial applications by extending the available output current from 360mA to 575mA while also decreasing BOM count.

Silvestro Fimiani, product marketing manager at Power Integrations, said: “These new LinkSwitch-TN2 ICs are pin-to-pin compatible with previous generations, making it simple for customers to upgrade to higher-power designs. A high-current buck converter can be created using a minimal number of easily available components while saving at least one diode over previous solutions.”

The ICs increase the available current by 60% while also delivering greater than 80% efficiency and no-load consumption of less than 30mW. Each monolithic IC incorporates a 725V power MOSFET, oscillator, on/off control for high efficiency at light load, a high-voltage switched current source for self-biasing, frequency jittering, hysteretic thermal shutdown, fast (cycle-by-cycle) current limit, and output and input overvoltage protection circuitry.

The new ICs target mass-market appliances such as washers, dryers and coffee makers, which benefit from their design simplicity. They are also ideal for sensor-based devices that need low power, such as home security cameras and smart thermostats, as well as metering and IoT installations. Devices are offered in three packages, PDIP-8C, SMD-8C and SO-8C, for design flexibility. The SMD-8C package is excellent for high-temperature ambient 85/105C applications.