LinkSwitch AC/DC converter ICs increase current

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 LNK3207 AC/DC converter ICs increase the available current by 60% while also delivering greater than 80% efficiency and no-load consumption of less than 30mW. Each monolithic LinkSwitch-TN2 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, fast (cycle-by-cycle) current limit, hysteretic thermal shutdown, and output and input overvoltage protection circuitry.

The new LinkSwitch-TN2 ICs target mass-market appliances such as washers, dryers and coffee makers, which benefit from their design simplicity. They are also suitable for sensor-based devices that require low power such as home security cameras and smart thermostats, as well as metering and IoT installations. Devices are available in three packages, PDIP-8C, SMD-8C and SO-8C, for design flexibility. The SMD-8C package is ideal for high-temperature ambient 85/105°C applications.

LNK3207 AC/DC converter ICs are priced at $0.60 in volume product quantities. A new reference design, RDR-912 describes a 6.6 W non-isolated buck converter with 85VAC – 265VAC input and 12V, 550mA output built using the lowest possible component count.