Isolated interface solution

The bundle of a SN6501 transformer driver from Texas Instruments (US) together with Wuerth Elektronik’s (Germany) WE-PP Push-Pull transformers is one of the smallest solutions for isolated interface designs according to the company.

THE BUNDLE IS SUITABLE FOR THE USE OF CAN as well as other interface designs with need for isolation or isolated DC/DC converter designs. The transformer driver comes in a 5-pin SOT23 housing. It is a monolithic oscillator/power-driver that was designed for small form factor, isolated power supplies in isolated interface applications. It drives a low-profile, center-tapped transformer primary from a 3,3 V (150 mA) or 5 V (350 mA) power supply. The secondary can be wound to provide isolated voltage based on the transformer turns ratio.

The transformer driver consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive the ground referenced N-channel power switches. The so-called internal logic ensures break-before-make action between the two switches. This device is specified for operation at temperatures from -40 °C to 125 °C. And application fields are industrial automation, process control or medical equipment.