Texas Instruments MSPM0L1306/TPS60403 | Demoboard MSPM0L1306

Description

This application note describes three designs of isolated low power supplies for 2-wire loop powered 4 to 20mA field transmitters or sensors, which are all based on primary side half-bridge topology and secondary side Schottky rectification. The design 1 is using a switching frequency of 50kHz and providing the best in class efficiency, which is available on ti.com as TIDA-00349. The design 2 focuses on optimizing the board space with operating switching frequency of 250kHz and using the customized low size transformer. Furthermore, the design 3 provides maximum of flexibility in terms of switching frequency up to 500kHz by using MSPM0 to generate two channels of PWM (Pulse Width Modulation) signals. This application note describes the design 3 in detail.

Typical applications

• Industrial automation

More information

• Datasheet
• IC product information