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Texas Instruments MSPM0L1306/TPS60403 | Demoboard MSPM0L1306
Isolated Loop Powered 4 to 20mA Field Transmitter Designs
Overview
| Topology | Half-Bridge Converter symmetrical isolated |
| Input voltage | 1.62-3.6 V |
| Output 1 | 0.01 A |
| IC revision | 1.0 |
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
Products
Order Code | Datasheet | Downloads | Status | Product series | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-PHD Pin Header - Single, 2, Straight | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins2 | TypeStraight | MountTHT | Length5.08 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header - Single, 4, Straight | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins4 | TypeStraight | MountTHT | Length10.16 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header - Single, 6, Straight | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins6 | TypeStraight | MountTHT | Length15.24 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | 750314839 | Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Transformer | – | – | MountSMT | Length9.78 mm | Height10.54 mm | – | – | Operating Temperature -40 °C up to +100 °C |