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reference designTPS60403

Texas Instruments TPS60403

Isolated Loop Powered 4 to 20mA Field Transmitter Designs

Overview

TopologyHalf-Bridge Converter symmetrical isolated
Input voltage18-52 V
Switching frequency50-500 kHz
Output 10 A
Output 20.02 A

Description

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

Features

  • Inverts Input Supply Voltage
  • Up to 60-mA Output Current
  • Only Three Small 1-µF Ceramic Capacitors Needed
  • Input Voltage Range From 1.6 V to 5.5 V
  • PowerSave-Mode for Improved Efficiency at LowOutput Currents (TPS60400)
  • Device Quiescent Current Typical 65 µA
  • Integrated Active Schottky-Diode for Start-up Into Load
  • Small 5-Pin SOT-23 Package
  • Evaluation Module Available TPS60400EVM-178

Typical applications

  • GaAs Bias for RF Power Amps
  • Battery-Operated Equipment
  • Medical Instruments
  • Sensor Supply in Portable Instruments, Bipolar Amplifier Supply

More information

Products

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Order Code
Data­sheet
Downloads
Status
Product series
Pins
Type
Mount
L(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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61300211121
SPECWR-PHD Pin Header - Single, 2, Straight
Availability
–
Downloads7 files

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
–Check availability
61300411121
SPECWR-PHD Pin Header - Single, 4, Straight
Availability
–
Downloads7 files

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
–Check availability
61300611121
SPECWR-PHD Pin Header - Single, 6, Straight

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Availability
–
Downloads7 files

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
–Check availability