IC manufacturers Texas Instruments

IC manufacturers (99)

Texas Instruments LM25017 | Demoboard RD006

3W Isolated Bias Supply for Communication Interfaces and Measurement Systems

Overview

TopologyBuck Converter
Input voltage18-32 V
Output 15.19 V / 0.3 A
Output 24.93 V / 0.3 A
Output 35.25 V / 0.3 A
IC revisiona

Description

This reference design presents an auxiliary supply with two output voltage rails of 5 V, galvanically-isolated from each other, with a combined maximum output power of up to 3 W (i.e. 0.3 A output current per rail). Tightly regulated, lower voltage rails like 3.3 V, 2.5 V or 1.2 V can be easily obtained by cascading a low-dropout linear voltage regulator (a.k.a. LDO) to the required output rail. The design targets applications like isolated communication interfaces and data acquisition systems, as well as many systems using sensors, voltage-level-shifters, digital isolators, or opto-couplers, amongst others.

Features

  • Extremely compact (20 x 20 x 5.3) (L x W x H) (mm)
  • Wide input voltage range from 18 to 32 V
  • Primary output voltage: 5.1 V ± 1%
  • Secondary output voltage (balanced load): 4.8 V ± 5%
  • Secondary output voltage (unbalanced load): 4.8 V ± 10%
  • Output power up to 3 W
  • Peak efficiency of 82 %
  • LM25017 IC Controller (Texas Instruments)
  • WE-TDC-HV Coupled Inductor with 2 kV Isolation
  • Buck converter with additional isolated output topology

Typical applications

  • 3W Isolated Bias Supply
  • Sensor and actuator systems
  • Isolated Signal and Communication Interfaces

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingOperating TemperatureL1
(µH)
L2
(µH)
nIR
(A)
IR 2
(A)
ISAT1
(A)
ISAT2
(A)
RDC1 typ
(mΩ)
RDC2 typ
(mΩ)
RDC1 max
(mΩ)
RDC2 max
(mΩ)
fres 1
(MHz)
Samples
885342208024SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSMH Mid and High Voltage1 nF ±10% 2000 1206 -55 °C up to +125 °C 2.510 GΩ X7R Class II 3.2 1.6 1.6 0.6 7" Tape & Reel -55 °C up to +125 °C
885012206087SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 50 V(DC)4.7 nF ±10% 50 0603 2.510 GΩ X7R Class II 1.6 0.8 0.8 0.4 7" Tape & Reel -55 °C up to +125 °C
885012206065SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 25 V(DC)10 nF ±10% 25 0603 3.510 GΩ X7R Class II 1.6 0.8 0.8 0.4 7" Tape & Reel -55 °C up to +125 °C
885012206095SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 50 V(DC)100 nF ±10% 50 0603 35 GΩ X7R Class II 1.6 0.8 0.8 0.4 7" Tape & Reel -55 °C up to +125 °C
885012206121SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 50 V(DC)330 nF ±10% 50 0603 -55 °C up to +125 °C 101.5 GΩ X7R Class II 1.6 0.8 0.8 0.4 7" Tape & Reel -55 °C up to +125 °C
885012207023SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 10 V(DC)1.5 µF ±10% 10 0805 50.3 GΩ X7R Class II 2 1.25 1.25 0.5 7" Tape & Reel -55 °C up to +125 °C
885012209048SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 50 V(DC)4.7 µF ±10% 50 1210 50.02 GΩ X7R Class II 3.2 2.5 2.5 0.6 7" Tape & Reel -55 °C up to +125 °C
885012208019SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 10 V(DC)22 µF ±10% 10 1206 100.005 GΩ X7R Class II 3.2 1.6 1.6 0.5 7" Tape & Reel -55 °C up to +125 °C
76889440330SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-TDC HV SMT Coupled Inductor 250 8038 -40 °C up to +125 °C 8 8 3.8 -40 °C up to +125 °C 33 33 1:1 0.85 0.85 1.85 1.85 575 575 640 640 14
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
H
(mm)
Fl
(mm)
PackagingOperating TemperatureL1
(µH)
L2
(µH)
nIR
(A)
IR 2
(A)
ISAT1
(A)
ISAT2
(A)
RDC1 typ
(mΩ)
RDC2 typ
(mΩ)
RDC1 max
(mΩ)
RDC2 max
(mΩ)
fres 1
(MHz)
Samples