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Pulse Transformers

Image Part Number Description / PDF Quantity Rfq
1000B-5001

1000B-5001

PulseR (iNRCORE

TRANSFORMER MODULE SMD

0
TQ1553-71

TQ1553-71

PulseR (iNRCORE

TRANSFORMER 1553-71 PBC

0
T-1250SCT

T-1250SCT

PulseR (iNRCORE

XFMR DUAL 1250M BAUD

753
FPQT1553-8

FPQT1553-8

PulseR (iNRCORE

TRANSFORMER PBC

0
QT1553-81

QT1553-81

PulseR (iNRCORE

TRANSFORMER PBC

0
SMG1553-63

SMG1553-63

PulseR (iNRCORE

TRANSFORMER 1553 SINGLE PBC

0
10GB-6013XT

10GB-6013XT

PulseR (iNRCORE

LAN MODULE XFRMR 10GBASE-T SMD

0
QT1553-1

QT1553-1

PulseR (iNRCORE

TRANSFORMER PBC

0
FPQC1553-7

FPQC1553-7

PulseR (iNRCORE

TRANSFORMER PBC

0
Q1553-5

Q1553-5

PulseR (iNRCORE

TRANSFORMER PBC

0
X-1569T

X-1569T

PulseR (iNRCORE

XFMR GATE DRIVE 1500VDC ISO

452
FPQ1553-10

FPQ1553-10

PulseR (iNRCORE

TRANSFORMER PBC

0
DTLN1553-45

DTLN1553-45

PulseR (iNRCORE

TRANSFORMER PBC

0
QC1553-85

QC1553-85

PulseR (iNRCORE

TRANSFORMER PBC

0
Q1553-20

Q1553-20

PulseR (iNRCORE

TRANSFORMER PBC

108
10GB-6011T

10GB-6011T

PulseR (iNRCORE

LAN MODULE XFRMR 10GBASE-T SMD

0
Q1553-85

Q1553-85

PulseR (iNRCORE

TRANSFORMER PBC

0
QC1553-83

QC1553-83

PulseR (iNRCORE

TRANSFORMER PBC

0
FPQC1553-10

FPQC1553-10

PulseR (iNRCORE

TRANSFORMER PBC

0
R1035NLT

R1035NLT

PulseR (iNRCORE

XFRMR ETHERNET MOD IND 10/100BTX

0

Pulse Transformers

1. Overview

Pulse transformers are specialized electromagnetic devices designed to transfer electrical pulse signals between circuits while maintaining galvanic isolation. They play a critical role in modern electronics by enabling efficient signal transmission, voltage level conversion, and noise suppression. Their unique ability to handle fast transient signals makes them essential in power electronics, telecommunications, and industrial control systems.

2. Main Types and Functional Classification

TypeFunctional FeaturesApplication Examples
Signal Pulse TransformerHigh bandwidth, fast rise time (ns level), low distortionDigital communication interfaces (RS485, Ethernet)
Power Pulse TransformerHigh voltage isolation (>1kV), high efficiency (>90%)Switch-mode power supplies (SMPS), motor drives
High-Voltage Pulse TransformerMulti-kV insulation, partial discharge resistanceX-ray generators, radar systems
Wideband Pulse TransformerFrequency range: 100kHz-100MHz, flat response curveRF amplifiers, test equipment

3. Structure and Components

Typical construction includes:

  • Primary/secondary windings: Enamelled copper wire with precise turn ratio
  • Magnetic core: Ferrite (high permeability), powdered iron (high saturation)
  • Insulation system: Multi-layer dielectric barriers, vacuum pressure impregnation
  • Termination: Surface-mount pads or through-hole pins

Advanced designs use planar transformers with PCB-integrated windings for improved thermal management.

4. Key Technical Parameters

ParameterTypical RangeImportance
Turns Ratio1:1 to 1:100Voltage scaling accuracy
Frequency Range100kHz-10MHzSignal integrity maintenance
Isolation Voltage500V-30kVSafety compliance (UL/IEC)
Pulse Rise Time1ns-50nsDigital signal fidelity
Leakage Inductance<1 HEfficiency optimization

5. Application Fields

  • Power Electronics: Isolated gate drivers for IGBT/MOSFET
  • Telecommunications: DSL line interface units
  • Medical Equipment: Patient-isolated monitoring systems
  • Industrial Control: PLC signal transmission
  • Automotive: EV battery management system (BMS) isolation

Case Study: In electric vehicle chargers, pulse transformers enable 1500V isolation between grid and battery systems while maintaining 98% signal integrity at 2MHz switching frequency.

6. Leading Manufacturers

ManufacturerKey Product SeriesSpecifications
CoilcraftPulse-Hi Series1:1.4 ratio, 25kV isolation, 100MHz bandwidth
Pulse ElectronicsPA1538NL1:16 ratio, 3kV isolation, 100ns rise time
TDK-LambdaCUT1002.5kV isolation, 2MHz frequency, SMD package

7. Selection Guidelines

Key considerations:

  • Match turns ratio with driver/receiver voltage requirements
  • Verify insulation class against system safety standards
  • Check frequency response vs. signal bandwidth requirements
  • Consider thermal rating for continuous power operation
  • Evaluate PCB footprint constraints (through-hole vs SMD)

8. Industry Trends

Current development directions include:

  • Miniaturization through nanocrystalline core materials
  • Integration with EMI filtering components
  • Increased operating frequencies (>10MHz) for 5G infrastructure
  • SiC/GaN compatible designs for wide bandgap power devices
  • Automotive-grade models for 800V EV systems
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