Pulse Transformers

Part Number	Description / PDF	Quantity
HX5224CNL PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 350UH	6
PA2467NLT PulseLarsen Antenna	PULSE XFMR 37UH	2564
H5008NLT PulseLarsen Antenna	MODULE GIGABIT LAN 24SOIC 1PORT	54
PA1297NL PulseLarsen Antenna	PULSE XFMR 380UH	0
H1199NL PulseLarsen Antenna	XFRMR MAGNETIC 1PORT 1:1 10/100	0
HM2103NLT PulseLarsen Antenna	XFMR CMC MODULE AECQ BATT MNGT	0
PA1835NLT PulseLarsen Antenna	PULSE XFMR 4.5UH	0
H6062NL PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT POE	2703
HX5014NL PulseLarsen Antenna	MODULE DL GIGABIT ETHER LAN 48P	312
PE-63388NL PulseLarsen Antenna	XFRMR MOSFET GATE DRIV 1:1.5:1.5	561
HM6098NL PulseLarsen Antenna	XFMR MDL 1000BASE-T SMT AEC-Q200	130
HU4009NL PulseLarsen Antenna	MODULE MAGNETIC SNGL 2.5GB SMT	0
HX5004NL PulseLarsen Antenna	MODULE SINGLE GIGABIT LAN 24SOIC	2405
H1126NL PulseLarsen Antenna	XFRMR MODULE 1PORT 1:2 10/100	0
HX5004ENL PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 350UH	290
TX1475NLT PulseLarsen Antenna	XFRMR OCTAL 1:2/1:1 1.2MH SMD	0
H5062NL PulseLarsen Antenna	XFRMR MODULE GIGABIT 1PORT 1:1	1395
HX1260NLT PulseLarsen Antenna	XFRMR MODULE 1PORT 1:1 10/100	3443
H1197NLT PulseLarsen Antenna	XFRMR MAGNT MOD 1PORT POE 10/100	908
H6096NLT PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX 1CT:1CT RX	1596

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

Type	Functional Features	Application Examples
Signal Pulse Transformer	High bandwidth, fast rise time (ns level), low distortion	Digital communication interfaces (RS485, Ethernet)
Power Pulse Transformer	High voltage isolation (>1kV), high efficiency (>90%)	Switch-mode power supplies (SMPS), motor drives
High-Voltage Pulse Transformer	Multi-kV insulation, partial discharge resistance	X-ray generators, radar systems
Wideband Pulse Transformer	Frequency range: 100kHz-100MHz, flat response curve	RF 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

Parameter	Typical Range	Importance
Turns Ratio	1:1 to 1:100	Voltage scaling accuracy
Frequency Range	100kHz-10MHz	Signal integrity maintenance
Isolation Voltage	500V-30kV	Safety compliance (UL/IEC)
Pulse Rise Time	1ns-50ns	Digital signal fidelity
Leakage Inductance	<1 H	Efficiency 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

Manufacturer	Key Product Series	Specifications
Coilcraft	Pulse-Hi Series	1:1.4 ratio, 25kV isolation, 100MHz bandwidth
Pulse Electronics	PA1538NL	1:16 ratio, 3kV isolation, 100ns rise time
TDK-Lambda	CUT100	2.5kV 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