Pulse Transformers

Part Number	Description / PDF	Quantity
HX1188NLT PulseLarsen Antenna	XFRMR MAGNETIC 1PORT 1:1 10/100	6212
E2457NL PulseLarsen Antenna	XFRMR ISOL 10BASE-T 1:1.41 SMD	0
76601/3C Murata Power Solutions	XFRMR 1:1 219UH 5.5VUS B	300
BX1194WNLT PulseLarsen Antenna	XFRMR SHDSL FOR INFINEON CHIPSET	2967
749014011 Würth Elektronik Midcom	TRANSFORMER WE-LAN MED 10/100BT	460
H1605DG Mentech Technology USA Inc.	SINGLE LAN XFMR 10/100 BASE-T	20
PA1283NLT PulseLarsen Antenna	XFRMR 5V 7W 155UH POE EP10 SMD	277
B82804A0324A220 TDK EPCOS	PULSE XFMR 2:1:1 317UH	541
PE-65723NL PulseLarsen Antenna	TRANSFORMER 2000VRMS 75UH SMD	756
HX6098FNL PulseLarsen Antenna	PULSE XFMR 1 CT:1CT TX/RX 120UH	1575
HX5020NL PulseLarsen Antenna	MODULE DL GIGABIT ETHER LAN 48P	973
78615/4C Murata Power Solutions	PULSE XFMR 1CT:1CT 67UH	75
10GB-6010NL PulseR (iNRCORE	LAN MODULE XFRMR 10GBASE-T SMD	0
P0584NL PulseLarsen Antenna	PULSE XFMR 1:1:1 450UH	1959
YLTH96402U Trigon Components	PULSE TRANSFORMER LAN 2.5G/5G	0
HX2326FNLT PulseLarsen Antenna	PULSE XFMR 1CT:1CT TX/RX	1755
H5015NLT PulseLarsen Antenna	TRANSFORMER MODULE GIGABIT 1PORT	703
H0019NL PulseLarsen Antenna	MODULE PC CARD SNGL LAN 16PCMCIA	558
78604/1C Murata Power Solutions	PULSE XFMR 2:1 2MH	0
PA1692NL PulseLarsen Antenna	PULSE XFMR 73UH	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

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