Pulse Transformers

Part Number	Description / PDF	Quantity
PA1136NL PulseLarsen Antenna	PULSE XFMR 126.7UH	0
H5007NL PulseLarsen Antenna	MODULE SINGLE GIGABIT LAN 24SOIC	2284
P5008NL PulseLarsen Antenna	PULSE XFMR 1:0.07:0.07	0
HX5201NL PulseLarsen Antenna	XFRMR MODL 2PORT POE GIGABIT	0
TTER09-0458S1 Mentech Technology USA Inc.	POWER TRANSFORMER	0
DGL1553-45 PulseR (iNRCORE	TRANSFORMER MODULE INTERFACE	57
PB2089NL PulseLarsen Antenna	PULSE XFMR 112UH	0
VST10/9EE-205S1C2 TDK Corporation	CURRENT SENSE TRANSFORMERS, WOUN	485
B8849NL PulseLarsen Antenna	PULSE XFMR ADSL ETSI-A	0
ALAN-101-T Abracon	LAN XFRMR 10/100 1PORT EXT-TEMP	1047
T1212NL PulseLarsen Antenna	XFRMR 1CT:1CT/1CT:2CT 1.20MH SMD	2
ILR-11-0003 Schurter	ILR3 IMPULSTRAFO KONVENTIONELL	50
GDE25-3 Triad Magnetics	TRANSF .350 OHM SINGL GATE DRIVE	22
78613/8MC-R Murata Power Solutions	PULSE XFMR 1CT:1 1MH	0
GDE25-4-B Triad Magnetics	TRANSF .650 OHM DUAL GATE DRIVE	2916
PA1134NLT PulseLarsen Antenna	XFRMR 5V 7W 253UH POE EP10 SMD	1084
T1212NLT PulseLarsen Antenna	XFRMR 1CT:1CT/1CT:2CT 1.20MH SMD	280
PG1096.823NLT PulseLarsen Antenna	PULSE XFMR 73.5UH	0
23Z467SM PulseLarsen Antenna	PULSE XFMR 1CT:2CT TX 1CT:1CT RX	230
SM91502ALE J.W. Miller / Bourns	BMS XFORMER 1-CH 1000V AECQ +125	3790

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