Pulse Transformers

Part Number	Description / PDF	Quantity
T5008NLT PulseLarsen Antenna	XFRMR ISDN-S 1:1/1:1 22MH SMD	164
T1176NLT PulseLarsen Antenna	MODULE INTERFACE 1CT:2.4CT SMD	0
TX1472NL PulseLarsen Antenna	XFRMR OCTAL 1:2.4/1:1 1.2MH SMD	156
23Z356SMFNLT PulseLarsen Antenna	PULSE XFMR 1CT:1.414CT 1CT:1CT	0
PE-65848FNL PulseLarsen Antenna	PULSE XFMR 1CS:1CS TX/RX	200
T9021NL PulseLarsen Antenna	XFRMR 4PORT 1:2.42 0.6MH SMD	0
PA1367NLT PulseLarsen Antenna	PULSE XFMR 66.1UH	0
HXU6200NLT PulseLarsen Antenna	XFRMR MAGNETIC 1PORT 1GIG MED	186
PA1279NLT PulseLarsen Antenna	XFRMR 3.3V 3W 310UH POE EP7 SMD	0
PE-68023NLT PulseLarsen Antenna	XFRMR LAN ISOL 1CT:2CT 10B-T SMD	0
BX1194WNL PulseLarsen Antenna	XFRMR SHDSL FOR INFINEON CHIPSET	0
PA1769NL PulseLarsen Antenna	PULSE XFMR 6.7UH	0
PA2649NLT PulseLarsen Antenna	PULSE XFMR 100.5UH	3000
PA1528ANLT PulseLarsen Antenna	PULSE XFMR 28.9UH	6000
PA2725NLT PulseLarsen Antenna	PULSE XFMR 139.5UH	0
PA2454NL PulseLarsen Antenna	PULSE XFMR 24UH	0
T3023NL PulseLarsen Antenna	TRANSFORMER 1:1 40UH SMD	0
HX6106NLT PulseLarsen Antenna	PULSE XFMR 350UH	0
H1121NLT PulseLarsen Antenna	XFRMR MAGNT 1PORT 1:1.414 10/100	245
PE-64943NL PulseLarsen Antenna	XFRMR T1/CEPT/ISDN-PRI 1CT:2CT	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