Blog – LPema

What Is an Analog Power Supply?

High frequency transformers enable compact, efficient energy transfer in electronics. This guide explores their applications in EVs, renewable energy, chargers, and industrial systems, along with design considerations and future trends.

Oct 7, 2025

Transformer Design Failure Case Study: Insulation Wire Crossing and Solder Damage

This article presents a real-world case study of a transformer design failure caused by insulation wire crossing and solder overheating. Although functional tests passed at the factory, the flaw surfaced under high-temperature load conditions, resulting in failures after 60,000 units were produced. The article explains the technical reasons behind the failure, outlines methods to detect hidden insulation damage, and highlights key lessons for transformer and power supply engineers to prevent similar costly mistakes.

Sep 23, 2025

Transformers and Inductors in LED Power Supplies

With proper design and core material selection, LED drivers can achieve both high efficiency and reliability. In future articles, we will explore how these magnetic components are applied in other types of power systems.

Sep 18, 2025

Top Chinese SMD High Frequency Transformer Manufacturers

This article introduces the top Chinese SMD high frequency transformer manufacturers, including LREO, Sunlord, Mentech, Jinlai, and Boulder. These companies are recognized for their technical expertise, quality assurance, and strong market reputation.

Sep 9, 2025

Pinhole Test for Enamelled Wires: Application in the Dual 85 Test

Pinholes Test for Enameled Wire: Application in Double 85 Experiment

In transformer manufacturing and enameled wire quality control, the pinhole test is one of the most practical and effective methods for detecting insulation defects.

Sep 2, 2025

Why GaN and Planar Transformers Are Revolutionizing Phone Chargers

Why GaN and Planar Transformers Revolutionize Fast Charging

In the field of power electronics, transformers are essential for voltage conversion and electrical isolation. Depending on their operating frequency, they can be classified into low-frequency (power) transformers and high-frequency transformers.

Aug 23, 2025