Fly back Synchronous Rectification Problems and Countermeasures

2023-04-05

In recent years, with the continuous improvement of international energy efficiency standards, conventional Schottky diode rectifiers cannot meet the energy efficiency requirements of low-voltage and high-current output specifications (DoE Level VI in the United States, CoC V5 Tier 2 in the European Union); even with ultra-low Vf Xiao For the rectification of special base diodes, some heat sinks need to be added, which will lead to large PCB space, low power density, low efficiency, high shell temperature, and poor user experience.

Technical Papers

Safety distance requirements

2022-11-17

In the standard of GB4943, the minimum safety distance required according to different working voltage levels is specified, and the safety distance specifies two types of creepage distance and electrical clearance. For the switching power supply, there are the following two aspects where the minimum safety distance needs to be guaranteed.

Technical Papers

Management application of medical power supply in various fields--Patient Monitoring

2022-07-01

Such systems are all clinical systems. They are used to measure blood pressure, but can also be used in electrocardiogram (ECG) and pulse oximeter systems. This type of power management usually uses line power, so as long as heat dissipation can be handled well, energy efficiency is not a big issue. What is really important is reliability, galvanic isolation for safety purposes, and low noise. To increase reliability, backup batteries are sometimes provided.

Technical Papers

Wireless charging technology and principle

2022-03-23

In recent years, technologies related to smartphones have become more and more mature, and the technological achievements they have brought are constantly attracting attention. Just recently, a technology called wireless charging that was first used by the famous Nokia lumia920 has widely aroused peoples curiosity and attention, and people think it is a very magical function and technology.

Technical Papers

Introduction of fully integrated isolator

2022-02-03

All isolated DC/DC power converters include input filters, output filters, transformers, primary switches, secondary rectifiers and a controller. The controller can refer to either the primary ground or the secondary ground.

Technical Papers

Two common hot-swappable surge current control schemes

2021-12-17

In the usual design and development work, engineers often use hot-swappable surge current control circuits for filtering and charging current limitation. In view of the design requirements, it is also very important to reasonably choose the control scheme of the hot-swappable surge circuit. In todays article, we will show two common hot-swappable surge current control solutions for new engineers who have just started to work on power supply design. Lets take a look.

Technical Papers