News

Home  -  News  -  Industry News

Main circuit part (not including transformer design)

source:Industry News Popular:adapter release time:2021-06-29 09:40:33 Article author:sznbone

  After the rectifier filter circuit is the main circuit of the flyback power adapter, the main tasks that need to be done are the determination of the switching frequency, the design of the transformer, the selection of switching tube parameters and the selection of the maximum duty cycle, the selection of the output rectifier and the output filter capacitor.

Main circuit part (not including transformer design)(图1)

  In order to reduce costs, most of the switching tubes choose 600V rated voltage. For the flyback power adapter with output 60W, the switching tube will withstand a peak current of about 2A. Considering that the 600V MOSFET on-resistance is relatively large, especially in the state of high junction temperature. With a relatively large current margin, it is a better choice to consider the IRFBC40 (600V/6A/1.20) grade MOSFET from the perspective of easy procurement.

  The output rectifier needs to withstand voltage not less than 90V withstand voltage. You can choose a Schottky diode with a withstand voltage of 120V. If you can choose an ultra-fast reverse recovery diode in order to reduce costs, you can choose a withstand voltage of 200V, so the selected voltage margin is relatively large. If you choose BYQ28X-200 (some brands can offer a price of 0.45 yuan), this model can withstand a voltage of 200V and a rated rms current of 14A. It can meet the design requirements.


Read recommendations:

18W Chinese Standard

OEM 90w ac to dc switching power supply circuit on bare board

36W Chinese standard

Reliability index of switching power supply adapter

New reference suggestions for EMI suppression measures in adapters

Previous:12V power adapter control loop part Back to list Next:Selection and analysis of main components of power adapter

The latest article

Related Products

The latest article

2003-2004

2025-03-25

2004-2006

2025-03-25

2006-2008

2025-03-25

2009-2011

2025-03-25

2012-2014

2025-03-25

2014-2017

2025-03-25

2018-2022

2025-03-25

2022-2024

2025-03-25

2024-2025

2025-03-25

What are the types of mobile phone chargers and their functions?

2022-05-21

Advantages of switching power adapters

2022-05-21

Five core functions that the power adapter can achieve.adapter manufacture

2022-05-20

Analysis of the importance of power adapters for notebooks.adapter Processor

2022-05-20

Details of switching power supply in maintenance

2022-05-19

Understand the precautions of the power adapter and be an expert in electricity safety

2022-05-19

This is how the EMC interference of the switching power supply is generated.adapter wholesaler

2022-05-18

The relationship between the nominal voltage and current of the power adapter.power adapter price

2022-05-18

Five basic functions of notebook power adapters.adapter wholesaler

2022-05-17

Lightning surge immunity test method.power adapter price

2022-05-17

Switching power supply ripple source and control

2022-05-16

Level 6 energy efficiency standard power adapter T series

2022-05-16

Children sleeping with pacifiers are prone to tooth decay

2022-05-16

Six methods to deal with the heating problem of switching power supply transformer

2022-05-14

The principle of flyback switching power supply

2022-05-14

Types of thermal protection for power adapters.adjustable power adapter

2022-05-13

Summary of common faults of LED switching power supply

2022-05-13

The power transistor should be used like this in the power adapter

2022-05-12

4 modulation methods of switching power supply

2022-05-12

Some little knowledge about switching power supply

2022-05-11

Laptop Power Adapter Troubleshooting Steps

2022-05-11