source:Industry News Popular:adapter release time:2021-06-30 09:20:21 Article author:sznbone
Selection of input rectifier: In order to reduce the size of the power adapter, it is necessary to choose a rectifier bridge. In this power adapter, the parameters of the rectifier bridge are 4A, and 800V meets the requirements of the design book about the selection of input rectifiers.
The choice of input rectifier filter capacitor: The input rectifier filter capacitor without exception chooses electrolytic capacitors. In order to ensure high temperature life, 450V withstand voltage and 150F capacitance are selected, which conforms to the "rule" of 3~5F per watt.
The choice of switch tube: From the perspective of AC input minimum voltage of 85V and economical and practicality, the switch tube is selected 2SK2645, which is a 600V/A1.20 MOSFET, which is equal to IRFBC40 level 600V/6.2M1.20, but It is much more expensive than IRFHC40. It is characterized by a full plastic shell, which saves the insulation between the switch tube and the radiator.
Selection of output rectifier: Since the output voltage is 12V and the supply voltage is internationally accepted voltage level, the output rectifier chooses Schottky diodes, with a withstand voltage of 120V, a current of 30A, and a conduction voltage of 0.88V. The purpose of choosing 30A is to be large. Reduce the forward voltage of the output rectifier diode, such as from 0.8N under the rated current to about 0.4V of the 8A peak current to improve the efficiency of the power adapter.
The consideration of the large-scale derating selection of the switch tube and the output rectifier diode may be: referring to other advanced power adapter designs, in order to improve the reliability and efficiency of the power adapter.
Selection of output rectifier filter capacitor: The output filter capacitor chooses two 16V/10OF high-frequency low-resistance electrolytic capacitors in parallel, and then an LC filter circuit is set up. The electrolytic capacitor is a 16V/470F high-frequency low-resistance electrolytic capacitor.
Analysis of Power Adapter Transformer Data
Core: EC35, material 3C8. Under the condition of 40kHz, domestic power ferrite cores can meet the requirements.
Primary side: American Standard (AWG) No. 26 wire with 45 turns. The diameter of American Standard (AWG) No. 26 wire is 0.45mm, and the national standard 0.44 wire diameter can be used.
Secondary side: ±12V, 9 turns of American Standard No. 30 wire. The diameter of American Standard (AWG) No. 30 wire is 0.315mm, and the national standard 0.35 wire diameter can be used.
Secondary side: 5V, 6-strand American standard No. 26 4-turn wire in parallel.
Auxiliary power winding, American standard No. 30 wire, 10 turns.
The air gap is about 0.1in (2.54mm), corresponding to the primary side inductance lmH.
Read recommendations:
90~264V AC DC Switch Mode Power Supply 12V 1A UK pins
54V/4.7A 12v/2.5a 260w switching power supply module bare board AC-DC buck module Step-down module
The latest article
S series S1000 energy storage mobile power supply
2021-03-18S series S900 energy storage mobile power supply
2021-03-18New ABS Fire Shell Gigabit ESD Protection POE Powered Adapter Power Supply 90W POE Injector
2021-03-18ShenZhen Factory OEM ODM AC DC Open Frame Switching Power Supply Manufacturer
2021-03-18130W bare board power supply
2021-03-1880W bare board power supply
2021-03-1872W bare board power supply
2021-03-1872W bare board power supply
2021-03-1860W bare board power supply (54V)
2021-03-1836W Open Frame Power Supply
2021-03-1836W Open Frame Power Supply
2021-03-1830W Open Frame Power Supply
2021-03-1810W Open Frame Power Supply
2021-03-187W Open Frame Power Supply
2021-03-187W Open Frame Power Supply
2021-03-18Amplifier + power supply
2021-03-1060W single power supply
2021-03-10Amplifier + power supply
2021-03-1027W single power supply
2021-03-10Amplifier + power supply
2021-03-1030W power amplifier power supply
2021-03-10144W power amplifier power supply
2021-03-1048W desktop
2021-03-1048W desktop
2021-03-1024W U.S. regulations
2021-03-1018W U.S. regulations 18W Wall-Mounted Power Adapter
2021-03-1018W U.S. regulations18W Wall-Mounted Power Adapter
2021-03-1018W European standard Power Adapter
2021-03-1018W European standard Power Adapter
2021-03-1018W U.S. regulations18W Wall-Mounted Power Adapter
2021-03-10The latest article
What are the types of mobile phone chargers and their functions?
2022-05-21Advantages of switching power adapters
2022-05-21Five core functions that the power adapter can achieve.adapter manufacture
2022-05-20Analysis of the importance of power adapters for notebooks.adapter Processor
2022-05-20Details of switching power supply in maintenance
2022-05-19Understand the precautions of the power adapter and be an expert in electricity safety
2022-05-19This is how the EMC interference of the switching power supply is generated.adapter wholesaler
2022-05-18The relationship between the nominal voltage and current of the power adapter.power adapter price
2022-05-18Five basic functions of notebook power adapters.adapter wholesaler
2022-05-17Lightning surge immunity test method.power adapter price
2022-05-17Switching power supply ripple source and control
2022-05-16Level 6 energy efficiency standard power adapter T series
2022-05-16Children sleeping with pacifiers are prone to tooth decay
2022-05-16Six methods to deal with the heating problem of switching power supply transformer
2022-05-14The principle of flyback switching power supply
2022-05-14Types of thermal protection for power adapters.adjustable power adapter
2022-05-13Summary of common faults of LED switching power supply
2022-05-13The power transistor should be used like this in the power adapter
2022-05-124 modulation methods of switching power supply
2022-05-12Some little knowledge about switching power supply
2022-05-11Laptop Power Adapter Troubleshooting Steps
2022-05-119 classification methods of switching power supply
2022-05-10Advantages and disadvantages of switching power supply current mode
2022-05-10Advantages and disadvantages of switching power supply current mode
2022-05-099 classification methods of switching power supply
2022-05-09Characteristics and working methods of PFC regulated switching power supply
2022-05-07Six maintenance rules for drone lithium batteries.manual charger power adapter
2022-05-07Reasons for Inrush Current in Switching Power Supply Design.adjustable power adapter
2022-05-06The optimal solution of drone power management solution!12w acdc power adapter
2022-05-06Characteristics of Switching Power Adapter Transient Loads
2022-05-05About
Product
Process
News
Recruitment
中文
Online consultation
Online map
中
