Chapter 1 Large emergency lighting power supply EPS and DC uninterruptible power supply cabinet replace traditional AC UPS or diesel generator.
Section 1 Unpredictability and Serious Harm of Sudden Power Failure
Section 2 China will face a severe situation of long-term power shortage and energy shortage.
In the third quarter, using diesel generators as emergency power supply will bring five major public hazards.
Section 4 Introduction of EPS Emergency Power Supply
Section 5 Several Main Defects of Traditional AC Uninterruptible Power Supply
Section VI LIPS Reconstruction Scheme and Working Principle
Chapter II DC output DC220V high-frequency switching power supply combination 30,000 W emergency lighting power cabinet
Design scheme of multiple batteries
Section 1 Simplified EPS power cabinet design block diagram and description
In the second quarter, the process of charging, normal operation, power failure and re-energizing of lead-acid batteries
Section 3 Basic Charge and Discharge Characteristics of Storage Batteries
Section 4 External Characteristics of Sealed Maintenance-Free Battery
Chapter III Korea Union High-quality Large Batteries: Valve-regulated Sealed Lead-acid Batteries
Battery MX00000 series and colloidal battery. IMX00000 series
Section 1 Introduction
Section 2 Detailed explanation of MX00000 series valve-controlled sealed lead-acid batteries
Section 3 Three Series Specifications of Batteries
Section 4 Characteristic Curve of Valve-regulated Sealed Lead-acid Battery
Section 5 Matters needing attention in charging method
Section 6 Introduction of JMX00000 Series Products of Youlian Colloidal Battery
The fourth chapter analyzes 10000W high-grade switching power supply (DC output DC 48V, 200A).
Section 1 10000W power supply performance overview
Physical analysis of three-phase input multilevel * * * mode filter circuit for 10000W high-grade power supply.
Section 3 10000W lucent UJCENT Power PFC control board chip
The fourth quarter 10000W full-bridge converter main circuit entity investigation
Section V 10000W Power Supply PFC Control Board Main Chip Function Overview
Section VI Design features, internal functions, electrical parameters and pin arrangement of full-bridge converter controller UC3875
Chapter 5 Analysis of 7000W High-grade Switching Power Supply (DC output 350V, 19A)
Section 1 General situation of performance and structure of power supply device
Section 2 Multiple Chip Models and Pins of 7000W Power Digital Signal Monitoring Board
Section 3 8 ICs of PFC power factor correction board for 7000w power supply
The fourth section 7000W power supply full-bridge converter control board layout and chip specifications
Section 5 Measured Driving Pulse Waveform of Full-bridge Converter
Section VI Functional Block Diagram, Design Features and Electrical Parameters of UCC3895
Section 7 Typical Application Circuit of Phase-shifting Control Chip of UCC3895 Full-bridge Converter
Section 8 New ZCZVS PWM Boost Full-bridge Converter
The sixth chapter accurately measures and prints the input current waveform of the power grid, and truly reflects the power factor.
Three-in-one simple result correction method
The first section introduces digital watt-hour meter PF98 1 1 intelligent electric quantity measuring instrument.
The second section measures the current waveform, spectrum characteristics and harmonics of the printed 350V/ 10A power supply under four loads.
The third section measures the input current waveform, spectrum characteristics and harmonics when printing four different loads of 48V/70A power supply.
Chapter 7: Continuous on PFC controller UCC280 19 with high power output.
Section 1 Functional Design, Pin Arrangement and Internal Circuit Diagram
In the second quarter, the working principle of each unit circuit of UCCC280 19
Section 3 Supplementary Design of Unit Circuits
In the fourth quarter, matters needing attention in designing PCB, application circuit and IC electrical characteristic parameter table.
Section 5 Design and Calculation Process Steps
Section 6 One of Loop Compensation: Current Loop Transfer Function
Section 7 Calculation of Transfer Function of Voltage Circuit
Section 8 Brown Output Protection
Chapter 8 The latest high-power power supply two-phase interactive PFC controller UCC28070 significantly reduces EMI and ripple current.
Section 1 Innovative design features, simplified external circuit, internal circuit block diagram and functions of each branch.
Working principle of UCC28070 in the second quarter
Section 3 Multi-stage Work of UCC28070
Section 4 IC adjustable peak current limit
Section 5 Enhanced Transient Response of Integrated Circuits
Section 6 Advanced Integrated Circuit Design Technology
The seventh part adopts 1000W sampling circuit designed by UCC28070.
Section 8 UCC28070 Practical Design Program
Chapter 9 symmetrical ZVS full-bridge converter and synchronous rectifier controller ISL752
Part 1: main features, internal circuit diagram and description of each pin.
Section 2 Circuit Design of Each Unit
In the third section, the high-voltage input main control full-bridge circuit composed of ISL6752
The fourth quarter ZVS full bridge working mode principle analysis
Section 5 Synchronous Rectification Control
Chapter 10 Synchronous rectifier controller NCP4302 greatly improves the efficiency of flyback switching power supply.
Section 1 IC Design Features, Pin Functions, Internal Circuits and Applications
The working principle of each unit circuit of IC in the second quarter
Chapter 11 The controller NCPl396 of LLC resonant half-bridge converter can directly drive MOSFEI under high voltage.
Section 1 IC design features, pin arrangement and internal circuit block diagram
Section II Detailed Description of New Technologies of Integrated Circuits
Section 3 Voltage Controlled Oscillator and Adjustment of Maximum and Minimum Switching Frequency
The fourth quarter brown output protection
Section 5 Fast and Slow Fault Protection Circuits
Section 6 State and Performance at Start-up
Section 7 High Voltage Drive
Chapter 12 dual-channel interactive active clamping PWM controller LM5034 is used for forward switching power supply
The first section is the concept of dual-channel interactive control and the content of each pin of IC.
Working principle of LM5034 in the second quarter
Section 3 PWM controller
The fourth quarter output drive signal
Section 5 Soft Start and Interactive Control
Section 6 summarizes two different output voltage circuit structures.
Section 7 Introduction of Other Unit Circuits
Section 8 PCB layout and practical application circuit
Chapter 13: Analysis of phase-shifting control soft switching power supply 12 process (positive and negative half cycle asymmetry) of full-bridge converter.
The first part introduces the background of the paper.
In the second section, the working principle waveform diagram of soft-switching phase-shifting control full-bridge converter is introduced in detail.
Extended phase diagram of primary and secondary current and voltage waveforms
In the third section, six working processes in the positive half of a complete switching cycle are analyzed in detail.
In the fourth section, the six working processes of negative half cycle in a complete switching cycle are analyzed in detail.
Section 5 Trial-manufacture Experience of Soft-switching Stabilized Power Supply for Phase-shifting Full-bridge Converter
Chapter 14 Physical anatomy and comprehensive measurement of two kinds of 3500W high-grade switching power supplies: DC output of 48V/70A and 350V/ 10A.
The first section dissects two kinds of 3500w high-grade switching power supplies: printed board copper foil and solder joint layout.
The second section uses PF98 1 1 intelligent electricity meter and Lenovo computer to print out the data of several 3500W power supplies.
In the third section, the data of two kinds of 3500W power supply stand-alone machines under various loads are measured and recorded.
In the fourth quarter, the peculiar high-density and high-power factor control board, 8 IC and hundreds of SMD components make PF≥0.9995.
Section 5 Dismantling SMD components of two full-bridge converters with different 3500W power supplies and preliminary drawing of equivalent circuits.
Chapter 15 Physical anatomy of two kinds of 6000W high-grade switching power supplies (DC output 48V/12A and 350V/ 17A)
The first section summarizes the improvement of two kinds of 6000W power supply, disassembling the main board diagram of 350V/ 17A power supply and the new diagram of full-bridge control board.
The second section is basically the same: the circuit design of PFC control board, in which the double interlayer of patch element has been improved in 6000W power supply, and the copper foil wiring design has changed greatly.
In the third section, there are two kinds of 6000W power supplies, six M()SFET fastening screw holes, and the schematic diagram of the switch circuit of the special power switch tube for printed circuit board.
In the fourth quarter, CP[J digital signal processing monitoring board was added to the motherboard of 350V/ 17A power supply.
Section 5 Block diagram of control circuit of switching power supply full-bridge converter, 15V regulated power supply and PFC control board.
Section 6: Self-made PFC control board with multiple discrete components: complete the single-sided wiring test and realize the technical value of low cost, high performance and localization (the key to alignment is mastery).
Circuit parameters different from the resistance-capacitance value of the patch)
Section 7 Active Clamping Circuit for Secondary Rectification of 350V Power Supply
Section 8 Four-screw connection M()SFET:F a57 sa 50 LC SOT-227 package is used for 6000W power supply.
Section 9 three-phase power grid input rectifier bridge module: VVY40 (two-end control)
Chapter 16 A new generation of active clamped PWM controller UCC289 1 is used for forward switching power supply.
Section 1 Design features, simplified circuits and internal functional blocks
Section 2 Content Arrangement of IC Pin
The working principle of active clamp in the third quarter
Section 4 Brief Introduction of Unit Circuits
Chapter 17 Excellent quasi-resonant flyback converter controller NCPl337
Chapter 18 Intelligent synchronous rectifier control IC-IR 1 166/7A-B is applicable to various converters.
Chapter 19 PWM controller with soft cycle jump and frequency jitter -NCP 127 1
Chapter 20 quasi-resonant single-ended converter NCP 1207 and NCP 1200 series chips
Outstanding advantages of No.21Zhangtie Si-Al magnetic powder core (Fe-Si-Al) in power factor correction circuit.
Chapter 22 Introduction to Magnetism Magnetic materials Molybdenum Permalloy, Qualcomm magnetic powder core, Fe-Si-Al alloy, etc. From a Hong Kong company.
Chapter 23 Application characteristics of high power density planar magnetic integration technology in switching power supply
Chapter 24 Single-stage power factor correction controller NCP 165 1
Chapter 25 LTC3722 synchronous dual-mode phase-shifting full-bridge controller: providing adaptive ZVS delay conduction, significantly reducing duty cycle loss.
Chapter 26 TNY-ⅲ new generation integrated switching power supply chip is used for medium and small power flyback switching power supply.
In chapter 27, the winding technology of 20W and 40W flyback switching power supply and main transformer is experimentally made, and several groups of high voltage pulse waveforms are measured.
In chapter 28, the test data, measured waveforms and winding methods of two kinds of 1000W full-bridge soft-switching power supplies are given.
Chapter 29 experimental production of 2000W full-bridge soft-start power supply: pay attention to monitoring primary current waveform and select output inductance parameters.
Chapter 30 LTC3900 synchronous rectifier controller is used for forward switching power supply to output low voltage and high current.
In chapter 3 1, the design and manufacturing experiments of high reliability 200-300W switching power supply with double-transistor forward converter are carried out.
In chapter 32, the design and manufacture experiment of 500W switching power supply with half-bridge converter is carried out.
Chapter 33: Characteristics of CM6805 and CM6903/4 composite PFC/PWM; Pre-modulation PFC control circuit using "ICST" input current shaping technology
Chapter 34 Making 300-800W high power factor switch with CM6800/0102.