Circuit Design

To unroute (or ripup) a complete board, first activate the ripup tool by clicking the ripup icon， or run command ripup; Then, click the ‘go’ button in the top of the Eagle window to ripup all signals:

ICE5QSAG: Infineon latest 5 th generation quasi-resonant flyback PWM controller offers high performance and comprehensive suite of protection to increase system robustness. VCC: 10.4~24V Freq: 20k~ VCC Turn-on Threshold Voltage: 16V VCC Turn-off Threshold Voltage :10V Maximum on time in normal operation: 35us Maximumoff time in normal operation :42.5us

TL331 : 1-In-, 2-V-, 3 In+, 4-Out, 5-VCC;  () LMV331 : 1-In+, 2-GND, 3-In-, 4-Out, 5 Vcc+ MIC722 : 1-Out, 2-V+, 3-IN+, 4-IN-, 5- V- TS881 : 1-Out, 2-V-, 3-IN+, 4-IN-, 5-V+

Use command:        display torig borig;   # Display the top and bottom origins     group all;             # Group everything     smash (C>0 0);         # Smash everything in the group     display none tname bname tval bval; # OPTIONAL: limit changes the names and values     group all;             # Group everything including smashed texts.     change font vector (C>0 0); # Change the font to a vector font     change size 50mil (C>0 0); # Change the font size     change ratio 15 (C>0 0); # Change the width:height ratio     display last;

Recently, I am trying to design a high side current sensor circuit in my power system. But I am suffering occasionally broken of the sensor chip. And I realize that the proper protection of this circuit is quite important. Here is a protection circuit came from Ti Design. The original file could be found here .

When I use Multisim Blue mouser version to simulation a circuit. I found that this version do not have a pulse source, so it is difficult to generate a pulse with delay. I found a method that could use pulse by make a component by component wizard. The steps as blew. 1) Select from menu. Tools->Component Wizard Fill the Component name as you like. Select Simulation only. Then click Button “next” Set the number of pins to 2. Then click Button “next” Click Button “copy from DB” Select Clock voltage. Then click Button “OK” Click Button “Next” click Button “Next” Fill Model Name “pulseS” and Fill Model data with: .SUBCKT pulseS CR1 CR2 PARAMS: V1=0 V2=15 TD=0NS TR=10NS TF=10NS PW=20US PER=100US vV1 CR1 CR2 PULSE({V1} {V2} {TD} {TR} {TF} {PW} {PER}) .ENDS Then click Button “Next” Then click Button “Finish”. You can put the component on where you want. When you want to change the parameter, you can right click the components and select “properties”, then click Ta...

A digital potentiometer (also called a resistive digital-to-analog converter or informally a digipot ) is a digitally-controlled electronic component that mimics the analog functions of a potentiometer . It is often used for trimming and scaling analog signals by microcontrollers . It Can be divided to Volatile version and Non Volatile version. Volatile Version will reset when lost power. The non-volatile version can keep the set when lost power. Manufacturer Part #: Optional Digital Interface Package Price for 100($) Voltage MCP4024T-103E/OT MCP402X （2.1k, 5k, 10k, 50k） Serial (2-Wire, CS and U/D) SOT-23-5 60 3.3 V, 5 V DS4301U-200+ 200k Up/Down USOP-8 67 2.4 V to 5.5 V MCP4141-103E/MS MCP414X/MCP416X MCP424X/MCP426X Serial (4-Wire, SPI) MSOP-8 61 2.5 V, 3.3 V, 5 V MCP4541-103E/MS MCP454X/MCP456X MCP464X/MCP466X Serial (2-Wire, I2C) MSOP-8 61 2.5 V, 3.3 V, 5 V CAT5140ZI-50-GT3 50k, 100k Serial (...