1、POWER SUPPLY PROJECTAGILENT 6612C (KEYSIGHT 6612C) POWER SUPPLY REPLACEMENT.內 容Feature .3Key parts .4OPA547T TO220.4Arduino Mega-2560 .5Arduino Mega2560 extension board (shield) (mega2560 扩展板) .7INA219 power monitor.8LCD display i2C 10to220 散热片 .10Dc POWER SUPPLY 11BOM 12Schematic.13OPAMP opa547.14I
2、_LIM Formula .14Vout Formula:.15Arduino Board connection16current limit calibration17wIRE sOLDERING .錯誤! 尚未定義書籤。Calibration23Test equipment requirement: 23Calibration procedure 23FEATURESCPI command supportInterface: Com port (protocol: 9600,N, 8,1 )Voltage output: 09VCurrent Output: 0200mA ( max 50
3、0mA but need heat sinking solution)Measurement capability:Hight +26V 1ALow 16V, 400mAMeasure speed: +2.4 V (working mode)V_+E/S LOW (output disabled) E/S Pin Forced LOW (V) +0.8 V (Thermal Shutdown Status) E/S pin Force low to disable outputCURRENT LIMIT CALIBRATIONI_lim=(Vbase-Vadc)*rateX=VbaseY= r
4、ateI_lim= (X- Vadc ) *YSet device:Volt 2VOUT 1Debug:1PWM:3: 714 ( expect around 200mA current limit.) record current by current meter. (I_200mA)PWM:3 843 ( expect around 100mA current limit.) record current by current meter. (I_100mA)Put equation in website I_200mA=(x-714)*y , I_100mA=(x-843)*yTo ge
5、t X and Y value.Case 1: I_200mA= 142mAI_100mA=77.8mA142=(x714)y77.8=(x843)yX=999.33, Y=0.4977a= I200mA Actual measurement current under 200mA settingb= I100mA Actual measurement current under 100mA setting=( 843714)= ( 843714)Put both value in FW code ADC_Base =X , Rate=YWIRE SOLDERINGPICTURESUSB EX
6、TENSION CABLECALIBRATION Calibration procedure implemented in GTS scrip file.TEST EQUIPMENT REQUIREMENT: 1: voltage meter2: current meter (range 0 200mA)3 DUT (with external power plug 12V/ 2A)CALIBRATION PROCEDURE 儀 器 準 備 :電流表 0200mA 電流表 ( 需要越精準越好)步 驟 RUN scrip file. Maetay6612_calibration.xmz (需安裝 GTS ) 先不掛上 電流表 程式會自動挑整電壓到 5V 按照指示 (Apply Current Meter) 掛上 電流表( 一端接地 一端接輸出 ) 使其輸出大電流進入電流保護 狀態 輸入電流表讀到的電流值 (mA) 70100 左右 輸入完 按 enter 再次 輸入電流表讀到的電流值 (mA) 140150 左右 輸入完 按 enter 再次 輸入電流表讀到的電流值 (mA) 150 左右 輸入完 按 enter 拿開 電流表 (Remove Current Meter) 完成校驗
