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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F4M датащи(PDF) 97 Page - Holtek Semiconductor Inc |
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HT45F4M датащи(HTML) 97 Page - Holtek Semiconductor Inc |
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97 / 138 page  Rev. 1.10 96 �an�a�� 1�� �01� Rev. 1.10 97 �an�a�� 1�� �01� HT45F4M Lithium Battery Backup Power ASSP MCU HT45F4M Lithium Battery Backup Power ASSP MCU Complementary PWM Output ThedeviceprovidesacomplementaryoutputpairofsignalswhichcanbeusedasaPWMdriver signal.ThesignalissourcedfromtheTM1outputsignal,TP1.ForPMOStypeuppersidedriving, thePWMoutputisanactivelowsignalwhileforNMOStypelowersidedrivingthePWMoutput isanactivehighsignal.WhenthesecomplementaryPWMoutputsarebothusedtodrivethe upperandlowsides,thedeadtimegeneratorwillautomaticallybeenabledandadeadtime,which isprogrammableusingtheDTPSCandDTbitsintheCPRregister,willbeinsertedtoprevent excessiveDCcurrents.Thedeadtimewillbeinsertedwhenevertherisingedgeofthedeadtime generatorinputsignaloccurs.Withadeadtimeinsertion,theoutputsignalsareeventuallysent outtotheexternalpowertransistors.Thedeadtimegeneratorwillonlybeenabledifbothofthe complementaryoutputsareused,asdeterminedbytheOUTCPbitsintheTMPCregister. TP1 DeadTime Generator DTPSC[1:0] Prescaler fH A B DT[2:0] E C D PWMH (drivinguppersidePMOS,activelow) PWML (drivinglowersideNMOS,activehigh) fD OUTCP[1:0] Complementary PWM Output Block Diagram TP1 A B C D E DeadTime DeadTime DeadTime DeadTime DeadTime DeadTime Complementary PWM Output Waveform |
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