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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT7L2102 датащи(PDF) 7 Page - Holtek Semiconductor Inc |
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HT7L2102 датащи(HTML) 7 Page - Holtek Semiconductor Inc |
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7 / 11 page  Rev. 1.00 7 November 4, 2011 HT7L2102 VCC Pin Over-Voltage Protection (OVP) VCCOver-VoltageProtectionisintegratedinthe devicetopreventcomponentdamageduetoover voltageconditionsontheVCCpin.TheOVPis triggeredwhenVCCreaches28Vandlastsfor100uS. ThePWMpulsesaredisabledwhenOVPisenabled. TS Pin Over-Temperature Protection (OTP) AnOver-TemperatureProtection(OTP)functionis integratedinthedevice.Thisfunctionwithexternal thermistorsensingwilldisablethePWMcontrollerat 1Vandsupportshighatemperaturealertandprevents damageoccurringintheapplicationcircuit. Oscillator Frequency Tuning Bychoosinganappropriatevalueofanexternal resistorbetweentheRTPinandGND,asuitable operatingfrequencycanbegenerated.Therelationship betweenthevalueofRTandtheoperatingfrequency isprovidedinFigure13. Figure 13. RT Resistor value vs. Operating Frequency |
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