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ZXLD1321 Datasheet(PDF) 7 Page - Zetex Semiconductors |
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ZXLD1321 Datasheet(HTML) 7 Page - Zetex Semiconductors |
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7 / 20 page  ZXLD1321 Issue 1 - January 2008 7 www.zetex.com © Zetex Semiconductors plc 2008 High-side current monitor Reference current monitor LED thermal control circuit (TADJ) parameters Symbol Parameter Conditions Min Typ Max Units VM_VIN Supply voltage 3 18 V VMON Sense voltage =V(M_VIN) – V(M_LOAD) 0 100 200 mV IM_LOAD Input current Measured into M_LOAD pin 0.08 1 µA TCO (MON) Temperature coefficient VMON=10mV VMON=100mV 370 150 ppm/ K BW Bandwidth VMON=10mV VMON=100mV 350 2.5 KHz MHz Gm Transconductance Iout/ VMON 1mA/V Acc Accuracy RM = 0.1 Ω VMON = 100mV -3 3 % Symbol Parameter Conditions Min Typ Max Units VADJ Adjust Voltage 0 500 mV TCO (MON) Temperature Coefficient VADJ=50mV VADJ=500mV 160 200 ppm/ K BW Bandwidth VADJ=50mV VADJ=500mV 275 3 KHz MHz Gm Transconductance Iout/ VADJ 200 µA/V Acc Accuracy VADJ=500mV -3 3 % Symbol Parameter Conditions Min Typ Max Units VTADJH Upper threshold voltage Onset of output current reduction (VTADJ falling) 75 mV VTADJL Lower threshold voltage Output current reduced to <10% of set value (VTADJ falling) 50 mV Gm(TADJ) Transconductance Iout/ VTADJ 4mA/V |
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