Electronic Components Datasheet Search |
|
L6713A Datasheet(PDF) 56 Page - Holtek Semiconductor Inc |
|
L6713A Datasheet(HTML) 56 Page - Holtek Semiconductor Inc |
56 / 64 page Tolerance band (TOB) definition L6713A 56/64 23.2 Ext. current sense circuit tolerance (TOBCurrSense) It can be further sliced as follow: ● Inductor DCR Tolerance (kDCR). Variations in the inductor DCR impacts on the output voltage since the device reads a current that is different from the real current flowing into the sense element. As a results, the controller will source a IDROOP current different from the nominal. The results will be an AVP different from the nominal in the same percentage as the DCR is different from the nominal. Since all the sense elements results to be in parallel, the error related to the inductor DCR has to be divided by the number of phases (N). ● Trans-conductance resistors tolerance (kRg). Variations in the Rg resistors impacts in the current reading circuit gain and so impacts on the output voltage. The results will be an AVP different from the nominal in the same percentage as the Rg is different from the nominal. Since all the sense elements results to be in parallel, and so the three current reading circuits, the error related to the Rg resistors has to be divided by the number of phases (N). ● NTC Initial Accuracy (kNTC_0). Variations in the NTC nominal value at room temperature used for the thermal compensation impacts on the AVP in the same percentage as before. In addition, the benefit of the division by the number of phases N cannot be applied in this case. ● NTC Temperature Accuracy (kNTC). NTC variations from room to hot also impacts on the output voltage positioning. The impact is bigger as big is the temperature variation from room to hot ( ∆T). All these parameters impacts the AVP, so they must be weighted on the maximum voltage swing from zero load up to the maximum electrical current (VAVP). Total error from external current sense circuit results: 23.3 Time constant matching error tolerance (TOBTCMatching) ● Inductance and capacitance Tolerance (kL, kC). Variations in the inductance value and in the value of the capacitor used for the Time Constant Matching causes over/under shoots after a load transient appliance. This impacts the output voltage and then the TOB. Since all the sense elements results to be in parallel, the error related to the time constant mismatch has to be divided by the number of phases (N). ● Capacitance Temperature Variations (kCt). The capacitor used for time constant matching also vary with temperature ( ∆TC) impacting on the output voltage transients ad before. Since all the sense elements results to be in parallel, the error related to the time constant mismatch has to be divided by the number of phases (N). All these parameters impact the Dynamic AVP, so they must be weighted on the maximum dynamic voltage swing (Idyn). Total error due to time constant mismatch results: TOB CurrSense V AVP 2 k DCR 2 N -------------- k Rg 2 N --------- k NTC0 2 α∆Tk NTC ⋅⋅ DCR --------------------------------------- ⎝⎠ ⎛⎞ 2 ++ + ⋅ = TOB TCMatching V AVPDyn 2 k L 2 k C 2 k Ct ∆TC ⋅ () 2 ++ N ------------------------------------------------------------ ⋅ = |
Similar Part No. - L6713A |
|
Similar Description - L6713A |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |