{"text_format":"1","workbook":"xlsx","n_sheets":6,"sheets":["Title","1. System Requirments","2. Bias Components ","3. Thermal","4. Schem & BOM","Troubleshooting"],"not_rendered":{"charts":2,"images":4,"macros":1,"external_links":0,"defined_names":2,"comments":0,"pivot_tables":0},"unopened":[],"bounds":{"document_bytes":16777216,"sheet_cells":100000,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096},"cells_cut":0,"cells_raw":0,"read":"whole","date_system":"1900"}

{"sheet":"Title","index":0,"n_rows":49,"n_cols":1,"rows_kept":49,"cut":false,"hidden":false,"merged":[]}
[]
[]
[]
["Electronic Fuse/Inrush Limiter"]
[]
["NIS5232 Design Aid"]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
["Directions:"]
[]
["Begin with sheet 1 and work in order of the sheet numbers. All user inputs are in cells with magenta backgrounds."]
["The remarks input on sheet 1 will be copied to the other sheets for future reference to revisions, etc…"]
[]
["Please note that all calculations on this sheet are based on nominal values. For a worst case design, consult the "]
["data sheet for the appropriate tolerances that need to be factored in. "]
[]
["Sheet 1:  System inputs for Current Limit and dv/dt circuit."]
[]
["Sheet 2:  Suggested values and user input for actual resistor and capacitor selections."]
[]
["Sheet 3:  Thermal calcuations"]
[]
["Sheet 4:  Basic schematic and parts list, based on inputs from the other sheets. "]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
["Rev. 3                                                                                                                                                           Copyright 2009, ON Semiconductor"]

{"sheet":"1. System Requirments","index":1,"n_rows":51,"n_cols":12,"rows_kept":51,"cut":false,"hidden":false,"merged":[[14,4,14,5],[12,4,12,5],[12,0,12,1],[13,4,13,5],[6,4,6,5],[7,4,7,5],[8,4,8,5],[9,4,9,5],[10,4,10,5],[11,4,11,5],[5,4,5,5],[0,0,0,5],[1,4,1,5],[2,1,2,5],[3,3,3,5],[4,4,4,5]]}
["NIS5232 Design Aid                                       ON Semiconductor"]
[]
["Remarks:","NIS5232 Design Assistance"]
[null,"Enter titles and rev information in above space"]
[]
[]
[]
["Maximum steady state input: ",null,15,"Volts",{"$f":"IF(C8>18,\"Max steady state rating is 18 volts\",IF(C8<7.6, \"Min input voltage is 7.6 volts\", \" \"))","v":" "}]
[]
["Enter \"K\" or \"D\" for Kelvin or Direct Sensing",null,"k","K/D",{"$f":"IF(C10=\"k\",\" \",IF(C10=\"d\",\" \",\"Please enter K or D\"))","v":" "}]
["Current Limit Short Circuit Level:",null,2.5,"Amps",{"$f":"IF(C11<0.4, \"Current limit out of range, increase level\",IF(C11<=10, \"  \",IF(C11>5.5,\"Current limit out of range, decrease level\")))","v":"  "}]
[]
[" Output Slew Rate (t from 0 -12 V)",null,20,"ms"]
[]
[]
[null,null,null,null,null,null,null,null,null,null,null,"  This graph shows the overload and short circuit current limit"]
[null,null,null,null,null,null,"R_limit","Overload","Short Ckt",null,null,"curves. The lower curve (short circuit) is the current limit "]
[null,null,null,null,null,null,8.9,6.45,5.46,null,null,"level that the device will limit at when there is significant "]
[null,null,null,null,null,null,12.4,5.16,4.03,null,null,"voltage from drain to source (<300 mV) of the main power"]
[null,null,null,null,null,"Kelvin Sensing",17.399999999999999,4.25,3.04,null,null,"FET. This occurs at turn on, into a capacitor, or during a "]
[null,null,null,null,null,"Schematic and Curves",26.7,3.47,2.1,null,null,"short circuit event."]
[null,null,null,null,null,null,44.2,2.97,1.36,null,null,"  The overload level is in effect when the unit is operational"]
[null,null,null,null,null,null,90.9,2.56,0.7,null,null,"and the FET is fully enhanced (at its lowest Rds(on)). When "]
[null,null,null,null,null,null,null,null,null,null,null,"the overload level is reached, the current limit will auto-"]
[null,null,null,null,null,null,null,null,null,null,null,"matically reduce to the short circuit level. "]
[null,null,null,null,null,null,null,null,null,null,null,"  For more information on this feature, refer to appliation note"]
[null,null,null,null,null,null,null,null,null,null,null,"AND8140."]
[]
[]
[]
[]
[null,null,null,null,null,null,null,null,null,null,null,"Kelvin sensing is used for the data in the electrical table and"]
[null,null,null,null,null,null,null,null,null,null,null,"therefore has guaranteed min and max limits under the conditions"]
[null,null,null,null,null,null,null,null,null,null,null,"tested. Direct sensing has only graphical data available. "]
[null,null,null,null,null,null,"R_limit","OL","SC",null,null,"There are slight differences between the overload and short "]
[null,null,null,null,null,"Direct Sensing",150,2.0499999999999998,0.44600000000000001,null,null,"circuit curves that may influence the choice of configurations. "]
[null,null,null,null,null,"Schematic and Curves",97.6,2.16,0.68]
[null,null,null,null,null,null,82,2.23,0.78]
[null,null,null,null,null,null,68,2.33,0.95]
[null,null,null,null,null,null,47.5,2.59,1.37]
[null,null,null,null,null,null,27,3.52,2.36]
[null,null,null,null,null,null,15,5.37,4.3899999999999997]
[null,null,null,null,null,null,10,8.26,7.58]
[]
[]
[]
[]
[]
[]
[]
[null,null,"Sheet 1.  System Requirements"]

{"sheet":"2. Bias Components ","index":2,"n_rows":25,"n_cols":33,"rows_kept":25,"cut":false,"hidden":false,"merged":[[4,1,4,3]]}
["NIS5232 Design Aid          ON Semiconductor"]
[]
[{"$f":"'1. System Requirments'!B3","v":"NIS5232 Design Assistance"}]
[]
[null,"Suggested",null,null,null,null,"Actual",null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"adjust","adjust","Signif ","Signif ","Signif "]
[null,"Exact","2%, 5%",0.01,null,null,null,null,null,null,null,null,null,"integ","text","length","Signif ","exp","n","n","value","value","value","value","digits","digits","digits"]
["Current Limit",null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"digits",null,0.01,0.05,0.01,0.05,0.05,0.1,0.01,0.05,0.1]
["RSense =",{"$f":"IF('1. System Requirments'!C10=\"k\",((B9)/37.23)^-1.139,IF('1. System Requirments'!C10=\"d\",(B9/74.719)^-0.97, \"K or D?\"))","v":21.676716533526641},{"$f":"Z8*10^(R8-3)","v":22},{"$f":"Y8*10^(R8-3)","v":21.5},"Ω",null,22,"Ω",null,"Ishort = ",{"$f":"IF('1. System Requirments'!C10=\"k\",37.23*(G8^-0.878),IF('1. System Requirments'!C10=\"d\",74.719*(G8^-1.0309)))","v":2.4674361456534495},"A",null,{"$f":"INT(B8+0.5)","v":22},{"$f":"N8","v":22},{"$f":"LEN(O8)","v":2},{"$f":"B8/(10^(P8-1))","v":2.1676716533526639},{"$f":"P8+2","v":4},{"$f":"INT(LOG(Q8^96))","v":32},{"$f":"INT(LOG(Q8^24))","v":8},{"$f":"10^(S8/96)","v":2.1544346900318838},{"$f":"10^(T8/24)","v":2.1544346900318838},{"$f":"IF(T8<10,V8,IF(T8<17,V8+0.1,IF(T8<21,V8,IF(T8=22,V8-0.1,IF(T8<25,V8)))))","v":2.1544346900318838},null,{"$f":"0.01*INT((U8*100)+0.5)","v":2.15},{"$f":"0.1*INT((W8*10)+0.5)","v":2.2000000000000002},null,null,null,"y = 6.4484 Ln(x) - 4.4706",null,null,"R = e^((V+4.4706)/6.4484)"]
["Ilimit = ",{"$f":"'1. System Requirments'!C11","v":2.5},"Amps",null,null,null,null,null,null,"Ioverload = ",{"$f":"IF('1. System Requirments'!C10=\"k\", ((42.65*(G8^-1.0611))+2.2), IF('1. System Requirments'!C10=\"d\",((98.879*(G8^-1.2241))+1.8)))","v":3.8049973840081384},"A",null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"y = 4.8916 Ln(x) - 0.0143"]
[]
[null,"Min","Typ","Max",null,"Note:  The min/max values for the current limit are based on"]
["Ishort",{"$f":"C12*0.8","v":1.9739489165227597},{"$f":"K8","v":2.4674361456534495},{"$f":"C12*1.235","v":3.0472836398820102},null,null,"the tolerance of the short circuit current from the data sheet. "]
["Ioverload",{"$f":"C13*0.8","v":3.0439979072065109},{"$f":"K9","v":3.8049973840081384},{"$f":"C13*1.235","v":4.699171769250051},null,null,"These are not guaranteed numbers, but are considered to be"]
[null,null,null,null,null,null,"reasonably accurate."]
[]
[]
[null,"Exact",0.05,0.1]
["Output Slew Rate (dv/dt)",null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,0.1,null,0.1]
["Cdv/dt =",{"$f":"IF('1. System Requirments'!C13<1.5,\"0\",((B20/24000000000)-0.00000000005)*1000000000000)","v":783.33333333333337},{"$f":"IF(B19=\"0\",\"0\",Z19*10^R19)","v":750},{"$f":"IF(B19=\"0\",\"0\",AA19*10^R19)","v":820.00000000000011},"pF",null,820,"pF",null,"t0-12 =",{"$f":"((50+G19)/1000000000000)*24000000000","v":20.88},"ms",null,{"$f":"INT(B19+0.5)","v":783},{"$f":"N19","v":783},{"$f":"LEN(O19)","v":3},{"$f":"B19/(10^(P19-1))","v":7.8333333333333339},{"$f":"P19-1","v":2},{"$f":"INT(LOG(Q19^12)+0.5)","v":11},{"$f":"INT(LOG(Q19^24)+0.5)","v":21},{"$f":"10^(S19/12)","v":8.2540418526801833},{"$f":"10^(T19/24)","v":7.4989420933245592},{"$f":"IF(T19<10,V19,IF(T19<17,V19+0.1,IF(T19<21,V19,IF(T19=22,V19-0.1,IF(T19<25,V19)))))","v":7.4989420933245592},{"$f":"IF(S19<5,U19,IF(S19<9,U19+0.1,IF(S19<11,U19,IF(S19<12,U19-0.1,U19))))","v":8.1540418526801837},null,{"$f":"0.1*INT((W19*10)+0.5)","v":7.5},{"$f":"0.1*INT((X19*10)+0.5)","v":8.2000000000000011},null,null,"y = 24.825 Ln(x) - 69.6",null,null,"R = e^((V+69.6)/24.825)"]
["t0-12 =",{"$f":"'1. System Requirments'!C13","v":20},"ms",null,null,null,".",null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"y = 23.147 Ln(x) - 64.098"]
[]
[]
[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"I = 59.375 R-0.8364",null,null,"R = (I/59.375)-1.1956"]
[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,"I = 28.508 R-0.4655"]
[null,null,"Sheet 4.  Bias Components"]

{"sheet":"3. Thermal","index":3,"n_rows":51,"n_cols":6,"rows_kept":51,"cut":false,"hidden":false,"merged":[[6,0,6,3],[10,0,10,3],[15,0,15,1],[16,0,16,1]]}
["NIS5232 Design Aid          ON Semiconductor"]
[]
["Thermal Calculations"]
[]
[{"$f":"'1. System Requirments'!B3","v":"NIS5232 Design Assistance"}]
[]
["metric conversion"]
[160,"mm2  = ",{"$f":"A8/645.16","v":0.24800049600099203},"in2"]
[]
[null,null,null,null,null,"This calculation is based on empirical data and does "]
["Temperature Rise",null,null,null,null,"not include the effects of airflow. The data was taken on a "]
[null,"Average current =",2.5,"A",{"$f":"IF(C12<0,\"Must use postitive number\",IF(C12>11.5,\"Out of range, reduce current\",\" \"))","v":" "},"0.063\", double sided board with 1 oz. copper."]
[null,"Copper area =",0.25,"in2",null,{"$f":"IF(C13<0.015, \"use 0.015 sq. in. for min copper\",\" \")","v":" "}]
[null,"Max ambient temp =",80,"°C",null,"This calculation also does not include the effects of"]
[null,null,null,null,null,"surrounding thermal sources.  It is strongly advised to "]
["CaseTemperature",null,{"$f":"C17-(20*0.06*C12^2)","v":110.98603059108676},"°C",null,"conduct appropriate testing to confirm safe thermal "]
["Junction Temp",null,{"$f":"((61.1*C13^-0.3741)*((C12^2)*0.06))+C14","v":118.48603059108676},"°C",null,"performance."]
[]
[null,null,null,null,{"$f":"IF(C19>125,\"Caution, thermal shutdown at 135°C\",\" \")","v":" "},{"$f":"IF(C17>125, \"Operation at this temperature in not recommended\",\" \")","v":" "}]
[null,null,null,null,null,"Calculations are valid for copper area up to 2 in2. "]
[null,null,null,null,null,"For minimum copper area enter 0.015 in2."]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[null,null,null,null,"Sheet 3.  Thermal Data"]

{"sheet":"4. Schem & BOM","index":4,"n_rows":48,"n_cols":9,"rows_kept":48,"cut":false,"hidden":false,"merged":[[40,0,40,5],[31,6,31,7]]}
["NIS5232 Design Aid          ON Semiconductor"]
[]
[{"$f":"'1. System Requirments'!B3","v":"NIS5232 Design Assistance"}]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
[]
["Kelvin schematic for NIS5232",null,null,null,null,null,null,null,"Direct schematic for NIS5232"]
[]
[]
[]
[]
["Specifications:"]
[null,null,"Ilimit =",{"$f":"'2. Bias Components '!K8","v":2.4674361456534495},"A",null,"(short circuit limit level)"]
[{"$f":"IF('1. System Requirments'!C10=\"k\",\"Kelvin sense\",IF('1. System Requirments'!C10=\"d\", \"Direct sense\", \"D or K?\"))","v":"Kelvin sense"},null,"Ilimit =",{"$f":"'2. Bias Components '!K9","v":3.8049973840081384},"A",null,"(overload limit level)"]
[null,null,"t0-12 = ",{"$f":"'2. Bias Components '!K19","v":20.88},"ms"]
[]
[]
["Parts:","Quan.",null,null,null,null,"Pdiss"]
[null,1,"Rlimit =",{"$f":"'2. Bias Components '!G8","v":22},"Ω",null,{"$f":"500/D33","v":22.727272727272727},"mW","Note: Actual resistor ratings should be"]
[null,1,"Cdv/dt = ",{"$f":"'2. Bias Components '!G19","v":820},"pF",null,null,null,"derated by a factor of at least 2; so a"]
[null,null,null,null,null,null,null,null,"resistor that will dissipate 10 mW "]
[null,null,null,null,null,null,null,null,"should have at least a 20 mW rating."]
[]
[]
[]
[]
["Thermal Conditions"]
[]
["Maximum Junction Temperature:",null,null,null,{"$f":"'3. Thermal'!C17","v":118.48603059108676},"°C"]
["Maximum Case Temperature:",null,null,null,{"$f":"'3. Thermal'!C16","v":110.98603059108676},"°C"]
[]
[]
[]
[null,null,null,null,"Sheet 4.  Schematic and BOM"]

{"sheet":"Troubleshooting","index":5,"n_rows":39,"n_cols":1,"rows_kept":39,"cut":false,"hidden":false,"merged":[]}
["NIS5232 Troubleshooting Guide"]
[]
["It is strongly recommended that an oscilloscope be used for troubleshooting this device. While DVM's are"]
["convenient and accurate, they won't often yeild valuable information such as if a signal is oscillating.  All"]
["signals on this unit should be dc levels.  If an ac signal is found, the source of the oscillation must be "]
["determined and rectified."]
[]
["Problem:"]
["Device does not turn on -     "]
["1.  Check the Vcc and ground connections to assure that the chip has proper power applied to it. The "]
["operating input range is 9 to 18 Vdc. "]
[]
["2.  Measure the enable voltage and confirm that it is greater than 3.3 volts. Below this voltage, the "]
["device may not turn on. "]
[]
["3.  The dv/dt pin needs to be either connected to a capacitor, which sets the slope of the output voltage "]
["when the device turns on, or left floating. Do not ground this pin. "]
[]
["4.  An appropriate current sense resistor needs to be connected.  If the path between the source and"]
["current limit pins is open, the device will not turn on. "]
[]
["5.  This chip employes a latching thermal circuit. Assure that there is not an overload condition "]
["on the output that could run the device into thermal limit."]
[]
["Output voltage is low -     "]
["1.  If the output voltage is low but not zero, assure that there is not an overload condition on the "]
["output. The eFuse will reduce the output voltage if the current limit point is reached and will remain there"]
["until the fault is removed or the temperature limit is reached and the part shuts down."]
[]
["2. The overvoltage clamp will activate between 14 and 16.2 volts. If the input is in this range or above, "]
["the output voltage will be limited by the internal clamp circuit. "]
[]
["Current limit is too high -   The NIS5232 uses a dual level current limit, based on the physics of the "]
["SENSEFET.  At turn on, the inrush limiter sees a short circuit, due to the charging of any capacitance"]
["on its output. Under this condition, the current will limit at the level shown on the short circuit limit curve."]
["Once the unit is operational, the SENSEFET is fully enhanced (at its lowest RDSon). Under this condition"]
["it will not limit the current until it reaches the level of the overload current limit. When this level is reached"]
["the current limit will automatically drop down to the short circuit limit level. Please see application note"]
["AND8140 for more details on this. "]