ABCDEFGHIJKLMNOPQRSTUVWXYZ
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Design Specifications
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Switching Frequency212000Hz
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Input Voltage
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Min10.40Volt
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Max14.20Volt
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Nominal12.30Volt
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Output Voltage25.20Volt
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Output Power25.20Watt
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Output Current1.000Ampere
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Input Power37.255Watt
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Input Current3.029Ampere
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Target Efficiency0.8
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Duty Cycle
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Maximum (Min Vin)0.67
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Minimum (Max Vin)0.45
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Current Ripple Factor0.40
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Voltage Ripple Factor0.003
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Voltage Ripple0.08
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Component Selection
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Peak Switch Current3.635Ampere
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Inductor Ripple Current0.820
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Inductor36.241Microhenry
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Inductor (Selected)39.000Microhenry
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Capacitor (Calculated for Voltage Ripple)
41.794030Microfarad
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Capacitor (Selected)44.00Microfarad
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Capacitor ESR (Selected)0.18Ohm
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Capacitory ESR-Induced Ripple0.133V
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Feedback
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Reference Voltage2.5Volt
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Error Amp. Input Bias Current0.000002Ampere
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Divider Bias Current0.000200Ampere
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RB (lower resistor)12400Ohm
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R1 (upper resistor)112592Ohm
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Rf (minimum)
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Oscillator Programming
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Reference Voltage5Volt
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Discharge Current0.0083Ampere
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Peak Threshold2.80Volt
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Valley Threshold1.20Volt
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Timing Resistor2200Ohm
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Timing Capacitor0.0033Microfarad3.3
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Max Duty Cycle0.84
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Switching Frequency211425Hz
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Current Sensing
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0.275
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Sense Resistor0.250Ohm
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Control and Feedback
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Load R25
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Load Pole144Hz
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ESR Zero20095Hz
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LC1268Hz
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Crossover Frequency2242Hz
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The crossover frequency should be the lower of Fsw/10 or Frhp/5
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Current Sense Amp Gain2.850
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Current Sense RMAP0.71250
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Up-Slope224712V/s
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Down-Slope-235673V/s
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Slope Compensation-230192V/s
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-1.08581
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Plant Gain2.158
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A/B5.139
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fp0231Hz
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Placed at the origin from an integrator
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fp111210Hz
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Placed coincident with the lower of the ESR zero or the RHP zero
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fz1448Hz
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Placed at 1/5 the selected crossover frequency
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RHP Zero11210Hz
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m
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Max Input1.80172
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Min Input2.98166
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A
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Max Input9.48352Ohm
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Min Input11.09050Ohm
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B
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Max Input1.29733
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Min Input2.15805
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DC Gain
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Max Input10
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Min Input5
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Output Pole fp
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Max Input381Hz
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Min Input326
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C10.000000006124Farad6.124nF
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R257964Ohm
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C30.000000000137Farad0.137nF
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