Switching Regulator (Boost) Component Calculator mechanism

Model scope

The specification is not complete enough to verify the claimed Cout and peak-current outputs uniquely. The test vectors use explicit conventional ideal-CCM assumptions. Vector 3 has a corrected capacitor calculation: 0.75×(7/12)/(1000000×0.12)=0.0000036458333333 F.

• The capacitor-sizing formula for Cout is missing; a common ideal-CCM formula is Cout=Iout*D/(f*ΔVout), assuming specified absolute output-voltage ripple and negligible ESR.
• The switch/diode peak-current formula is not stated. Under ideal CCM boost assumptions, average inductor current is IL_avg=Iout/(1-D), and switch and diode peak current are typically IL_avg+ΔIL/2, but conduction intervals and nonideal losses are not specified.
• D=1−Vin/Vout is the ideal steady-state boost duty-cycle formula only for Vout>Vin and ideal continuous-conduction operation; real designs require voltage-drop and efficiency allowances.
• The input list says ripple targets but does not identify output-voltage ripple ΔVout, which is required to calculate Cout.

Units and conventions

• Vin and Vout are in volts, Iout and ΔIL are in amperes, frequency is in hertz, ΔVout is an absolute voltage ripple in volts.
• L is returned in henries and Cout is returned in farads; convert to microhenries or microfarads only for display.
• All test vectors use ideal CCM boost equations, negligible switch and diode voltage drops, negligible capacitor ESR, and steady-state operation.
• ΔIL is the peak-to-peak inductor-current ripple.
• For the stated peak-current outputs, IL_avg=Iout/(1-D), and both switch and diode peak current are taken as IL_avg+ΔIL/2.

Inspectable vector

One of 4 source-bound review vectors:

{
  "inputs": {
    "Vin_V": 12,
    "Vout_V": 24,
    "Iout_A": 2,
    "freq_Hz": 500000,
    "delta_IL_A": 1.2,
    "delta_Vout_V": 0.24
  },
  "expected_outputs": {
    "D": 0.5,
    "L_H": 0.00001,
    "Cout_F": 0.0000041666666667,
    "IL_avg_A": 4,
    "switch_peak_A": 4.6,
    "diode_peak_A": 4.6
  },
  "working": "D=1−12/24=1−0.5=0.5. L=12×0.5/(500000×1.2)=6/600000=0.00001 H. Cout=2×0.5/(500000×0.24)=1/120000=0.0000083333333333? Correction: denominator 500000×0.24=120000; numerator 1; therefore Cout=0.0000083333333333 F. IL_avg=2/(1−0.5)=2/0.5=4 A. Peak=4+1.2/2=4+0.6=4.6 A for both switch and diode."
}

Failure boundary

BREAK_CLAIMED · SELF_FLAGGED

The boundary and zero-denominator inputs require rejection, and the CCM/DCM branch is not defined even though the stated equations are explicitly idealized CCM equations. The capacitor-sizing formula and ripple convention are also omitted or ambiguous in the specification.

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json
• BOUNDARY_HAZARD_CATALOG.json