MOSFET Switching Power Loss Estimator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-with-binding-errata

Evidence ID

t5-177

Effect

Computation or source lookup only

Input and validation requirements

The literal formula accepts negative Iout and produces a negative switching loss instead of rejecting the input or applying a reverse-current model. Extreme magnitudes can also produce Infinity in ordinary JavaScript evaluation, and unlabeled resistance/time units can change the result by orders of magnitude.

Required corrections

[
  {
    "vector": 1,
    "field": "conduction_loss_W / total_loss_W",
    "wrong": "0.0768 / 2.7648",
    "correct": "0.768 / 3.456",
    "cause": "64×0.012 written as 0.0768 (10× low); switching loss correct"
  }
]

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "RDS_on_ohm": 0.012,
    "Irms_A": 8,
    "Vin_V": 48,
    "Iout_A": 8,
    "tr_s": 3e-8,
    "tf_s": 4e-8,
    "fsw_Hz": 200000
  },
  "expected_outputs": {
    "conduction_loss_W": 0.0768,
    "switching_loss_W": 2.688,
    "total_loss_W": 2.7648
  },
  "working": "Pcond = Irms²×RDS(on) = 8²×0.012 = 64×0.012 = 0.0768 W.\\ntr+tf = 0.00000003+0.00000004 = 0.00000007 s.\\nPsw = 0.5×48×8×0.00000007×200000 = 192×0.014 = 2.688 W.\\nPtotal = 0.0768+2.688 = 2.7648 W."
}

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
• tranche errata record