TL431 Shunt Regulator Voltage
Estimate the feedback divider for a TL431-based voltage target.
Input parameters
Results
Check cathode current, reference current, and stability.
Model & assumptions
Vout = Vref(1 + Rupper/Rlower) + Iref Rupper; Rupper = (Vtarget − Vref)/(Vref/Rlower + Iref).
Divider estimate only. Enter worst-case reference current where needed; cathode bias current and stability are separate checks.
Sources
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