Application example

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Formulas used to calculate electrical characteristics

Connecting windings in series:

• Inductance = Inductance(table) × (number of windings)2
• DCR = DCR(table) × number of windings
• Isat = (Isat(table) × 6) ÷ number of windings connected in series
• Irms = Irms(table)

Connecting windings in parallel:

• Inductance = Inductance(table)
• DCR = 1 ÷ [number of windings × (1 ÷ DCR(table))]
• Isat = (Isat(table) × 6) ÷ number of windings connected in series
• Irms = Irms(table) × number of windings

Create a 1:1 gate drive transformer

Connecting primary windings in parallel:
When primary windings (Wpri) are connected in series, inductance and volt-time product increase, energy storage and Irms remain the same, but DCR increases.

Example: For HPH1-1400L, connect three primary windings in series:

• Inductance = Inductance(table) × Wpri2 = 89.6 × 9 = 806.4 μH
• DCR = DCR(table) × Wpri = 0.130 × 3 = 0.39 Ohms
• VT = VT(table) × Wpri = 70.2 V-μsec
• Irms = Irms(table) = 0.74 A

• DCR = DCR(table) × Wsec = 0.130 × 3 = 0.39 Ohms
• Irms = Irms(table) = 0.74 A