PI3740-00 Datasheet, PDF (29/48 Pages) Vicor Corporation – Parallel capable with single wire current sharing

PI3740-00
The following equation can predict the junction temperature based on the heat load applied to the inductor and the known ambient
conditions with the simplified thermal circuit model:
T_{HOT SPOT} =
PD +
T_TOP
Φ_INT-TOP
+
T_PCB
Φ_INT-PCB
1
1
(8)
Φ ⁺ Φ _INT-TOP
INT-PCB
Device
φ_INT-TOP
(°C / W)
Thermal Impedance
φ_INT-BOT
(°C / W)
φ_INT-TAB
(°C / W)
φ_INT-LEAD1
(°C / W)
Inductor
24.3
9.67
44.5
34.0
Table 5 — PI3740-00 Inductor Thermal Impedance
φ_INT-LEAD2
(°C / W)
34.0
Thermal Impedance with
the simplified version
φ_INT-TOP
(°C / W)
φ_INT-PCB
(°C / W)
24.3
12.24
An estimation of SiP power loss to total loss percentage is shown in the following charts.
Cool-Power^® ZVS Switching Regulators
Page 29 of 48
Rev 1.4
04/2017
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