Infineon CoolGaN G5 IGL65R080D2 Drives the PFC Stage of a 150W Multi-Port USB-C Adapter
2026-11-03 · Compiled by Best IT Parts from public industry reporting
Lenovo's 150W multi-port USB-C GaN adapter, model MCFX150A3, uses an Infineon IGL65R080D2 GaN transistor in its PFC boost stage, per a teardown of the unit. The brick carries three USB-C ports: C1 and C2 each deliver up to 140W, C3 up to 65W, and all three share a 150W budget through intelligent power allocation, enough for a notebook, tablet and phone at once.
The topology is a two-stage PFC plus HFB design. The boost stage pairs the IGL65R080D2 with an Infineon XDPS2BF11 PFC and HFB combination controller, a boost inductor and a rectifier diode to correct power factor, shape the input current waveform and establish the high-voltage DC bus that feeds the isolated HFB stage.
The IGL65R080D2 is a 650V enhancement-mode GaN device from the CoolGaN G5 family. Typical on-resistance is 80 milliohms with a 100 milliohm maximum, typical gate charge is only 3.3nC, and it ships in a PG-TSON-8 package with bottom-side thermal conduction. Low output charge and zero reverse-recovery charge support high-frequency switching, while the small gate charge keeps drive losses down. Heat moves from the package into the PCB and then into the adapter's double-sided metal heatsinks, with thermal adhesive applied across the PCBA for additional spreading.
For repair and sourcing teams the design is a useful reference point: a 650V, 80 milliohm GaN switch in TSON-8 driven by a combo PFC and HFB controller is becoming a repeatable pattern in 140W to 150W USB-C power supplies, where port count and power density carry more weight than component count. Parts of this class also matter to refurbishers, since a failed PFC switch is a common write-off point in high-wattage bricks.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.