Teardown: UGREEN X606 100 W Retractable-Cable GaN Charger — SC3252 PFC, SC3057B QR Flyback, Three Buck Controllers
2026-10-20 · Compiled by Best IT Parts from public industry reporting
UGREEN's X606 (part number 65591) is a 100 W GaN charger that integrates a retractable USB-C cable with eight detented length settings, extending to about 72.5 cm, alongside two USB-C ports and one USB-A port. Input is 100–240 V at 50/60 Hz, 1.8 A. The captive cable and USB-C1 each deliver 5–20 V at up to 5 A (100 W), USB-C2 is capped at 30 W (20 V/1.5 A) and USB-A at 22.5 W (10 V/2.25 A), with 100 W total across all four outputs. The housing measures 57.02 x 50.53 x 69.08 mm, weighs 303.8 g and carries 3C certification with foldable pins.
A POWER-Z KM003C logged UFCS, QC3+, PD3.0/PPS, DCP, Samsung 5 V/2 A and Apple 2.4 A on the cable, with fixed PDOs at 5, 9, 12 and 15 V/3 A plus 20 V/5 A and one 5–21 V/5 A PPS range.
The supply runs a PFC plus quasi-resonant flyback plus synchronous-rectification chain across three stacked PCBs, potted in thermal compound. A Southchip SC3252 PFC controller with an integrated 650 V GaN switch (ESOP-10W) drives the boost stage, followed by a NiuHang SF8JQ 600 V/8 A diode; bulk filtering uses Koshin 420 V capacitors of 47 µF and 27 µF. The primary controller is a Southchip SC3057B QR flyback with a 700 V GaN device in QFN 6x8, drawing 350 µA in operation. Secondary rectification pairs a Southchip SC3503 controller with two Wayon WMB080N10LG4 100 V, 7.8 mΩ MOSFETs in PDFN5060.
On the buck board, three iSmartWare controllers split the ports: SW3537U for the USB-A/USB-C pair, SW3561H for the dual USB-C path (Cortex-M0 core, PD3.1 SPR, 180 kHz default switching) and SW3536, each with SWT40N45 buck FETs and B3006 VBUS switches. Output filtering uses 25 V solid capacitors up to 150 µF from HEC, while input protection adds a 3.15 A/250 V fuse, a 65 °C thermal protector and two Huixin RHBS810 1000 V/8 A bridges.
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Technical details are reproduced as reported. Verify specifications against the original source before design or procurement decisions.