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NEWS65W Mini Charger Uses mmWave Isolation at 1 MHz Switching
A chip developer showed a 65W reference charger using mmWave isolation and co-packaged power chips, with PCBA volume about a quarter of conventional designs.
Sep 22, 2026 · Dangel Technology editorial
At the 2026 fall Asia Charging Expo in Shenzhen on September 11, a developer of ultra-short-range mmWave interconnect chips demonstrated a 65W fast charger built on its DKP36xx chip and module family. The company describes it as the smallest 65W charger shown to date, following a path of higher switching frequency, third-generation semiconductors and co-packaged integration.
Two compact board layouts were shown. A flat biscuit form factor measures 62.5 by 37.5 by 12 mm, while a square-bottle layout measures 36 by 27.5 by 26 mm. The design supports 100 kHz, 300 kHz, 500 kHz and 1 MHz modes; the higher modes shrink magnetics and capacitors, reducing system volume to roughly one quarter to one third of a conventional design.
The control architecture inverts the usual arrangement: the secondary side controls the primary side, which the developer says brings low loop latency and fast dynamic response, limiting output-voltage deviation and shortening recovery when the load steps. Primary control, secondary control, isolation and GaN drive are offered as discrete chips or as co-packaged parts.
The co-packaged route is illustrated by the DK3680, a single device integrating all four functions and positioned as a replacement for four discrete components, simplifying the surrounding circuit. High-frequency, high-voltage isolation uses the developer's MillConnex mmWave wireless isolation technology, targeting low-latency communication in fast-switching supplies.
For charger makers the relevance lies in the constraint it attacks. As fast charging shifts from raw power increases toward system efficiency and space utilisation, gate drive, isolation and control blocks increasingly set the ceiling on how far GaN and SiC can be pushed. The vendor says it will extend the work into data-centre, industrial and automotive power.
Key points
- Two 65W PCBA options: 62.5 x 37.5 x 12 mm and 36 x 27.5 x 26 mm
- Operating modes of 100 kHz, 300 kHz, 500 kHz and 1 MHz; volume about 1/4 to 1/3 of standard
- Secondary-controls-primary loop targets low latency and fast load-step response
- DK3680 co-packaged part replaces four discrete control, isolation and drive devices
Industry news compiled by Dangel Technology editorial from public reporting by Chongdiantou (charging industry media). Technical figures are reproduced as reported; verify specifications against the original source before design or procurement decisions.
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