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Gongtian F95D Mini Fan Teardown & Analysis — Circuit Analysis of a Portable Rechargeable Fan
Reviews & Teardown

Gongtian F95D Mini Fan Teardown & Analysis — Circuit Analysis of a Portable Rechargeable Fan

A teardown and circuit analysis of the Gongtian F95D portable mini fan reveals a 4-speed design with 18W fast charging, a 5000mAh 21700 battery, and USB-C power-bank output. Core components include the IP5353 charge-management SoC, an MCU, MOSFET PWM speed control, and protection circuitry. Measured speeds range from 1565 to 4695 RPM with 19.9kHz PWM.

Published on 2026-08-14
[Open Source] PD65W GaN Charger (ACF), Based on DK8607AD, IP6538-AC-65W, XPM52CDP65
Electronics / Circuits

[Open Source] PD65W GaN Charger (ACF), Based on DK8607AD, IP6538-AC-65W, XPM52CDP65

An open-source 65W PD GaN charger design is presented, combining a DK8607AD-based Active Clamp Flyback (24V/3A) supply with IP6538 or XPM52CDP65 fast-charging DCDC boards. The GaN flyback boards failed during testing, while DCDC boards delivered up to 67.7W with ~95–96% efficiency. Schematics, PCB files, transformer specs, and fabrication materials are provided.

Published on 2026-03-02
Test and Teardown of a 120W Charger Bought for 2.6 Yuan on Douyin Mall
Reviews & Teardown

Test and Teardown of a 120W Charger Bought for 2.6 Yuan on Douyin Mall

A 2.6-yuan charger claiming 120W output was tested and torn down. It supported multiple protocols but delivered only 15.6W max with high ripple and ~80% efficiency. Teardown revealed substandard components, including a small 6.8μF filter capacitor and unidentified chips. The author advises against purchasing such power supplies due to poor quality and misleading performance.

Published on 2025-02-04
Open-Source 140W+65W Buck-Boost PD3.1 Fast-Charging Module (2C+1A Ports), IP6557+IP6538,
Electronics / Circuits

Open-Source 140W+65W Buck-Boost PD3.1 Fast-Charging Module (2C+1A Ports), IP6557+IP6538,

An open-source 205W buck-boost fast-charging module based on IP6557 and IP6538 is presented, offering 140W on one Type-C port with PD3.1 support and 65W on the second Type-C and Type-A ports. Maximum conversion efficiency reaches 96.7%. Full documentation and design files are provided, enabling users to replicate a cost-effective charger.

Published on 2024-11-16

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