Zeruns's Blog - English Site
[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.

发布于 2026-03-02
[Open Source] SC8703-Based Adjustable Buck-Boost DC/DC Power Supply | Voltage & Current Adjustable, PD Fast Charge Input Supported
Electronics / Circuits

[Open Source] SC8703-Based Adjustable Buck-Boost DC/DC Power Supply | Voltage & Current Adjustable, PD Fast Charge Input Supported

An open-source buck-boost DC/DC module based on SC8703 accepts 2.7–36V input and outputs 1.21–36V with up to 10A, adjustable current limit, 600kHz switching, and 95.45% peak efficiency. It includes XT30 and Type-C PD input via CH224Q. Provided files: KiCad project, Gerbers, BOM, stencils, interactive BOM, and 3D models. Proper heatsinking is required; bare-board operation is recommended below 5A.

发布于 2026-02-23
EG1164 High-Power Synchronous Rectification Boost Module Open Source with 97% Peak Efficiency
Electronics / Circuits

EG1164 High-Power Synchronous Rectification Boost Module Open Source with 97% Peak Efficiency

The article presents an open-source EG1164-based synchronous rectification boost converter module supporting 8–50V input, 8–60V adjustable output, and 219kHz switching. Test results show up to 97.3% efficiency and 287W output at 8A, with potential beyond 300W. It includes schematic, PCB layout, ripple measurements, and component purchasing guidance.

发布于 2025-02-16
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.

发布于 2025-02-04
LADS D1500 UPS Teardown Analysis
Reviews & Teardown

LADS D1500 UPS Teardown Analysis

This teardown of a LADS D1500 UPS reveals a line-frequency inverter design with an H-bridge MOSFET circuit, transformer, and two 12V/9Ah batteries. Testing showed rapid battery degradation beyond warranty, ~77% conversion efficiency at 104W input, and ~18W no-load power draw. Readers gain insight into internal components, circuit topology, and real-world performance.

发布于 2025-02-04
EG1151 High-Power Synchronous Buck-Boost Power Module (Supports Type-C PD Fast Charging) Open Source
Electronics / Circuits

EG1151 High-Power Synchronous Buck-Boost Power Module (Supports Type-C PD Fast Charging) Open Source

An open-source high-power adjustable buck-boost DC-DC module based on the EG1151 chip is introduced, using fully domestic components. It supports Type-C PD3.1 up to 48V, XT60, and DC5.5 inputs, up to 63V and 20A, with overcurrent and over-temperature protection. Measured peak efficiency is 96.8%, though sustained current is about 18A. Schematics, PCB files, and 3D-printed enclosure models are provided.

发布于 2025-01-16
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.

发布于 2024-11-16
Synchronous Rectification Buck-Boost Digital Power Supply Based on STM32
Electronics / Circuits

Synchronous Rectification Buck-Boost Digital Power Supply Based on STM32

This article presents an open-source four-switch Buck-Boost digital power supply based on STM32G474, supporting Type-C PD and DC input up to 48V10A and 450W. It includes schematic, PCB, firmware, and 3D model files. The design offers adjustable output, OLED display, protections, and host monitoring, achieving up to 94.3% efficiency and low ripple. Users can access calculations and source code.

发布于 2024-11-12

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