2025 – Beyondlogic

Review: USB-PD 65W Fast Charging Module (XPM52C)

July 10, 2025 Craig Peacock 0

This USB-PD (Power Delivery) Charging module is based on the XPM52C 65W USB-PD Multi-protocol Buck Converter. It allows USB devices (mobile phones, tablets, laptop computers, cameras etc) to be efficiently charged from a low voltage DC power source (8 to 30V DC) such as 12V/24V battery or power station. While my interest was in the USB-C power delivery capability, the device supports a range of legacy fast-charging protocols: This module is available from your usual cheap electronics sources such as AliExpress, Amazon, and Banggood. As the vendors normally don’t list the main part in their descriptions, search for “PD 65W …

Review: Low Voltage 12 – 85V DC/AC E27 Light Bulb

July 7, 2025 Craig Peacock 0

In off-grid systems, it can make sense to use a low voltage DC light bulb, instead of having the overheads of a DC to AC inverter – in terms of capital cost, quiescent (idle) current, conversion efficiency and risk of electrocution. For example, in a shed or other de-attached structure you could have a small 12V or 24V PV Solar system and run your lighting directly from that source. LED bulbs exist in standard E27 (Edison screw, 27mm) and B22 (Bayonet cap, 22mm) that can be powered from lower voltages – typically 12V, 24V or 48V. We review one such …

Review: USB-C Power Delivery Trigger Board (CH224)

June 30, 2025 Craig Peacock 0

Depending upon their capability, USB-C PD adapters and chargers can source a variety of different voltages and currents. This is typically 5V, 9V, 12V, 15V and 20V up to 100W (for PD version 3.0). The adapter will initially provide either 5V (to support legacy protocols) or no voltage at all (if USB-C PD only). To obtain 5V or a higher voltage, the sink device needs to request this. For USB Power Delivery, the mechanism is that the source (adapter) will advertise its capabilities through a series of PDO or power delivery objects and the sink will request the desired voltage …