Building the ultimate USB power distribution system

Dr. Scott M. Baker published a new build: My goals include: 1. The ability to switch each device on/off with a rocker or toggle switch 2. Current limiting capability via a fuse or similar device 3. Overvoltage protection 4. Visual indicator (LED) of operational status 5. Multiple independent outlet See the full post on his […]

App note: Charging batteries using USB power

Fairly old application note from MAXIM Integrated about getting out power from USB ports. Link here (PDF) Many devices with rechargeable batteries use USB power to recharge the batteries while they are connected. This application note describes the power available from USB and how it can be used to charge batteries, including circuits and some […]

App note: Enable automotive USB power – Managing the increasing currents, longer cables, and tight portable-device specifications

Here’s an application note from Maxim:  Enable automotive USB power – Managing the increasing currents, longer cables, and tight portable-device specifications This application note discusses the challenges of rapid USB charging of today’s portable devices (PDs) in an automobile. The PDs may not charge quickly or charge at all, especially the more recent power-hungry devices. […]

FT230X charger detection investigation

Baoshi writes: I bought some FT230X (FT230XS) USB-USART bridge chip recently for a new design.  FT230X is not only cheaper than the traditional FT232RL, but also offers a new fancy “USB charger detection” function. This interests me because I’m quickly running out of desk space and power socket. I wish the new device to be […]