Open Source Nokia BL series power module
Engineering & Technical Design pcb-design,altium-desiger,systems-development
The goal of this project was to make an universal charger and power supply module for the Nokia BL-series style lithium ion battery.The system is optimized for low quiescent current (~86uA) and high efficient power delivery of 5V 1A and 3.3V 1A with an average power supply efficiency of 94% !The module has an ideal type diode approach to make sure the switching from battery power to external power goes in an uninterrupted fashion with ultra high efficiency. This has lowered the power loss the normal schottky diode approach has which was around 190mW at 400mA load to a stunning 40uW.
The module is currently in prototype stage. When all the specs are validated it will be available to order.
The documentation is currently under development.
This is the top view of the OpenBL-5C prototype pcb
This is the bottom view of the OpenBL-5C prototype pcb.