LI-ION Battery Chargers
The NB2-LI-ION and the ZB1-LI-ION design are Li-ion battery chargers
that is compatible with the NB2x, ZB1, NB1 and NB1A. The NB2-LI-ION
charger interfaces withe The NB2, NB2A and NB2AS microntroller boards.
The ZB1-LI-ION interfaces with the ZB1, NB1 and NB1A microntroller
boards. Each charger outputs a regulated 3.3VDC using either the
battery, USB port or the wall adapter.
The USB port and wall adapter are diode or'ed onto the input
voltage bus (VBUS). The three position toggle switch connects the
input of the 3.3V LDO to either the battery or VBUS. The
OFF
position is in the center. The output of the 3.3V LDO connects to the
external voltage input connector of the microcontroller board.
To retrofit an existing board ---
- Remove the or'ing diode and the optional external power header from the
microcontroller board.
- Mount the LI-ION charger to the microcontroller board using the #2 mounting
hardware.
- Wire the LI-ION to the microcontroller board using jumper wires (22AWG bus wire).
Features
- ON/OFF Toggle switch.
- 3.3V regulated output.
- 2mm header to connect the Li-ION cell (JST
S2B-PH-K-S)
- Mouting holes to mount the LI-ION charger directly to the
microcontroller board using #2 hardware.