Hello Arduino lovers!
Please help me as I can't read schematics.
I have an Arduino MKR 1310 connected to Adafruit's [ USB/DC/Solar Lithium Ion/Polymer charger - v2 ], from which I connect a solar panel and a battery.
The solar panel uses seeed studio's [ Small Solar Panel 116x160mm 2.5W ], and the voltage is 5.5V.
The problem is that [USB/DC/Solar Lithium Ion/Polymer charger - v2] may flow the current of solar panel to Arduino as it is.
The Arduino MKR 1310 uses the BQ24195L, which I believe can withstand up to 17V input.
Therefore, is it okay if 5.5V flows from the Li-Po terminal?
This sentence is a machine translation, so I apologize if the English is difficult to read.
Dimensions: 160x116x2.5(±0.2) mm
Typical voltage: 5.5V
Typical current: 450mA
Open-circuit voltage: 8.2 V
Maximum load voltage: 6.4V
A single solar cell generates 0.5 to 0.6V approx. and the voltage is strictly limited by the nature of the material. So there is no way your solar panel can produce a voltage higher than around 8V (open circuit) at normal temperatures.
Since the charger board is designed to work with arduino's I'd be very surprised if it could output a damaging voltage.
Thanks for the addition and reply.
I became aware of this problem because the tutorial has the following explanation:
The smart load sharing means that the LOAD output can be as high as 6VDC if in direct sun because it will draw current directly from the 6V panel instead of from the battery. If using this with an electronic project, make sure it is OK for up to 6VDC input or use a low-dropout-regulator (LDO) to regulate the voltage down.