I have a solar USB charger project I am working on with my 14 year old son to use when we are camping. I could buy one but what fun is that.
The boost converter has an ENABLE CONTROL (active high (>.96 V)). I currently have that tied into the Vcc (Power in) per the data sheet. I notice after I unplug the phone from the charger, the circuit is still pulling about 4 mA and drains the battery if not used at night. Also there are no LEDs in the circuit that may be drawing any power.
Is there any easy way I can make the Enable LOW (< .6 V) when the system is drawing say less than 10mA? This is such a small amount of power but when charging from solar, I need all I can get. I don't want to use a switch if at all possible and the simpler the better.
You help would be appreciated!
The boost converter has an ENABLE CONTROL (active high (>.96 V)). I currently have that tied into the Vcc (Power in) per the data sheet. I notice after I unplug the phone from the charger, the circuit is still pulling about 4 mA and drains the battery if not used at night. Also there are no LEDs in the circuit that may be drawing any power.
Is there any easy way I can make the Enable LOW (< .6 V) when the system is drawing say less than 10mA? This is such a small amount of power but when charging from solar, I need all I can get. I don't want to use a switch if at all possible and the simpler the better.
You help would be appreciated!