I am struggling to find a solution for the project I am working on.
The circuit is powered directly from two 3V lithium batteries connected in parallel. The average power consumption of the circuit is around 10-20uA with some short current bursts up to 200mA. The circuit consists out few peripherals (BLE, MCU & etc.) and several indication LEDs. LEDs brightness should not vary significantly. System operational voltage is from 2.5V to 3.2V (estimation from the battery specs, components can handle up to 3.6V).
- Is there any way to protect batteries from cross charging without a significant increase in power consumption of the circuit? And without significant voltage drop?
- The best simplest and cheapest way to drive the LEDs (10-20mA LEDs) with a forward voltage of around 1.9V to 2.1V. As when the battery is new the current will be higher and brightness will be higher and vice versa. So at 2.5V brightness will be significantly lower. Any kind of low power LED driver with the low quiescent current. Any suggestions?
Thank you in advance.