Is it ok doubler circuit for powering nRF52832 custom board

[vishal]

Hello Everyone,

I have developed my application using BLE for connect android mobile. I have design complete PCB using your reference design. But i have littele confused in power supply schematic because i have use MCP1640 doubler IC, and use only one AA 1.5V battery and converted to 3.3V. my question is i have this attached schematic to powering Nordic chip. Is it sufficient for continuously power to nRF52832 or i need to add any other components with this circuit. I just verify this circuit and hope it will not cause problem in future. I have tested this circuit in general purpose PCB its working fine and that's why i am using in my final design. Any extra energy consumption due this doubler circuit my device current consumption is 4mA-6mA. Please give your valuable suggestion for should i use this.

[vishal]

Thanks sir for your reply, I use 10K resistor it is better for me, One of the other problem is for doubler IC MCP1640 i test the current consumption of my single AA battery. The result is different consumption like if i put full charge battery i measure current at MCP1640 input side is 15mA. 2. If i put 1.2V battery current consume is 22mA. 3. If i put low means 1 V battery charge battery the current consumption is increase near about 40mA. Why is happen i think it depend on MCP1640 efficiency, is it possible to increase doubler efficiency upto 90%. As per my measurements as battery voltage discharge the current consumption is increase. Please sir how i can avoid this problem. Because we need to use single AA 1.5v Battery for power supply due easily accessible in India and also battery life is important. Thanks........