Other Parts Discussed in Thread: BQ25120A, BQ27220
Tool/software:
Hello we are making a wearable device and were looking at off the shelf options for the power circuitry. Our requirements are as follows:
1) 3.3V Low-Noise Output: Continuous output with a maximum peak current of 600 mA, frequent surge currents of 300 mA, nominal operating current of 50 mA, and low-power mode current of 10 mA.
2) Battery Management: Support for charging two 3.7 V, 200 mAh Li-ion cells.
3) USB-C Input: 5 V input to charge the batteries as well as directly power the circuit.
4) Fuel Gauge: I²C-based fuel gauge for battery percentage monitoring.
5) Thermal Safety: Minimal heating (as the board will be close to skin) and automatic power cutoff at high temperatures.
6) Voltage Regulation: The circuit should maintain a continuous 3.3 V supply until the battery voltage drops below 3.3 V.
7) Form Factor: Small footprint design, fitting within 15 x 15 mm.
We are looking at TPS63000 as the regulator, BQ25120A for battery charging and BQ27220 for the fuel gauge. Wanted to know if this would be an ideal solution or if there is any better alternative, perhaps a single off the shelf package for this by TI.
