Other Parts Discussed in Thread: CC3220SF-LAUNCHXL, BQ24650EVM-639, BQ25570EVM-206, , BQ24650, BQ27520
Hi, I have purchased BQ24650EVM-639, CC3220SF-LAUNCHXL, OPT3001DNPT, and HDC2080DMBT from Digikey.
My team is trying to create an outdoor Wi-Fi ambient tracking application.
I also ordered a 3.5 Watt 6 Volt solar panel. (Open Circuit Voltage: 7.7V, Peak Current: 550mA)
This is the battery, which I bought from Adafruit, I'm trying to charge; Lithium Ion Battery Pack - 3.7V 2200mAh (PRODUCT ID: 1781)
SHENZHEN PKCELL BATTERY CO, Model：ICR18650 2200mAh 3.7V 1S1P
This is the detailed specification
Compared to BQ25570EVM-206, I need to add a buck converter to supply 1.8V or 3.3V.
Also, I wish to track the remaining battery capacity (mAh), state-of-charge (%), run-time to empty (min.), battery voltage (mV), and temperature (°C) with TI's battery fuel gauges ICs.
Q0. Since BQ27501 is in NRND (Not Recommended for New Designs), what could be an alternative for my case?
Q1. I'm looking for a buck converter from TI that
- 1 regulated output
- adjustable Vout; I will use voltage divider resistor to create 2.9V or 1.8V system power (or fixed 1.8V)
- max current output: 150mA
- don't want ball grid array type of packages
- low power consumption
Can you give a recommendation to me with this, please?
Since the BQ24650 is using the 600-kHz NMOS-NMOS Synchronous Buck Controller, I think the switching frequency might be another issue.
Q2. I'm new with the battery gauge devices from TI. After getting a recommendation, what will be the connection when using
. the solar charger
- buck converter
- battery gauge