For the Bluetooth Low Energy products, many manufactures choose TI Bluetooth chipset. Especially some small devices, including the smart lock, Medical device, Smart Wearable, Bluetooth beacon and so on. Currently, the chipset TI CC2640 and TI CC2540 are very popular in the Bluetooth Low Energy Product. The chipset TI CC2640 is Bluetooth 5.0 Low Energy Technology , and the TI CC2540 is Bluetooth 4.2 Low Energy Technology.
Here are some information about the Bluetooth chipsets: