Fast wireless charging and fast cable charging are both possible on Galaxy S7 and Galaxy S7 Edge. But to disable and turn off fast charging on Galaxy S7 Edge and avoid the battery's high temperature and less battery life due to the heat, you need to do as follows:
1. Open the Settings app on your Galaxy S7 Edge (S7)
2. Go to the Battery settings (Simply use the search box and type "Battery")
3. Now, under the Fast Charger settings, make sure to toggle off/on the Fast Cable Charging and Fast Wireless Charging to turn off/on fast charging on Galaxy S7 Edge and Galaxy S7.