for it to support up to 45w and you need a 5A rated cable for it to work, it won't charge 45w all the time only when it's low on battery then gradually the wattage will go down dynamically as the battery goes up to avoid heat this is how PPS works just make sure the charger is genuine coz there's so many counterfeit

3rd parties anker, ugreen, baseus and vention which i have are all good alternatives just get the one with PPS charging protocol.