Dell Precision 7730 without dGPU, working with 65W or 90W charger?

Hello
I have a Dell 7730 with i5 8300H on my wishlist. It doesnt have dedicated graphic card only iGPU. The power draw is listed 45W for processor and 15W for iGPU. Does anyone has experience, if it is possible to use 65W charger or maybe 90W one? It comes with 230W brick which is just to big.
Thanks for the answers.