PAL to Ntsc conversion

How do I convert my Pal playstion to work on an Ntsc T.V? I know a lot of the cheap converters are o.k for small T.V’s but what about the larger ones (say 46″)? Could you recommend a converter that would work well for this scenario. Don’t want to replace playstation as it has been chipped and have to many games that won’t work on a non chipped system.
Thanks.