Preheat oven to 350. Spray 13x9 baking dish with cooking spray. Mix cream cheese, sour cream and chicken broth in large bowl until well blended. Add potatoes, ham, peas, and 1 3/4 cups cheddar cheese. Stir gently to coat all ingredients.
Spoon into prepared baking dish. Sprinkle with remaining 1/4 cup cheese.
Bake 1 hour or until heated through and potatoes are tender.