In medium microwavable bowl, place chocolate chips. In 1-quart saucepan, heat 3/4 cup whipping cream over medium-low heat 3 to 5 minutes or until hot. Pour cream over chocolate chips in bowl; let stand 5 minutes. Stir until smooth. If needed, microwave chocolate-cream mixture uncovered on Medium (50%) in 15-second increments until chocolate can be stirred smooth. Remove tart from refrigerator. Pour chocolate mixture over caramel layer. Return to refrigerator uncovered, about 2 hours or until chocolate is set.