BQ25703A: Where is ICO ( Input Current Optimizer ) description BQ25703A data sheet ??

Part Number: BQ25703A

Hi 

Our customer has question for ICO function BQ25703A .

But I cold not find  ICO description  at data sheet.

Could you tell us ICO function with BQ25703A ?? 

Thanks and Regard

March Jasper  (  Japan Disty  Sugimoto )