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Part Number: TUSB320
Q1 I have a new dongle product which has one DC power source connector and a type-c connector . When there is no DC power source ,the the type-c of the product is in UFP mode and it can be charged by the type-C , 5V/1.5A is enough. When there is a DC power source ,the type-c of the produce is in DFP mode, the prodocut acts as a type-c powre charger ,the output is 5v/3a max .It can charge some mobile devices such as IPHONE, macbook .Do you have a good IC to be adviced.
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Q1 response: The TUSB320LAI/HAI can be used for this application for Type-C only support. The TPS65987D is a good part if you require USB PD support.
Q2 response: The TUSB Today's iPhone doesn't implement Type-C. iPhone use DP/DM lines in a Apple proprietary manner to negotiation higher than 500mA charge current. You will need a device like TPS2514 to charge devices which only use the DP/DM lines. For devices which use Type-C advertised current instead of DP/DM, the TUSB320LAI can be used to indicate the Type-C charging capability of the charger.
Q3 response: The TUSB422 or the TPS65987D both support PD. The TPS part integrates all the necessary PD logic while the TUSB422 is a PD phy only. If you use TUSB422 all PD logic such as load switches, MCU, etc.. must be implemented discretely. If you Plug in a device which doesn't support PD or USB-C, like a iPhone, then charge current will be determined by DP/DM. The charge current maybe 500mA or it could be higher if your charger supports QC or Apple proprietary method.
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