What are the applications of EZ-PD™ CCG4?
Cypress offers single as well as dual port Type-C EZ-PD™ CCG4 controller. This Type-C port controller is fully compliant with Type-C and PD specification. CYPD4135-40LQXIT and CYPD4235-40LQXIT are single and dual Type-C port CCG4 Controllers respectively, which support DFP application such as power adapters. CYPD4125-40LQXIT and CYPD4225-40LQXIT are single and dual port Type-C CCG4 controllers for DRP applications such as notebooks and docking stations.
CCG4 integrates two Type-C transceivers and facilitates a dual port Type-C notebook design with a reduced BOM. In this application, CCG4 communicates with Embedded Controller (EC), which manages the Battery Charger Controller (BCC) to control the charging and discharging of internal battery. Both the Type-C ports can be either power providers or power consumers at the same or different times. Also, CCG4 transfers the DisplayPort signals over Type-C interface using display mux controllers. Figure 1 shows the dual port Type-C notebook design using CCG4 (CY4225-40LQXIT).
Figure 1: Dual Port Type-C Notebook Design Using CCG4
In a docking station design, the Type-C port at the upstream of the hub gets connected to the downstream Type-C port of the attached notebook. Any other TypeC device can be connected to the notebook over the Type-C port at the downstream of the hub (in the Docking station). EZ-PD CCG4 integrates two Type-C transceivers and facilitates the dual Type-C port docking station design with a reduced BOM as it integrates two Type-C transceivers. Figure 2 shows the docking station design using CCG4.
Figure 2: Docking Station Design Using CCG4
Dual port Type-C power adapter facilitates charging of two devices at the same time. Both devices can establish power contract with power adapter independent to each other. For example, power adapter can provide 15 W power (5 V, 3 A) to the device connected to Type-C Port 1 and at the same time, it can provide 60 W power (12 V, 5 A) to the device connected to Type-C port 2. CCG4 has the capability to control both the Type-C interfaces simultaneously and thus it is an ideal solution for dual Type-C power adapter design. Figure 3 shows block diagram of DFP application such as dual Type-C port power adapter.
Figure 3: Dual Port Type-C Power Adapter Design using CCG4
In this application, CCG4 is used as DFP (power provider) only. CCG4 integrates all termination resistors and uses GPIOs (VSEL0 and VSEL1 per Type-C port) to program the power regulator and to supply the appropriate VBUS based on the power consumer’s requirement. The VBUS voltage on each Type-C port is monitored using internal ADC to detect under voltage and over voltage conditions on VBUS. To ensure quick discharge of VBUS when power adapter cable is detached, a discharge path is provided with a resistor and FET controlled using CCG4.