main power chip of 18W PD power module is u6108s. It is a high-performance current mode PWM power switch for off-line flyback converter applications.
In the u6108s, the PWM switching frequency with shuffling is fixed at 65khz and trimmed to a narrow range. The integrated circuit has built-in green and burst mode control functions, can realize light load and zero load, and its standby power consumption is less than 75MW.
U6108s integrates the following functions and protections: undervoltage locking (UVLO), VDD overvoltage protection (VDD OVP), cycle by cycle current limiting (OCP), short circuit load protection (SLP), overload protection (OLP), on-chip thermal shutdown (OTP), soft start, VDD clamping, etc.
18W PD power module adopts protocol chip u7636b, which is a multifunctional USB port controller integrating USB type-C, USB power delivery (PD) 3.0, qc3.0 / 2.0 class a fast charging protocol, Huawei FCP / SCP fast charging protocol, Samsung AFC fast charging protocol, bc1.2 DCP and Apple device 2.4a charging specification. It is an AC-DC adapter, mobile power supply Provide complete a + C port charging solution for on-board charger and other equipment.
The built-in type-C protocol of u7636b can support the insertion of type-C equipment into the Automatic wake-up system, and intelligently identify the forward and reverse insertion of the plug to realize the connection. The integrated type-C pd3.0 protocol supports bidirectional label coding (BMC), integrates the physical layer protocol and protocol engine of hardware, and does not require software to participate in encoding and decoding.
