RTS5452E

General Description

The RTS5452E is an advanced Type-C Power Delivery Controller that integrates all Type‑C Channel Configuration (CC) functions, Power Delivery functions (including BMC PHY, protocol, policy engine and device policy manager), AUX/HPD detection blocks, SBU switch, BC1.2, USB2.0 MUX (2:1), and VCONN switch into a single chip. New features in the PD3.0 specification including Fast Role Swap, Extended Message transmission, and PD FW update are implemented in the RTS5452E.

The SBU switch is used for Type-C SBU1/2 polarity swap in alternate modes (e.g. DisplayPort and Thunderbolt). The AUX and HPD detection blocks are used for detecting DP cable hot plug and HPD signals in order to support DisplayPort alternate mode. USB2.0 MUX (2:1) is used for routing the Host USB2.0 DP/DM and the internal USB Billboard device DP/DM to the Type-C port DP/DM.

The built-in VCONN switch is used for CC to source VCONN power. It incorporates an overcurrent protection function. When power consumption is greater than the preset threshold, the VCONN switch will limit the current to a set value, and turn off after a configurable debounce time.

The RTS5452E provides a battery charging function that supports USB Battery Charging specification rev1.2.

The RTS5452E firmware supports USB Type-C Specification Release 2.0 and the Power Delivery specification R3 V2.0. All the configurations such as power roles, data roles, and current modes of the Type-C port can be configured by firmware. The RTS5452E has various interfaces to communicate with other components, such as GPIO, I2C, and SMBUS, offering the flexibility to extend various applications, and provide Type-C USB Power Delivery to any architecture. The RTS5452E’s SMBUS/I2C slave interface system can implement system control achieving all Power Delivery related functions, such as Cable detection, Power Negotiation, Power Swap, Data Swap, VCONN Swap, etc. The RTS5452E can be statically configured via SMBUS for customized extra functions.

Via the I2C master interface, the RTS5452E can control/configure other chips in the system, such as PMIC with I2C, etc. The RTS5452E can update its firmware using embedded SPI flash via flexible ISP channels. The ISP function allows configuration of multiple features and settings and is easy to use with USB/SMBUS/CCs download tools.

The RTS5452E adopts an industry standard 32-pin QFN 4mm*4mm green package.