The RT7885 is a USB Power Delivery (USB PD) controller adopting bi-directional Buck-Boost PWM control scheme with highly integrating functions specially for USB power bank applications. The controller is designed to operate in peak current mode with programmable current limit and programmable switching frequency. It embeds an ARM Cortex™-M0 MCU to facilitate various functions of communication protocols, protections and customized requirements. It can support charge/discharge power management of one to four multi-cell lithium ion/lithium polymer battery, bi-directional voltage buck/boost control, input/output current/voltage regulation and battery balance management between two cells. Apart from supporting USB Type-C and PD protocol, the RT7885 can also support USB Type-A ports connected to conventional devices for various proprietary protocols.
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