onsemi FUSB302B11MPX

Overview

FUSB302B11MPX from onsemi is a USB Type-C port controller IC implementing BMC physical layer, CC detection, DRP toggle logic, VCONN power switch, and USB Power Delivery 2.0 protocol engine. It supports 100 W PD negotiation, dual-role port (DRP) operation, and operates from 2.7 V to 5.5 V supply. Used in smartphones, laptops, and portable chargers for robust, standards-compliant USB-C connectivity.

For engineers reviewing the FUSB302B11MPX datasheet, pinout, applications, or equivalent options, key selection criteria include its 14-lead MLP package, I²C interface with Fast Mode Plus support (up to 1 MHz), integrated 48-byte Tx/Rx FIFO for PD messaging, programmable VCONN OCP (600–1000 mA), and configurable CC pull-up/pull-down currents (80/180/330 µA).

Technical Context

The FUSB302B11MPX implements a full BMC physical layer with 4B5B encoding/decoding, CRC32 generation/checking, and automatic GoodCRC response when AUTO_CRC is enabled. Its dual CC channel interface supports orientation detection, attach/detach sensing, and accessory identification via Ra/Rd voltage thresholds (0.20–1.23 V).

It integrates a 6-bit MDAC for precise CC and VBUS voltage measurement (42 mV/step for CC, 420 mV/step for VBUS), programmable comparator hysteresis, and hardware-controlled VCONN switching with thermal shutdown at 145 °C and 10 °C hysteresis.

Key Specifications

Pinout & Package

Package: 14-lead MLP (2.5 mm × 2.5 mm, 0.5 mm pitch), moisture sensitivity level 1, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB Type-C port controller applications.

Compared with TUSB320LAIRTER and IP2721, the FUSB302B11MPX delivers hardware-accelerated DRP toggle, integrated VCONN switching with OCP, and USB PD 2.0 compliance in a compact 14-pin MLP-making it optimal for cost-sensitive, space-constrained dual-role portable designs needing proven interoperability.

Availability

FUSB302B11MPX is available at Aetrix Electronics and suitable for smartphone charging ports, laptop docking stations, portable power banks, and USB-C monitor hubs requiring stable component supply across industrial temperature ranges.

Supply support for FUSB302B11MPX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The FUSB302B11MPX belongs to onsemi's USB Type-C port controller product line, engineered specifically to simplify USB-C implementation by integrating BMC PHY, CC logic, DRP state machine, and VCONN power management into a single, production-ready IC.

FAQ

What is the primary function of the FUSB302B11MPX in a USB-C design?

The FUSB302B11MPX serves as a dedicated USB Type-C port controller IC. It handles CC line detection, orientation sensing, VCONN power switching, BMC-based USB Power Delivery 2.0 messaging, and hardware-assisted DRP role toggling. In a complete system, the FUSB302B11MPX offloads low-level USB-C protocol handling from the main processor, enabling reliable, standards-compliant connectivity without requiring custom firmware for physical layer operations.

Does the FUSB302B11MPX support USB Power Delivery 3.0 or Programmable Power Supply (PPS)?

No, the FUSB302B11MPX implements USB Power Delivery 2.0 only. It does not support PD 3.0 features such as PPS, extended messages, or fast role swap. Its BMC engine, FIFO structure, and register set are aligned with the PD 2.0 specification. For PD 3.0 or PPS capability, designers must select alternative controllers such as onsemi's FUSB303B or third-party ICs explicitly certified for PD 3.0 compliance.

How does the FUSB302B11MPX handle VCONN power delivery and protection?

The FUSB302B11MPX integrates a dedicated VCONN power switch capable of delivering up to 560 mA at 5 V. It features over-current protection (OCP) with a programmable trip threshold of 600–1000 mA, soft-start timing (~1.5 ms), and thermal shutdown at 145 °C with 10 °C hysteresis. The VCONN output is routed to either CC1 or CC2 based on cable orientation, controlled via VCONN_CC1/VCONN_CC2 bits in the Switches0 register (0x02). This eliminates external discrete components for VCONN management.

What I²C address does the FUSB302B11MPX use, and how is it determined?

The FUSB302B11MPX uses I²C slave address 0x4A (7-bit address, read/write bit excluded). This is confirmed by Table 15 in the datasheet: bits [7:1] = 0b0100101, corresponding to part number FUSB302B11MPX. The address is hardwired and cannot be changed via pins or registers. Host systems must initialize I²C communication using this fixed address to access configuration registers, status flags, and FIFO buffers.

Can the FUSB302B11MPX operate without an external microcontroller?

No, the FUSB302B11MPX requires an external host processor for full functionality. While it contains hardware logic for DRP toggle, BMC encoding/decoding, and VCONN control, all configuration (e.g., HOST_CUR, POWERROLE, AUTO_CRC), interrupt handling, and PD policy decisions reside in host firmware. The FUSB302B11MPX communicates exclusively via I²C and relies on the host to write registers, read status, and manage the PD state machine - it is not a standalone, firmware-integrated solution.