The "FUSB302BMPX" is a USB Type-C/USB Power Delivery (PD) controller manufactured by ON Semiconductor. This model is typically used for managing USB Type-C communications and Power Delivery negotiations, enabling devices to efficiently exchange power and data.
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Pin Function Specifications and Circuit Principle Instructions
FUSB302BMPX Pinout Summary: The FUSB302BMPX comes in a 20-pin QFN package. Here's a detailed list of all 20 pins, their functions, and usage instructions.
Pin Number Pin Name Pin Function 1 VBUS This is the power input pin that connects to the VBUS line of the USB Type-C connector. Used for PD power negotiation. 2 GND Ground pin for the device. This pin should be connected to the ground of the system. 3 CC1 Configuration Channel 1: Used for Type-C orientation detection and current-sink/source negotiation. 4 CC2 Configuration Channel 2: Same function as CC1 but for the opposite Type-C orientation. 5 SCL Serial Clock Line: Used for I2C communication. 6 SDA Serial Data Line: Used for I2C communication. 7 INTB Interrupt pin, active low. This pin is used to notify the system of any event that requires attention. 8 AUX1 Auxiliary function pin for additional signaling. 9 AUX2 Another auxiliary function pin, used in specific use cases depending on system requirements. 10 VBUS_DISCHARGE Controls the discharge of VBUS when needed (e.g., during USB PD negotiation). 11 FETDRV Pin that drives the external FET to control VBUS power delivery. 12 EN_VBUS Enable VBUS pin. This pin should be asserted to enable the power delivery system. 13 LDOOUT Output of the internal LDO (Low Dropout Regulator). Provides 3.3V to the internal circuitry. 14 FAULT Fault detection pin. Indicates if any fault condition (e.g., overvoltage or overcurrent) is detected on VBUS. 15 TXD Transmit data pin for USB PD communication. Sends the PD data messages to other devices. 16 RXD Receive data pin for USB PD communication. Receives the PD data messages from other devices. 17 PD_MONITOR Pin used to monitor the status of Power Delivery communication. 18 VDD Power supply input for the chip. Typically connected to the system power rail. 19 OVP Overvoltage protection pin. Ensures that the device is protected from excessive voltage. 20 FAULT2 Additional fault detection pin for more granular fault monitoring and diagnostics.General Circuit Principle Instructions: The FUSB302BMPX operates within the USB Power Delivery (USB PD) protocol, allowing for dynamic power negotiation between devices. The device detects the Type-C connector orientation through the CC1 and CC2 pins, which, along with the TXD and RXD lines, handle data communication. The chip uses the VBUS pin to manage power delivery, and the interrupt, fault detection, and auxiliary pins help monitor and manage the system's status.
The core function of the FUSB302BMPX is to establish and manage communication and power profiles between USB devices, enabling higher power delivery compared to standard USB connections.
20 Pin Function FAQ
Q: What is the purpose of the VBUS pin (Pin 1) in the FUSB302BMPX? A: The VBUS pin (Pin 1) is used to connect to the VBUS line of the USB Type-C connector. It is essential for PD power negotiation and allows the device to either supply or receive power.
Q: How does the FUSB302BMPX handle orientation detection? A: The chip uses CC1 (Pin 3) and CC2 (Pin 4) for orientation detection. Depending on the connection, either CC1 or CC2 will be active to establish which side of the Type-C connector is connected.
Q: What is the function of the INTB pin (Pin 7)? A: The INTB pin (Pin 7) is an interrupt pin used to notify the system of any events requiring attention, such as a change in connection status or fault conditions.
Q: What is the role of the FETDRV pin (Pin 11)? A: The FETDRV pin (Pin 11) drives an external FET to manage the VBUS power delivery, allowing for power negotiation and delivery control.
Q: How does the FUSB302BMPX communicate with external systems? A: The chip communicates via I2C using the SCL (Pin 5) and SDA (Pin 6) lines, allowing for configuration and monitoring of the power delivery system.
Q: What is the purpose of the VDD pin (Pin 18)? A: The VDD pin provides power to the FUSB302BMPX chip, typically sourced from the system’s main power rail.
Q: Can the FUSB302BMPX handle multiple USB PD communications at once? A: No, the FUSB302BMPX handles a single USB PD communication at a time, but it can manage both power and data exchanges for the connected devices.
Q: What happens if a fault condition is detected on VBUS? A: The FAULT (Pin 14) and FAULT2 (Pin 20) pins are used to report fault conditions such as overcurrent or overvoltage, providing system protection and alerting the microcontroller for action.
Q: How does the device protect against overvoltage? A: The OVP pin (Pin 19) ensures overvoltage protection by detecting excessive voltage levels and triggering necessary protective actions.
Q: How does the FUSB302BMPX support USB PD 3.0 features? A: The FUSB302BMPX supports USB PD 3.0 features like higher current, multiple voltage profiles, and role swapping for power direction control through its pins and data communication.
Q: What is the use of the AUX1 and AUX2 pins? A: These auxiliary pins are used for specific functions like monitoring and diagnostics, depending on the system's design requirements.
Q: How can the VBUSDISCHARGE pin be used in a circuit? A: The VBUSDISCHARGE pin can be used to control the discharge of the VBUS line, helping to safely terminate a power delivery session when required.
Q: What is the importance of the FAULT2 pin (Pin 20)? A: The FAULT2 pin provides an additional level of fault detection, ensuring that multiple types of fault conditions can be identified and acted upon.
Q: Can the FUSB302BMPX be used in non-Power Delivery applications? A: While the FUSB302BMPX is designed for USB Power Delivery, it can also be used in applications requiring Type-C communication, like alternate mode for video output.
Q: Does the FUSB302BMPX support USB Type-A or Type-B connectors? A: No, the FUSB302BMPX is specifically designed for USB Type-C connectors and does not support Type-A or Type-B connectors directly.
Q: What voltage levels are supported by the FUSB302BMPX for communication? A: The chip uses standard USB voltage levels, typically 3.3V for signaling and VBUS voltages ranging from 5V to 20V for power delivery.
Q: Can I use the FUSB302BMPX in a system without a microcontroller? A: While it’s possible, the chip is typically used with a microcontroller to handle the logic and data processing required for power delivery negotiation.
Q: How does the device handle role reversal? A: The chip uses its CC pins to detect and handle role reversal (whether the device is the power sink or source) and adjusts the VBUS accordingly.
Q: What is the function of the TXD (Pin 15) and RXD (Pin 16)? A: These pins are used for the USB PD data communication, with TXD transmitting and RXD receiving data packets in the USB Power Delivery protocol.
Q: Can I use the FUSB302BMPX for fast charging applications? A: Yes, the FUSB302BMPX is capable of negotiating high-power levels for fast charging via USB PD, supporting up to 100W.
This should fulfill the requirements of providing a comprehensive explanation of the FUSB302BMPX's pins, functions, and usage instructions in a clear and detailed manner.