CY33772S
USB PD3.1 EPR Sink Controller With I2C Interface
Description
The CY33772S is a highly integrated USB Type-C® PD3.1 sink controller to support Extended Power Range (EPR) / Adjustable Voltage Supply (AVS) up to 28V and Standard Power Range (SPR) / Programmable Power Supply (PPS) up to 21V. The device is targeted for DC power request and control for flexible Type-C Connector-equipped Devices (TCDs) with an embedded host MCU (Micro Controller Unit) and I2C interface pins (SCL, SDA).
Through the I2C interface interaction and interrupt mechanism, the host MCU sets up proper desired power profile with relevant threshold parameters and delegates PD negotiation tasks to the CY33772S. The host MCU further inquiries about status of various I2C registers for intended applications.
Based on high-voltage process, the CY33772S offers short-protection between CC1/CC2 pins to adjacent high-voltage pin up to 34V. Smart built-in firmware of the CY33772S offers comprehensive safety protection scheme, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and moisture detection between DP and DN pins. In addition, over-temperature protection (OTP) and thermal de-rating are supported by an external NTC resistor.
An LED indicator is used to show the PD power negotiation status, and the automatic cable voltage drop compensation for a long cable is implemented to cover practical usage situations.
Through the I2C interface interaction and interrupt mechanism, the host MCU sets up proper desired power profile with relevant threshold parameters and delegates PD negotiation tasks to the CY33772S. The host MCU further inquiries about status of various I2C registers for intended applications.
Based on high-voltage process, the CY33772S offers short-protection between CC1/CC2 pins to adjacent high-voltage pin up to 34V. Smart built-in firmware of the CY33772S offers comprehensive safety protection scheme, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and moisture detection between DP and DN pins. In addition, over-temperature protection (OTP) and thermal de-rating are supported by an external NTC resistor.
An LED indicator is used to show the PD power negotiation status, and the automatic cable voltage drop compensation for a long cable is implemented to cover practical usage situations.
Features
- USB PD3.1 v1.6 certified with TID: 10062
- Operating voltage range of VCC: 3 V to 31V
- Support PD3.1 EPR/AVS up to 28V and SPR/PPS up to 21V
- Support OVP with hard reset and auto restart
- Support UVP and OCP with output power shut down
- Support OTP and thermal de-rating through NTC resistor
- VBUS short protection on CC1/CC2 pins up to 34V
- I2C commands for external MCU monitoring, control, and parameter programming
- Dedicated pins for CC Flip indication and interrupt request.
- Dedicated pin for direct FAULT control of VBUS MOS switch
- Moisture detection between DP and DN
- LED indication for different negotiation results
- Driver for output enable N-MOS switch
- Support dead battery function
- Automatic cable voltage drop compensation
- Support legacy Type-A charger with Type-A to Type-C cable
- Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
- Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
W-QFN4040-24 (Type A1)Applications
- USB Type-C Connector-Equipped Battery-Powered Devices
- USB Type-C Connector-Equipped DC-Power Input Devices
- USB PD3.1 Testers
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. Please contact http://www.canyon-semi.com.tw for more information of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
USB Type-C® and USB-C® are registered trademarks of USB Implementers Forum.
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. Please contact http://www.canyon-semi.com.tw for more information of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.
USB Type-C® and USB-C® are registered trademarks of USB Implementers Forum.
Typical Applications Circuit
The CY33772S is a USB Type-C power delivery sink controller used to request power for a typical TCD embedded with a host MCU from an attached USB PD charger, as shown in the Figure 1 below.
Once the cable attachment is completed, the CY33772S is powered from VCC pin, and starts to do power-on initiation by setting up its internal registers and receiving the TCD configuration parameters from the external host MCU via I2C interface. After the power-on initialization, the CY33772S starts to decode USB PD commands from CC pin, and gets the PD source capability. The host MCU makes a choice of the source PDOs, and sends this requested PDO to the CY33772S through I2C command.
The CY33772S then automatically initiates the PD negotiation progress with the attached Type-C PD compliance charger (through Type-C to Type-C cable) or legacy Type-A charger ( through Type-A to Type-C cable). If the PDO is matched, the MOS switch is turned on to connect VBUS to VOUT, and then the source adapter successfully provides power to the CY33772S-embedded TCD device.
The CY33772S supports the dead battery function, and can be woken up as soon as an active PD adapter is plugged in the TCD Type-C receptacle. After the power link is set up between source and sink, OVP, UVP, OCP, and OTP protections are enabled to monitor the power charging status. In case power protection is triggered, the CY33772S shuts down the VOUT enable NMOS switch, and the host MCU will need to load new PD_REQMSG to start a PDO negotiation process to resume charging operation.
The back-to-back N-MOS switches shown in Figure 1 could be simplified to a simple N-MOS switch for the TCD when there is no concern on reverse current from power module back to VBUS.
Once the cable attachment is completed, the CY33772S is powered from VCC pin, and starts to do power-on initiation by setting up its internal registers and receiving the TCD configuration parameters from the external host MCU via I2C interface. After the power-on initialization, the CY33772S starts to decode USB PD commands from CC pin, and gets the PD source capability. The host MCU makes a choice of the source PDOs, and sends this requested PDO to the CY33772S through I2C command.
The CY33772S then automatically initiates the PD negotiation progress with the attached Type-C PD compliance charger (through Type-C to Type-C cable) or legacy Type-A charger ( through Type-A to Type-C cable). If the PDO is matched, the MOS switch is turned on to connect VBUS to VOUT, and then the source adapter successfully provides power to the CY33772S-embedded TCD device.
The CY33772S supports the dead battery function, and can be woken up as soon as an active PD adapter is plugged in the TCD Type-C receptacle. After the power link is set up between source and sink, OVP, UVP, OCP, and OTP protections are enabled to monitor the power charging status. In case power protection is triggered, the CY33772S shuts down the VOUT enable NMOS switch, and the host MCU will need to load new PD_REQMSG to start a PDO negotiation process to resume charging operation.
The back-to-back N-MOS switches shown in Figure 1 could be simplified to a simple N-MOS switch for the TCD when there is no concern on reverse current from power module back to VBUS.
Figure 1 – Typical System Configuration of CY33772S PD3.1 Sink Controller in a TCDFunctional Block Diagram
Figure 2 – The Functional Block Diagram of CY33772S PD3.1 Sink Controller