CY33771C
USB PD3.1 EPR Sink Controller
Description
The CY33771C is a highly integrated USB Type-C® PD 3.1 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 Type-C Connector-equipped Devices (TCDs) through simple external resistor setting.
For a simple TCD without a system MCU, the CY33771C initiates desired power request by interpreting matching resistance values of the VSEL pin (voltage) and ISEL pin (current) after Power On Reset (POR), Table 2.
Based on high-voltage process, the CY33771C offers short-protection between CC1/CC2 pins to adjacent high-voltage pin up to 34V. Smart built-in firmware of the CY33771C offers comprehensive safety protection schemes, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and moisture detection between DP and DN. An LED indicator is used to show the PD power negotiation status. The automatic cable voltage drop compensation is implemented to cover practical usage situations. Meanwhile, the CY33771C can indicate the insertion orientation of the Type-C attachment.
For a simple TCD without a system MCU, the CY33771C initiates desired power request by interpreting matching resistance values of the VSEL pin (voltage) and ISEL pin (current) after Power On Reset (POR), Table 2.
Based on high-voltage process, the CY33771C offers short-protection between CC1/CC2 pins to adjacent high-voltage pin up to 34V. Smart built-in firmware of the CY33771C offers comprehensive safety protection schemes, including over-voltage protection (OVP), under-voltage protection (UVP), over-current protection (OCP), and moisture detection between DP and DN. An LED indicator is used to show the PD power negotiation status. The automatic cable voltage drop compensation is implemented to cover practical usage situations. Meanwhile, the CY33771C can indicate the insertion orientation of the Type-C attachment.
Features
- USB PD3.1 v1.6 certified with TID: 9960
- Operating voltage range of VCC: 3 V to 31V
- Supports PD 3.1 EPR/AVS up to 28V and SPR/PPS up to 21V
- Voltage/Current selections through resistors settings
- Support FLIP indication of the Type-C attachment
- Support OVP with hard reset and auto restart
- Support UVP and OCP with output power shut down
- Driver for output enable N-MOS switch
- Supports dead battery function
- Automatic cable voltage drop compensation
- VBUS short protection on CC1/CC2 pins up to34V
- Moisture detection between DP and DN
- LED indication for different negotiation results
- 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 PD 3.1 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 CY33771C, a USB Type-C power delivery sink controller, is used to request power from an attached USB PD source adapter through simple external resistor settings, as shown in the Figure 1 below.
After the POR initialization, the voltage and current requests are expressed by appropriate resistors connected to VSEL and ISEL pins, respectively. The CY33771C automatically evaluates all PDOs from PD Source capability and finds the matched PDO according to its internal matching criteria. If some of the PDO is matched, the MOS switch is turned on to connect VBUS to VOUT.
The CY33771C supports the dead battery function, and can be woken up as soon as a PD adapter is plugged in the TCD Type-C receptacle. After the power link is set up between source and sink, OVP, UVP, and OCP protections are enabled to monitor the power charging status. In addition, moisture detection between DP and DN is implemented during the cable insertion. In case power protection is triggered, the CY33771C shuts down the VOUT enable NMOS switch, and discharges the VOUT voltage. Meanwhile, the CY33771C provides an LED indication for the complicated system operating status, and support FLIP indication of the Type-C attachment orientation.
The CY33771C supports Type-C PD compliance charger (through Type-C to Type-C cable) or legacy Type-A charger (through Type-A to Type-C cable). The automatic cable voltage drop compensation is implemented to cover practical usage situations for TCDs as well.
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.
After the POR initialization, the voltage and current requests are expressed by appropriate resistors connected to VSEL and ISEL pins, respectively. The CY33771C automatically evaluates all PDOs from PD Source capability and finds the matched PDO according to its internal matching criteria. If some of the PDO is matched, the MOS switch is turned on to connect VBUS to VOUT.
The CY33771C supports the dead battery function, and can be woken up as soon as a PD adapter is plugged in the TCD Type-C receptacle. After the power link is set up between source and sink, OVP, UVP, and OCP protections are enabled to monitor the power charging status. In addition, moisture detection between DP and DN is implemented during the cable insertion. In case power protection is triggered, the CY33771C shuts down the VOUT enable NMOS switch, and discharges the VOUT voltage. Meanwhile, the CY33771C provides an LED indication for the complicated system operating status, and support FLIP indication of the Type-C attachment orientation.
The CY33771C supports Type-C PD compliance charger (through Type-C to Type-C cable) or legacy Type-A charger (through Type-A to Type-C cable). The automatic cable voltage drop compensation is implemented to cover practical usage situations for TCDs as well.
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 CY33771C PD 3.1 Sink Controller in a TCDFunctional Block Diagram
Figure 2. The Functional Block Diagram of CY33771C PD 3.1 Sink Controller