Infineon EZ-PD CY4534 User manual

User Guide Please read the Important Notice and Warnings at the end of this document 002-34123 Rev. **
www.infineon.com page 1 of 26 2021-10-21
CY4534 EZ-PD™ barrel connector replacement-
plus (BCR-PLUS) evaluation kit guide
About this document
Scope and purpose
The CY4534 EZ-PD™ barrel connector replacement plus (BCR-PLUS) evaluation kit (EVK) is based on the
CYPD3176 device which is part of the BCR product family of Infineon’s USB Type-C and power delivery
controllers. This document serves as the user guide for this CY4534 EZ-PD™BCR-PLUS EVK.
Intended audience
This EVK is primarily intended for Infineon’s USB Type-C customers who want an evaluation platform to replace
an existing barrel/power input connector with a USB-C connector.
Abbreviations and definitions
Table 1 Abbreviations
Abbreviation
Definition
AFC
adaptive fast charging
BC
battery charging
BCR
barrel connector replacement
CC
configuration channel
CCG
cable controller generation
DFP
downstream facing port
DNP
do not populate
EC
embedded controller
EMCA
electronically marked cable assembly
ESD
electrostatic discharge
EVK
evaluation kit
FET
field-effect transistor
GPIO
general-purpose input/ output
HPI
host processor interface
IC
integrated circuit
I2C
inter-integrated circuit
LED
light-emitting diode
NA
not applicable
OVP
over voltage protection
PA
power adapter
PD
power delivery
PDO
power data object
PFET
P-channel field effect transistor

User Guide 2 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
About this document
Abbreviation
Definition
PSoC™
programmable system-on-chip
QC®
Qualcomm quick charge
SDK
software development kit
SoC
system-on-chip
UFP
upstream facing port
USB
universal serial bus
USB-PD
universal serial bus power delivery
UVP
under voltage protection

User Guide 3 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Safety information
Safety information
This kit is intended for use as an evaluation platform for hardware or software in a laboratory environment. The
board is an open-system design, which does not include a shielded enclosure. Due to this reason, the board
may cause interference to other electrical or electronic devices in close proximity. In such cases, take adequate
preventive measures. Also, do not use this board near any medical equipment or RF devices.
Attaching additional wiring to this product or modifying the product operation from the factory default may
affect its performance and cause interference with other apparatus in the immediate vicinity. If such
interference is detected, suitable mitigating measures must be taken.
This board contains ESD-sensitive devices. Electrostatic charges readily accumulate on
the human body and any equipment, which can cause a discharge without detection.
Permanent damage may occur to devices subjected to high-energy discharges. Proper
ESD precautions are recommended to avoid performance degradation or loss of
functionality. Store unused boards in the protective shipping package.
End-of-life/product recycling
The end-of-life cycle for this kit is five years from the date of manufacture mentioned on
the back of the box. Contact the nearest recycler to discard the kit.
General safety instructions
ESD protection
ESD can damage boards and associated components. Infineon recommends that the user perform procedures
only at an ESD workstation. If an ESD workstation is not available, use appropriate ESD protection by wearing
an antistatic wrist strap attached to the chassis ground (any unpainted metal surface) on the board when
handling parts.
Handling the boards
The board provided with this kit is sensitive to ESD. Hold the board only by the edges. After removing the board
from the box/casing, place it on a grounded, static-free surface. Use a conductive foam pad, if available. Do not
slide the board over any surface.
Do’s and Don’ts
Maximum current that can be consumed by an external load connected to the EVK
board cannot exceed 5 A.

User Guide 4 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Table of contents
Table of contents
About this document....................................................................................................................... 1
Safety information ......................................................................................................................... 3
Table of contents............................................................................................................................ 4
1Introduction .......................................................................................................................... 5
1.1 Kit contents .............................................................................................................................................5
1.2 Hardware not included with the kit........................................................................................................5
1.3 Getting started.........................................................................................................................................5
2Hardware .............................................................................................................................. 6
2.1 Board details ...........................................................................................................................................6
2.2 BCR system overview ..............................................................................................................................7
2.3 Block diagram and functional description.............................................................................................9
2.3.1 EZ-PD™ BCR-PLUS controller features............................................................................................10
2.3.2 DC power transfer system................................................................................................................10
2.3.3 VBUS voltage and current selectors................................................................................................11
2.3.4 Fault LED and VBUS-powered LED ..................................................................................................13
2.3.5 Alternate power source selection jumper.......................................................................................13
2.3.6 External host processor interface (HPI) connection header ..........................................................14
2.3.7 Legacy charging mode selection jumper ........................................................................................14
2.4 Changing the VBUS voltage and current requested from the power adapter....................................15
3Kit operation ........................................................................................................................16
3.1 External hardware required for demos ................................................................................................16
3.2 Running the demos ...............................................................................................................................16
3.2.1 Demo #1: Test with a multimeter and the EZ-PD™ protocol analyzer ...........................................16
3.2.2 Demo #2: Change the sink capabilities from the EZ-PD™ configuration utility.............................17
3.2.3 Demo #3: Test with legacy charging mode feature.........................................................................22
3.3 EVK behavior under mismatched capabilities .....................................................................................23
4Terminology.........................................................................................................................24
Revision history.............................................................................................................................25

User Guide 5 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Introduction
1Introduction
The CY4534 EZ-PD™ barrel connector replacement plus (BCR-PLUS) evaluation kit (EVK) is based on the
CYPD3176 device which is part of the BCR product family of Infineon’s USB Type-C and power delivery
controllers. This EVK is intended to be an evaluation vehicle for customers who want to replace an existing
barrel/power input connector with a USB-C connector. Implementing this solution in an end-product allows the
system to be powered by any USB-C compliant power adapter.
A device, such as a speaker, shaver, power tool, modem, etc. that use a barrel connector for power will benefit
from using a universal power interface such as USB Type-C. To make the transition easier, the CY4534 EZ-PD™
BCR-PLUS EVK provides a USB Type-C receptacle to consume power from a charger and then supply it over a
terminal block. A barrel connector can be attached to this block by using wires to convert a barrel input to USB
Type-C.
The CY4534 EZ-PD™ BCR-PLUS EVK ships with pre-programmed firmware with functionality as documented in
the CYPD3176 device datasheet. As an additional option, customers who prefer further customization of the
BCR-PLUS firmware solution can make changes to the configuration parameters using the EZ-PD™
configuration utility to fit the needs of their end-application.
1.1 Kit contents
•CY4534 EZ-PD™ BCR-PLUS EVK board
•Quick start guide
1.2 Hardware not included with the kit
The EVK does not come with all the hardware required to perform the demonstrations mentioned in Kit
operation. The following items are not included:
•A USB Type-C power adapter that can supply power over the Type-C port
•A two-wire cable with a barrel plug to supply power to an existing device
•A device that accepts power from a barrel connector input
•USB-C cable (if not already provided with the USB-C power adapter) for connecting the USB Type-C power
adapter to the Type-C receptacle on the EVK
•Multimeter and other measurement equipment
•A 3-mm flat-head screw driver (for turning the SW1 rotary switch knob)
•CY4500 EZ-PD™ protocol analyzer
1.3 Getting started
For instructions on how to run a quick demonstration and observe the kit functionality, see the Kit operation
chapter.

User Guide 6 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
2Hardware
This chapter covers the hardware details of the CY4534 EZ-PD™ BCR-PLUS EVK board, a complete system
overview, and description of the critical circuit blocks of the EVK board schematic. For more details, refer to the
schematics of the CY4534 BCR-PLUS EVK board on the kit webpage.
2.1 Board details
Figure 1 below shows the pictures of the front and back of the board with critical components highlighted.
Figure 1 Board (front and back) details
Table 2 lists the major components of the EVK. A detailed bill-of-materials list is available in the design files on
the kit webpage.
Table 2 A brief list of components in the CY4534 EZ-PD™ BCR-PLUS EVK
REFDES
Component
Description
U3
EZ-PD™ BCR-PLUS controller
Barrel connector replacement controller plus i.e. CYPD3176-
24LQXQ device (referred to as “BCR-PLUS” through this
document). This part manages the USB Type-C port and
controls the load switch (PFET).
U2
USB-I2C bridge controller
Infineon’s USB-serial part (CY7C65211-24LTXI) is connected to
the USB micro-B connector (J1) of the EVK. This part works as a
USB-I2C bridge for downloading firmware and configuring the
BCR-PLUS device using the EZ-PD™configuration utility
SW1
Rotary switch
A single-pole 5-throw switch. Set this switch to different
positions to change the maximum voltage negotiated on VBUS.
See VBUS voltage and current selectors for details.
J1
USB Micro-B connector
A USB micro-B connector connects to the PC host for
downloading the firmware or configuring the device.

User Guide 7 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
REFDES
Component
Description
J2
“DC_OUT” terminal block
Terminal block to measure the output voltage of the EVK or to
connect any external electronic load.
J3
Type-C connector
A power-only USB Type-C connector with D+/D-.
J5
Alternate power selection
jumper
Power selection jumper to select the alternate power to supply
the BCR-PLUS device. See Alternate power source selection
jumper for details.
J6
Legacy charging mode
selection header
A header to enable or disable the legacy charging protocol
support feature. See Legacy charging mode selection jumper
for details.
J7
Debug header
5-pin debug header for internal use
J8, J9
External HPI connection
header
Headers to route the external HPI (HPI_SDA, HPI_SCL)
connection to the BCR-PLUS device. See External host
processor interface (HPI) connection header for details.
LED1
VBUS-powered LED
Power LED indicating system state
LED2
Fault LED
LED indicating system faults. See Fault LED and VBUS-
powered LED for details.
Q1
PFET as a main 5 A load
switch
A back-to-back PMOSFET used as a 5-A load switch that
isolates the system power from VBUS. See DC power transfer
system for details.
Q2
PFET as a safe 5 V 1 A load
switch
A back-to-back PMOSFET used as a safe 5-V 1A load switch,
enabled when the PD contract defaults to 5 V due to
mismatching capabilities. See section EVK behavior under
mismatched capabilities for details.
R16, R18
VBUS_MAX resistor selector
Resistor dividers that set the maximum and minimum voltages
that the BCR-PLUS device will negotiate with the USB Type-C
charger. See VBUS voltage and current selectors for details.
R13, R14
VBUS_MIN resistor selector
R17, R19
ISNK_COARSE resistor
selector
Resistor dividers that set the coarse and fine settings for
minimum current that the BCR-PLUS device will negotiate with
the USB Type-C charger. See VBUS voltage and current
selectors for details.
R20, R24
ISNK_FINE resistor selector
2.2 BCR system overview
All DC-powered electronic devices need a power source to operate normally or to charge their battery. Such
devices often have a barrel receptacle connector and a corresponding DC barrel power adapter to supply
power.
Figure 2 is an example of one such combination.

User Guide 8 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
DEVICE BARREL
ADAPTER AC SOCKET
Figure 2 Typical electronic device and its DC barrel power adapter
Such electronic devices usually require a specific voltage and current output from the power adapter. To satisfy
this, the DC barrel adapter’s plug is often custom-made for a device.
USB was the first connector to introduce a standard method of supplying 7.5-W power at 5 V to electronic
devices. A device with a USB micro-B connector can use a standard USB charger that can also be used with
other devices with micro-B ports.
USB Type-C extends this approach for devices that consume up to 100 W of power.
The EZ-PD™BCR-PLUS controller device makes the transition from DC barrel connector to USB Type-C
connector easier by offering a plug-and-play approach to power input design.
DEVICE
USB-C CABLE
USB-C
CHARGER AC SOCKET
Figure 3 Newer electronic devices powered by USB Type-C power adapters
The CY4534 EZ-PD™ BCR-PLUS EVK has a USB Type-C connector (J3) on one end to negotiate power with Type-
C power adapters. It has a terminal block (J2) to which any cable with a DC barrel plug can be connected. The
EVK is therefore a converter between a USB Type-C connector and a DC Barrel plug.

User Guide 9 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
DEVICE
USB-C CABLE
USB-C
CHARGER
CY4534
AC SOCKET
Figure 4 Using the CY4534 EZ-PD™ BCR-PLUS EVK to convert USB Type-C power adapter to legacy
barrel adapter
2.3 Block diagram and functional description
Figure 5 shows the block diagram of the CY4534 EZ-PD™ BCR-PLUS EVK board.
Figure 5 CY4534 EZ-PD™ BCR-PLUS EVK board block diagram
The EZ-PD™ BCR-PLUS controller is a new device in the USB Type-C family for barrel connector replacement
(BCR) applications. This device combines a certified USB Type-C rev 1.2 and power delivery rev 3.0 subsystem,
high-voltage analog for protection, sink-side overcurrent protection and monitoring, legacy charging support
(for BC 1.2, QC2.0, AFC, and Apple Charging), and a load switch controller in an easy-to-use package.

User Guide 10 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
The EZ-PD™ BCR-PLUS controller supports an I2C bootloader for downloading firmware or updating the
configuration parameters of the configuration table using the EZ-PD™ configuration utility.
The CY4534 EZ-PD™ BCR-PLUS EVK features an on-board BCR-PLUS controller which communicates with a USB
Type-C power adapter to negotiate for the proper voltage and current, as specified by on-board resistors. The
DP and DM lines from the BCR-PLUS controller are connected to the Type-C connector for legacy charging
protocol support.
The EVK has a green LED (LED1) to indicate the availability of VBUS and a red LED (LED2) to indicate a fault with
the expected output.
2.3.1 EZ-PD™ BCR-PLUS controller features
•Fixed-function USB Type-C and power delivery controller supporting USB-PD Rev 3 and Type-C Rev 1.2
•Integrated precision Rd and dead-battery Rd termination resistors
•Integrated regulator to power from VBUS
•Supports a high-voltage P-MOSFET gate driver with slew-rate control
•Supports on-chip OVP and UVP to protect system from faults
•Supports legacy charging protocol (BC1.2, QC2.0, AFC and Apple Charging).
•System-level ESD protection on CC, VBUS, DP and DM pins. ± 8-kV contact discharge and ± 15-kV air gap
discharge based on IED61000-4-2 level 4C
•Available in a 24-pin QFN package
For more information, see the BCR-PLUS datasheet.
2.3.2 DC power transfer system
Figure 6 shows the PFET load switch circuitry and the VBUS path of the EVK board.
Figure 6 VBUS Path and P-FET load switch

User Guide 11 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
Power supplied by the USB Type-C power adapter is sent to an external device or load through a set of back-to-
back power PMOSFETs. The PMOSFETs are used for the following functions:
•Reduce the in-rush current due to large capacitive loads. The BCR-PLUS device turns the FETs on slowly to
ensure that the in-rush current is limited and controls the rise time of the DC output voltage. The RC circuit
of R11 and C9 also helps in slowing the FET turn-on time; its values can be modified to change the turn-on
behavior for application-specific needs. Additional fine tuning, if required, can be performed by selecting
slower turn-on options using the EZ-PD™configuration utility.
•When the VBUS input on the USB Type-C connector is out of range, the BCR-PLUS device turns the FETs off
to protect the rest of the system.
•If the attached USB Type-C power adapter cannot supply the voltages required by the system (as indicated
by the resistor divider selectors), the BCR-PLUS device turns the PMOSFET load switch off.
The output of the FETs is connected to terminal block J2. The system to be evaluated can be connected and
powered via this block.
2.3.3 VBUS voltage and current selectors
Figure 7 shows the voltage and current resistor divider networks of the EVK board. The voltage and current
ranges that the BCR-PLUS device will negotiate with the USB Type-C power adapter are determined by this set
of resistor dividers.
Figure 7 Four resistor dividers that select the VBUS voltage and current
The dividers on the VBUS_MIN and VBUS_MAX pins of the BCR-PLUS (R16 and R18 for VBUS_MAX, R14 and R13
for VBUS_MIN) determine the minimum and maximum voltages that BCR-PLUS device will negotiate. By
default, VBUS_MIN is set to 5 V and the 5-position switch is used to determine VBUS_MAX. However, for
customers using the BCR-PLUS device for their end application, the VBUS_MIN and VBUS_MAX voltages can be
finalized using the resistor divider network values as shown in Table 3. To use the resistor divider network on
the kit for VBUS_MAX, SW1 must be at position 5.
For example, if the divider on VBUS_MIN is set to 9 V (i.e., R14 = 5-kΩ pull-up, R13 = 1-kΩ pull-down) and
VBUS_MAX is set to 12 V (R16 = 5-kΩ pull-up, R18 = 2.4-kΩ pull-down), the BCR-PLUS device will request any
voltage between 9 V and 12 V from the power adapter, always preferring the highest voltage. If the power
adapter cannot supply power at 9 V, 12 V, or a value in between, the BCR-PLUS device will turn the load switch
OFF and will assert the FAULT pin.

User Guide 12 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
See Table 3 for a complete list of the available pull-up and pull-down resistor values.
Table 3 Resistor divider values for achieving the desired VBUS_MIN and VBUS_MAX voltages
Voltage on VBUS_MAX or
VBUS_MIN pin of
BCR_PLUS device (V)
Correlated VBUS
voltage(V)
Pull-up resistor value
for R14 or R16 (kΩ)
Pull-down resistor value
for R13 or R18 (kΩ)
V = 3.3 * (0/6)
5
None (DNP)
0
V = 3.3 * (1/6)
9
5
1
V = 3.3 * (2/6)
12
5
2.4
V = 3.3 * (3/6)
15
5
5
V = 3.3 * (4/6)
19
5
10
V = 3.3 * (6/6)
20
0
None (DNP)
Similarly, the resistor dividers on ISNK_COARSE and ISNK_FINE determine the operating current
communicated to the Type-C power adapter (in the request data object; see Section 6.4.2 of the USB-PD
specification rev 3.0 version 1.2). The operating current value (ISNK) is the sum of currents indicated by
ISNK_COARSE and ISNK_FINE. By default, the maximum current is set to 900 mA. See Table 4 and Table 5 for a
complete list of the pull-up and pull-down resistor values for the resistor dividers on ISNK_COARSE and
ISNK_FINE respectively. For scenarios where the operating current value ISNK is greater than 5 A (i.e.,
ISNK_COARSE + ISNK_FINE > 5 A), the BCR-PLUS device will limit the operating current (ISNK) value to 5 A.
Table 4 Resistor divider values for achieving the desired ISNK_COARSE current values
Voltage on
ISNK_COARSE (V)
Pull-up resistor on
ISNK_COARSE (R19)
(kΩ)
Pull-down resistor on
ISNK_COARSE (R17)
(kΩ)
ISNK_COARSE
(A)
V = 3.3 * (0/6)
None (DNP)
0
0
V = 3.3 * (1/6)
5
1
1
V = 3.3 * (2/6)
5
2.4
2
V = 3.3 * (3/6)
5
5
3
V = 3.3 * (4/6)
5
10
4
V = 3.3 * (6/6)
0
None (DNP)
5
Table 5 Resistor divider values for achieving the desired ISNK_FINE current values
Voltage on ISNK_FINE
(V)
Pull-up resistor on
ISNK_FINE (R20) (kΩ)
Pull-down resistor on
ISNK_FINE (R24) (kΩ)
ISNK_FINE (mA)
V = 3.3 * (0/6)
None (DNP)
0
0
V = 3.3 * (1/6)
5
1
250
V = 3.3 * (2/6)
5
2.4
500
V = 3.3 * (3/6)
5
5
750
V > 3.3 * (3/6)
0
None (DNP)
900
See Changing the VBUS voltage and current requested from the power adapter for details on how the BCR-
PLUS uses these pins to select VBUS voltages.

User Guide 13 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
2.3.4 Fault LED and VBUS-powered LED
Figure 8 Red FAULT LED and green VBUS-powered LED
The fault LED will be turned on by driving the FAULT pin HIGH under the following conditions:
•A USB-PD contract could not be negotiated and the VBUS_MIN voltage indicated is not 5 V.
•A USB-PD contract was negotiated but none of the voltages offered are within the VBUS_MIN and VBUS_MAX
ranges.
•Voltages offered by the power adapter is within range but the current offered is below the ILIM limit.
•VBUS voltage supplied by power adapter is outside expected limits.
•The load draws more current than the expected current threshold when Sink OCP is enabled using the EZ-
PD™configuration utility.
•The sink device temperature measured by an external thermistor exceeds the programmed threshold (only
when OTP is enabled using the EZ-PD™ configuration utility).
2.3.5 Alternate power source selection jumper
Figure 9 Alternate power selection jumper circuit
The EVK has a 3-pin jumper (J5) which is designed with a 3-position 100-mil pitch male header. The jumper
header is used for selecting the alternate power supply to power the BCR-PLUS device during the debug
process.
Before using the EVK board for debugging purposes, the alternate power selection jumper (J5) should be
placed at position 2-3. In addition to this, the USB Type-C connector (J3) and USB micro-B connector (J1)
should be left unconnected.

User Guide 14 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
Before using the EZ-PD™ configuration utility for updating the configuration parameters of the BCR-PLUS
device on EVK board, the alternate power selection jumper (J5) should be placed at position 1-2. In addition to
that, the USB Type-C connector (J3) should be left unconnected and the USB Micro-B connector (J1) should be
connected to the PC (which has the EZ-PD™ configuration utility installed) using a USB Micro-B cable.
2.3.6 External host processor interface (HPI) connection header
HPI is a proprietary protocol on top of I2C that exposes the control and status registers of the BCR-PLUS device.
See the EZ-PD™BCR-PLUS/BCR-LITE Host Processor Interface specification for details.
The HPI pins (HPI_SCL and HPI_SDA) of the EVK are exposed on external HPI connection headers (pin 2 of J8,
pin 2 of J9) with an internal 2-kΩ resistor pulled up to V3P3. An external embedded controller (EC) can connect
to these pins directly and communicate to the BCR-PLUS device using the EZ-PD™BCR-PLUS HPI protocol. The
BCR-PLUS appears as an I2C slave with a 7-bit slave address of 0x08.
Figure 10 External HPI connection header circuit
2.3.7 Legacy charging mode selection jumper
The CHARGING_MODE pin of the BCR-PLUS device on the EVK board is connected to the legacy charging mode
selection jumper header (J6). Upon power-up, the BCR-PLUS device will check the status of the
CHARGING_MODE detection pin to determine which legacy charging protocols to support.
•Keep J6 open/unconnected to support all legacy charging protocols. The negotiation sequence will be as
follows:
−Negotiation sequence: (USB-PD →BC1.2 →AFC →QC2.0 (Class B) →Apple →Type-C Only)
•Short J6 to support the BC1.2 legacy charging protocol only.
Figure 11 Legacy charging mode selection jumper circuit

User Guide 15 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Hardware
2.4 Changing the VBUS voltage and current requested from the power
adapter
The BCR-PLUS device executes a capability matching algorithm to select the best voltage and current from the
attached USB Type-C power adapter.
Internally, the BCR-PLUS device maintains a ‘Sink Capabilities’ list based on the VBUS voltage and current
selector pins.
Table 6 Sink capabilities stored inside the BCR-PLUS device
Field in the PDO
Sink capability/PDO #1
Sink capability/PDO #2
PDO (power delivery object) type
Fixed supply
Variable supply
Min voltage
5 V
VBUS_MIN value
Max voltage
5 V
VBUS_MAX value
Current
900 mA
ISNK_COARSE + ISNK_FINE
If the VBUS_MIN value is higher than 5 V, the “Higher Capability” bit is set in the first sink power delivery object
(PDO). This tells the Type-C power adapter that voltages higher than 5 V are needed by the system.
The capability matching algorithm works as follows:
1. Loop through the power adapter’s source PDOs from highest voltage first to find the first PDO that satisfies
the following conditions:
a) Source_PDO_Voltage ≥ VBUS_MIN
b) Source_PDO_Voltage ≤ VBUS_MAX
c) Source_PDO_Maximum _Current ≥ ISNK_COARSE + ISNK_FINE
2. If all three conditions are satisfied, the BCR-PLUS device sends a request for this PDO with operating current
set to ISNK_COARSE + ISNK_FINE.
3. If any condition is not satisfied, the BCR-PLUS device requests 5 V (PDO #1) with 900 mA operating current.
The BCR-PLUS device also sets the ‘CapabilityMismatch’ flag in the request message.
a) Once this mismatch of capabilities is detected, FAULT goes HIGH (3.3 V strong drive) and the “Safe 5V”
load switch (Q3) turns ON.
To modify the VBUS_MAX value, use the rotary switch. To modify the VBUS_MIN, ISNK_COARSE, and ISNK_FINE
values, mount the correct resistor values (see Table 3, Table 4, Table 5) for the resistor divider networks for
each on the bottom of the board.
For details, see the schematics of the CY4534 EZ-PD™ BCR-PLUS EVK board on the kit webpage.

User Guide 16 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Kit operation
3Kit operation
This chapter describes how to configure the CY4534 EZ-PD™ BCR-PLUS EVK to demonstrate the functionality as
a USB Type-C power sink attached to an external device or load.
3.1 External hardware required for demos
•A USB Type-C power adapter or power bank device
−Example power adapters: Apple 30W power adapter, HP 45W laptop AC power adapter
−Example power banks: Anker PowerCore 13000 C, Anker PowerCore III 45W PD Portable Charger
•A USB Type-A power adapter that is capable of handling legacy charging protocol like QC 2.0 (for eg: Anker
60W PIQ 3.0 dual port charger)
•A cable to connect the power adapter or power bank (if not already provided with the USB-C power adapter)
to the Type-C receptacle on the CY4534 EZ-PD™ BCR-PLUS EVK board
•An electronic device that is powered by a DC barrel connector (for Demo #1: Test with a multimeter and
the EZ-PD™ protocol analyzer)
•A DC barrel power adapter for the electronic device (for Demo #1: Test with a multimeter and the EZ-PD™
protocol analyzer)
•A 3-mm flat-head screwdriver
•A wire stripper
•A USB micro-B cable
•A multimeter to measure voltages (for Demo #1: Test with a multimeter and the EZ-PD™ protocol
analyzer)
3.2 Running the demos
3.2.1 Demo #1: Test with a multimeter and the EZ-PD™ protocol analyzer
In this demo, a multimeter is connected to the EVK to test the various voltages offered by the USB Type-C
power adapter (or power bank). You can also connect an electronic load in parallel with the multimeter to test
current capabilities of the power adapter (or power bank) and the EVK.
In addition, you will use the CY4500 EZ-PD™ protocol analyzer to observe and analyze the USB power delivery
packets exchanged between BCR-PLUS device and the USB Type-C power adapter.
V A 
5.10V
V GND
A
BCR-
PLUS
CY4534 BCR-
PLUS EVK
12345
Type-C
USB-C CABLE
TYPE-C POWER
ADAPTER
CY4500
EZ-PD
Analyzer
Connect to a PC
DC_OUT
Figure 12 CY4534 EZ-PD™BCR-PLUS EVK, multimeter, Type-C power adapter and CY4500 protocol
analyzer

User Guide 17 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Kit operation
To set up the demo, perform the following steps:
1. Connect a multimeter to the DC_OUT terminal block (J2) of the CY4534 EZ-PD™BCR-PLUS EVK. If desired,
you may also have a load connected in parallel with the multimeter. See Board details to determine the
polarity of the terminal block or look at the markings on the back of the board.
2. Connect the EVK to the EZ-PD™protocol analyzer’s plug. Connect the EZ-PD™protocol analyzer to your PC
using the USB micro-B cable supplied with it.
3. Ensure that the protocol analyzer software (known as EZ-PD™ analyzer utility) and the necessary drivers are
installed. See the CY4500 EZ-PD™ protocol analyzer kit webpage for details.
4. Open the EZ-PD™ analyzer utility and start a capture.
5. Connect a USB Type-C power adapter to the Type-C receptacle of the protocol analyzer. You will observe
USB power delivery packets captured on the EZ-PD™ analyzer utility.
Each USB Type-C power adapter will advertise a list of voltage and current combinations (called PDOs). The
BCR-PLUS device will select the best PDO based on a set of rules described in the Changing the VBUS voltage
and current requested from the power adapter section.
In short, the VBUS_MAX rotary switch governs the highest voltage that the BCR-PLUS device will request. If that
voltage is unavailable, it looks for the next highest voltage, and so on.
To test this, perform the following steps on the demo setup:
6. Set the VBUS_MAX rotary switch (SW1) to position 1. Verify that the multimeter connected to the DC_OUT
terminal (J2) displays a voltage between 4.5 V and 5.5 V. Detach the power adapter after this observation is
verified. Note that unlike the CYPD3177 EZ-PD™BCR device, the CYPD3176 BCR-PLUS device requires a
power cycle to register the change in VBUS_MIN and VBUS_MAX voltages.
7. Set the VBUS_MAX rotary switch (SW1) to position 2. Re-attach the Type-C power adapter. Verify that the
multimeter displays a voltage between 8.55 V and 9.45 V. If the power adapter does not support this voltage,
you will observe ~5 V.
8. Repeat steps 6 and 7 through all switch positions and observe the output voltage on the multimeter
connected to DC_OUT terminal (J2). If the power adapter supports that voltage, the multimeter reading will
be in the range of VBUS_MAX ± 5%.
3.2.2 Demo #2: Change the sink capabilities from the EZ-PD™ configuration
utility
The configuration parameters in the default firmware running in the BCR-PLUS device contain PDO#1 as a fixed
supply PDO and PDO#2 as a variable supply PDO. This demonstration shows how to change the BCR-PLUS
device’s sink capabilities by using the EZ-PD™ configuration utility to remove the PDO#2 variable supply PDO to
disable the feature to request various voltages from the USB Type-C power adapter. The result is that the kit
will always request 5 V from the fixed supply PDO#1.

User Guide 18 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Kit operation
BCR-
PLUS
CY4534 BCR-PLUS
EVK
12345
Type-C
USB
Micro-B
Connect to a PC
Figure 13 Configuring the BCR-PLUS device on the CY4534 EZ-PD™BCR-PLUS EVK
To set up the demo as shown in Figure 13, perform the following steps:
1. Set jumper J5 to position 1-2 to select the power source from the USB micro-B connector for the EVK board.
2. Install jumpers J8 and J9 to short the external HPI connection header in order to route the HPI signals
HPI_SDA and HPI_SCL to the USB-I2C bridge controller CY7C65211(U2).
3. Connect the EVK’s USB micro-B connector J1 to your PC using a USB micro-B cable.
4. Ensure that the EZ-PD™ configuration utility and the necessary drivers are installed on your PC. See EZ-PD™
configuration utility's web page for details.
5. Launch the EZ-PD™configuration utility as shown in Figure 14. After installation, the configuration utility is
available on the start menu at:
Windows > Start > All Programs > Cypress > EZ-PD™ configuration utility > EZ-PD™ configuration utility
Figure 14 Launch the EZ-PD™ configuration utility on PC
6. Select File > Read from Device to read the existing configuration parameters from the BCR-PLUS device as
shown in Figure 15.

User Guide 19 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Kit operation
Figure 15 Read existing configuration parameters
7. The existing configuration parameters will be displayed. Before proceeding further, save this default
configuration on your PC so that you can reload it once you are done with this demo.
8. In the panel on the left of the EZ-PD™ configuration utility window, select CCGx Configuration > BCR
configuration as shown in Figure 16. In the Power Selection option on the right-side panel, use the
dropdown menu and change the option from “Use BCR pins” to “Use configuration table” as shown in
Figure 16. This option allows the users to override the VBUS_MAX, VBUS_MIN, ISNK_COARSE and ISNK_FINE
values set using the rotary switch SW1 or the resistor dividers and use the sink PDOs set in the configuration
table using the EZ-PD™configuration utility.
Figure 16 Changing the power selection to “Use configuration table”
9. Select CCGx Configuration > PDO > Sink PDO and remove the Sink PDO 1 from the configuration table by
clicking on the Remove button as shown in Figure 17.

User Guide 20 of 26 002-34123 Rev. **
2021-10-21
CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Kit operation
Figure 17 Removing the sink variable PDO#2 from the configuration table
10. Save your project on your PC to a different file than the default configuration that you saved earlier.
11. In the main menu, select Tools > Configure Devices. A new window to configure the device will open as
shown in Figure 18.
12. In this window, under Select Target, select BCR_POWER_SINK. Point to the configuration file (.cyacd file)
saved in the previous step.
13. Click Program. The EZ-PD™configuration utility will load the configuration file on to the BCR-PLUS device
on the EVK board and a message –“Flash updated successfully”will pop up.