Renesas P9235A-RB-EVK User manual

P9235A-RB-EVK Evaluation Board User Manual
© 2019 Integrated Device Technology, Inc.
1
February 21, 2019
Description
The P9235A-RB-EVK Mass-Market Evaluation Board demon-
strates the features of the P9235A-RB 5W Wireless Power
Transmitter (TX). It is intended to evaluate the functionality and
performance of the P9235A-RB when combined with a power
receiver in a wireless charging system. The P9235A-RB-EVK
offers the flexibility to select parameters, such as the over-current
limit threshold, LED pattern, and external temperature sensing
function. The printed circuit board (PCB) has four layers.
The P9235A-RB Evaluation Board is designed to function with the
P9225-R Receiver Evaluation Board, which is ordered separately
(see www.idt.com/p9225-r-evk for details). It can also be used with
the user’s WPC-1.2.4 compliant receiver.
The high-efficiency, turnkey reference design is supported by
comprehensive online digital resources to significantly expedite the
design-in effort and enable rapid prototyping. The total active area
is optimized to 21mm x 21mm.
Kit Contents
P9235A-RB-EVK Mass-Market Evaluation Board
Features
P9235A-RB Evaluation Board provides support for WPC-1.2.4
Power capability: 5W for 5V input
Adjustable over-current protection (OCP) threshold
Adjustable temperature shutdown
Two programmable LED status indicators
Supports 5V input voltage
Secured authentication (16-bit private key and 16-bit random
number)
Fully assembled with test points and coil fixture
P9235A-RB-EVK Mass-Market Evaluation Board
P9235A-RB Transmitter Board Connected to P9225-R-EVK
Transmitter Coil P9225-RB-EVK Receiver Board
VOUT and GND Test Points

P9235A-RB-EVK Evaluation Board User Manual
© 2019 Integrated Device Technology, Inc.
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February 21, 2019
Important Notes
Disclaimer
Integrated Device Technology, Inc. and its affiliated companies (herein referred to as “IDT”) shall not be liable for any damages arising out of defects resulting from
(i) delivered hardware or software
(ii) non-observance of instructions contained in this manual and in any other documentation provided to user, or
(iii) misuse, abuse, use under abnormal conditions, or alteration by anyone other than IDT.
TO THE EXTENT PERMITTED BY LAW, IDT HEREBY EXPRESSLY DISCLAIMS AND USER EXPRESSLY WAIVES ANY AND ALL WARRANTIES, WHETHER
EXPRESS, IMPLIED, OR STATUTORY, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR A
PARTICULAR PURPOSE, STATUTORY WARRANTY OF NON-INFRINGEMENT, AND ANY OTHER WARRANTY THAT MAY ARISE BY REASON OF USAGE
OF TRADE, CUSTOM, OR COURSE OF DEALING.
Restrictions in Use
IDT’s P9235A-RB-EVK Mass-Market Evaluation Board and the P92xx 5-15W Wireless Power Pro software are designed for evaluation purposes only. The P9235A-
RB-EVK Mass-Market Evaluation Board and software must not be used for module production or production test setups.
Contents
1. Setup ............................................................................................................................................................................................................4
1.1 Required or Recommended User Equipment......................................................................................................................................4
1.2 User Computer Requirements and Software Installation.....................................................................................................................4
1.2.1Computer Requirements ......................................................................................................................................................4
1.2.2 Software Installation .............................................................................................................................................................4
1.3 Kit Hardware Connections...................................................................................................................................................................5
2. Usage Guide.................................................................................................................................................................................................5
2.1 Overview of the P9235A-RB-EVK .......................................................................................................................................................5
2.2 LED Pattern.........................................................................................................................................................................................7
2.3 OCP and FOD Tuning .........................................................................................................................................................................9
2.4 External Temperature Sensing –TS .................................................................................................................................................10
2.5 Programming Interface ......................................................................................................................................................................11
2.6 Transmitter Coil .................................................................................................................................................................................11
3. P9235A-RB Evaluation Board V1P1 Schematic.........................................................................................................................................12
4. Bill of Materials (BOM)................................................................................................................................................................................13
5. Board Layout ..............................................................................................................................................................................................15
6. Ordering Information...................................................................................................................................................................................18
7. Revision History..........................................................................................................................................................................................18

P9235A-RB-EVK Evaluation Board User Manual
© 2019 Integrated Device Technology, Inc.
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February 21, 2019
List of Figures
Figure 1. Connecting the Dongle ........................................................................................................................................................................4
Figure 2. P9235A-RB V1P1 Evaluation Board Features ....................................................................................................................................5
Figure 3. P9235A-RB Evaluation Board Details .................................................................................................................................................6
Figure 4. R61 and R62 Schematic Location .......................................................................................................................................................8
Figure 5. R61 and R62 PCB Location ................................................................................................................................................................8
Figure 6. R58 and R59 Schematic Location .......................................................................................................................................................9
Figure 7. R58 and R59 PCB Location ................................................................................................................................................................9
Figure 8. RTH1 and R60 Schematic Location ..................................................................................................................................................10
Figure 9. RTH1 and R60 PCB Location............................................................................................................................................................10
Figure 10. Silkscreen –Top of Board .................................................................................................................................................................15
Figure 11. Copper –Top Layer...........................................................................................................................................................................15
Figure 12. Copper L1 Layer................................................................................................................................................................................16
Figure 13. Copper L2 Layer................................................................................................................................................................................16
Figure 14. Copper Bottom ..................................................................................................................................................................................17
List of Tables
Table 1. Selecting the LED Pattern ...................................................................................................................................................................7
Table 2. Recommend Coil Manufacturer.........................................................................................................................................................11
Table 3. P9235A-RB-EVK BOM......................................................................................................................................................................13

P9235A-RB-EVK Evaluation Board User Manual
© 2019 Integrated Device Technology, Inc.
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February 21, 2019
1. Setup
1.1 Required or Recommended User Equipment
The following additional lab equipment is required for using the kit:
P9225-R-EVK Receiver Evaluation Board or any WPC-1.2.4 compliant receiver
5V power supply or 5V/2A AC adaptor USB adaptor provided by the user
IDT Dongle (sold separately)
1.2 User Computer Requirements and Software Installation
1.2.1 Computer Requirements
A Windows®-based computer is required for interfacing with the kit and configuring the part. The user must have administrative rights on the
computer to download and install the software for the P9235A-RB-EVK.
The computer must meet the following requirements:
Windows® 7 or higher version
Internet access
1.2.2 Software Installation
Follow these procedures for the P9225-R/P9235A-RB software installation:
Step 1: Obtain the P92xx 5-15W Wireless Power Pro graphical user interface (GUI) software from IDT (see contact information on the last
page) or the distributor, and install the software according to the P92xx 5-15W Wireless Power Pro GUI User Manual, which is available upon
request from IDT
Step 2: Use the dongle to connect the P9235A-RB-EVK with the user’s computer as shown in Figure 1.
Figure 1. Connecting the Dongle
Dongle
Connect the Dongle to J4
on the P9235A-RB-EVK

P9235A-RB-EVK Evaluation Board User Manual
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1.3 Kit Hardware Connections
Follow these procedures to set up the kit as shown on page 1.
1. Set up the P9235A-RB Evaluation Board by plugging the 5V adapter or the user’s power supply into J11 (Micro-USB connector). Refer to
Figure 2.
2. If using the P9225-R-EVK Evaluation Board as the receiver, connect wires to the VOUT and GND test points on the P9225-R-EVK receiver
to allow measuring the output voltage and applying a load.
3. Place the P9225-R-EVK or the user’s receiver on the transmitter (TX) pad with the components facing up as shown on page 1.
4. Verify that the two green LEDs identified in Figure 2 are illuminated indicating that coupling has been established.
2. Usage Guide
2.1 Overview of the P9235A-RB-EVK
Figure 2. P9235A-RB V1P1 Evaluation Board Features
Micro-USB J11
LED1 and LED2
Pattern Indicators
IDT Programming
Connector J4

P9235A-RB-EVK Evaluation Board User Manual
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Figure 3. P9235A-RB Evaluation Board Details

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2.2 LED Pattern
The P9235A-RB-EVK uses two LEDs (LED1 and LED2 as shown in Figure 2 to indicate the power transfer status, faults, and operating modes.
The LEDs are connected to the LED1 and LED2 pins as shown on the P9235A-RB-EVK schematics (see section 3). The LED patterns can be
selected by setting the voltage on the LED_PAT pin via the resistor divider R61 and R62; see Table 1 for the options. On the P9235A-RB-EVK,
the LED_PAT pin is pulled up to 3.3V through R61. R62 is unpopulated; therefore, option 7 is the default option.
Table 1. Selecting the LED Pattern
Option #
R61
[KΩ]
R62
[KΩ]
LED Status
Description
LED #/Color
Operational Status
Standby
Power Transfer
Complete
Fault
1
Open
10
Dual-LED,
Standby on,
Blink
LED1 –RED
Off
On
Off
Off
10
0.232
LED2 –GREEN
Off
Off
Off
Blink 4Hz
2
10
0.732
Dual-LED,
Standby on,
No Blink
LED1 –RED
Off
On
Off
Off
LED2 –GREEN
Off
Off
Off
Blink 4Hz
3
10
1.27
Single-LED,
Standby on
No Blink
LED1 –RED
Off
Blink 1Hz
On
Blink 4Hz
LED2 –GREEN
Off
Off
Off
Off
4
10
1.87
Single-LED,
Standby on,
No Blink
LED1 –RED
Off
On
Off
Blink 4Hz
LED2 –GREEN
Off
Off
Off
Off
5
10
2.55
Dual-LED,
Standby-Off,
No Blink
LED1 –RED
Off
Blink 1Hz
On
Off
LED2 –GREEN
Off
Off
Off
Blink 4Hz
6
10
3.32
Dual-LED,
Standby-Off,
No Blink
LED1 –RED
Off
Off
On
Off
LED2 –GREEN
Off
On
Off
Blink 4Hz
7
10
4.22
Reserved
LED1 –RED
Off
Blink 1Hz
On
Off
10
Open
LED2 –GREEN
Off
Off
Off
Blink 4Hz
Note: The tolerance of R61 and R62 as shown in Table 1 is ±1%.

P9235A-RB-EVK Evaluation Board User Manual
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Figure 4. R61 and R62 Schematic Location
Figure 5. R61 and R62 PCB Location

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2.3 OCP and FOD Tuning
The over-current protection (OCP) is designed to protect the transmitter from operating conditions that could potentially cause damage or
unexpected behavior from the system. The input current is continuously monitored during the power transfer stage. If the input current goes
above the OCP threshold of the programmed current limit, the P9235A-RB will shut down the TX and restart again. ILIM/FOD_ADJ (pin 15) is
used to turn on/off the FOD function. When ILIM/FOD_ADJ voltage is greater than 2.4V, FOD is enabled, and vice versa. The OCP threshold
is always set to 2400mA. On the P9235A-RB-EVK, the ILIM/FOD_ADJ pin is pulled up to 3.3V through R58. R59 is unpopulated, so the FOD
function is enabled.
Figure 6. R58 and R59 Schematic Location
Figure 7. R58 and R59 PCB Location

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2.4 External Temperature Sensing –TS
The P9235A-RB includes an optional temperature sense input pin, TS, used to monitor a remote temperature, such as for a coil or a battery
charger.
The TS pin voltage can be calculated by Equation 1.
VTS =VLDO33 * NTC
(NTC + R60)
Equation 1
Where
NTC Thermistor’s resistance (TH_COIL1)
R60 Pull-up resistor connected to the 3.3V supply voltage on the P9235A-RB Evaluation Board
The over-temperature shutdown is triggered if the voltage on the TS pin is lower than 0.65V. The RTH1 is not populated on the P9235A-RB
Evaluation Board.
Figure 8. RTH1 and R60 Schematic Location
Figure 9. RTH1 and R60 PCB Location