Overview
Description
The P9222-R-EVK wireless power evaluation board demonstrates the features and performance of the P9222-R 5W wireless power receiver in low-power applications such as earbuds and hearing aids charging cases. The P9222-R-EVK can supply up to 5W power. IDT’s P9235A-RB-EVK Evaluation Board or any other Qi-certified transmitter can be used as the power transmitter for P9222-R-EVK evaluation board testing.
The P9222-R-EVK is a high-efficiency, turnkey reference design supported by comprehensive online resources to significantly expedite design-in effort and enable rapid prototyping. A small 30 × 30 mm power receiver coil is used in the design to meet small form factor device requirements.
Using the P9222-R Windows GUI and the P9222-R-EVK customers can quickly customize operating parameters for their application requirements. Operating parameters such as foreign object detection (FOD) thresholds can be configured by either writing to internal SRAM registers via the I2C interface or by loading the user configuration generated by the P9222-R Windows GUI into an external EEPROM. The P9222-R-EVK has an on-board external EEPROM and connectors to plugin USB to I2C dongle.
Features
- WPC1.2.4 Baseline Power Profile (5W) compatible
- Design optimized for low power applications with 30 × 30 mm coil
- Approximately 70mm² solution area
- Schematic and layout files are available online
- Easy configuration of design parameters through I2C interface or an external EEPROM
- Works with P9222-R Windows GUI
- On-board external EEPROM for easy design parameters change
- J12 connector compatible with “USB-FTDI-V2-1”(FTDI) and ARM60 USB to I2C dongles
- 4–layer PCB with 1oz. copper
Applications
Documentation
|
|
|
|
|---|---|---|
| Type | Title | Date |
| Manual - Hardware | PDF 2.90 MB | |
| End Of Life Notice | PDF 824 KB | |
| Engineering | ZIP 247 KB | |
| Engineering | XLSX 17 KB | |
| Engineering | ZIP 189 KB | |
| Schematic | ZIP 75 KB | |
| Schematic | PDF 65 KB | |
| Application Note |
PDF
1.28 MB
AI-generated Summary:
The guide details optimal PCB layout practices for the P9222 wireless power receiver, emphasizing component placement by circuit function to maximize performance within a compact 37mm² area. It prioritizes wide power traces, solid ground planes, and thermal management through vias-in-pad and thermal tabs. Critical components such as VRECT, LDO, BST, resonance, and communication capacitors are placed in a specific order near the IC to minimize noise and heat. The document highlights the importance of minimizing current loop areas, using low ESR capacitors, and maintaining continuous copper planes for heat dissipation. Layer usage recommendations include solid ground planes under the IC and concentrated routing layers to enhance thermal performance and signal integrity.
|
|
| White Paper |
PDF
627 KB
Wireless power transfer uses an air-core transformer with separate transmitter and receiver coils, making accurate performance modeling difficult due to low magnetic coupling and increased losses. This paper addresses simulation challenges and describes methods to approximate circuit behavior. It demonstrates best practices for tuning Qi and PMA inductive resonance circuits to maximize charging efficiency for mobile devices.
|
|
| Application Note |
PDF
301 KB
AI-generated Summary:
The document explains a circuit design that automatically switches between wireless charging and wired charging (via USB or AC adaptors) for portable devices. It ensures seamless power source selection without energy loss or performance degradation. The design uses two P-Channel MOSFETs controlled by the power source and the enable pin of the wireless receiver IC to prevent leakage currents and conflicts between power supplies. Detailed operational scenarios illustrate how the circuit manages transitions between power sources. Proper component selection and timing adjustments optimize efficiency and reliability. The document includes efficiency data and practical guidance for implementation.
|
|
10 items
|
||
Design & Development
Software & Tools
Related Boards & Kits
Boards & Kits
Evaluation Board for P9235A-RB
The P9235A-RB-EVK Evaluation Board demonstrates 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... Read More
Product Options
| Part Number | Status | Stock | Sampleable | Pb (Lead) Free |
|---|---|---|---|---|
| P9222-R-EVK | Obsolete | Out of Stock | N/A | No |
Support
Support Communities
- P9235A-RB EVK Wireless Power Transmitter "Power Limit" status
I am using the P9235A-RB-EVK and the P9222-R-EVK to evaluate a non-standard coil configuration that results in an overall efficiency of 62% after tuning. I have it working pretty well, but when the load increases to where the input power is 4.0W to 4 ...
Oct 1, 2021
Support Communities
