**Abstract:**
This article provides a comprehensive overview of the P9038, highlighting its key features, functional block diagram, and typical application circuits. It focuses on the high-integration IDT wireless charging solution, the IDT wireless charging system, and the demo version of the IDTP9038 transmitter. The content is designed to help engineers and designers understand how the P9038 can be effectively used in various wireless power applications.
**Introduction to P9038**
The P9038 is a WPC-compliant wireless power transmitter designed to operate with A5 and A11 coils, following the WPC specification 1.2.2. It is powered from a 5V supply and operates in a WPC-compatible mode. The device includes an integrated full-bridge inverter that supports 8W power transmission using the P902x receiver family. It also ensures that EMIRFI emissions meet the requirements set by the WPC standard, making it suitable for use in consumer electronics and industrial applications.
The P9038 offers robust protection mechanisms under fault conditions, including resistor-programmable foreign object detection, overcurrent protection, overtemperature protection, and programmable overvoltage protection. Its design simplifies implementation, requiring only a minimal number of external components, which reduces board space and lowers overall system cost compared to alternative solutions.
**Key Features of P9038**
- Input voltage range: 4.5V to 6.9V
- Supports USB or AC adapter input
- Detects USB Dedicated Charger Port (DCP)
- Compatible with WPC 1.2.2, A5 or A11 coils
- Integrated high-efficiency power stage with low RDS(ON)
- Built-in foreign object detection and current sensing
- Excellent EMI performance without the need for an EMI filter
- Supports 8W power transfer to compatible receivers
- Demodulates and decodes packets from WPC-compliant receivers
- I2C interface for EEPROM access
- Programmable input overvoltage protection
- Programmable soft start functionality
- Current limiting and overheat protection
- Operating temperature range: 40°C to 85°C
- Compact 7 x 7 mm 56-VFQFPN package
**Applications of P9038**
The P9038 is ideal for a wide range of applications, including:
- Furniture with built-in wireless charging capabilities
- PC peripherals such as keyboards and mice
- Durable electronic devices like smart home systems
- Home appliances including wireless charging pads
- Battery-powered electronics such as wearables and portable chargers
**Functional Block Diagram of P9038**
*Figure 1: Functional Block Diagram of P9038*
**Typical Application Circuit of P9038**
*Figure 2: Typical Application Circuit Diagram of P9038*
By integrating advanced features and maintaining compliance with industry standards, the P9038 is a reliable and efficient choice for developers looking to implement wireless charging solutions in their products.
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