**Abstract:** This article provides an in-depth overview of the P9038, highlighting its key features, functional block diagram, and a typical application circuit. 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 for A5 and A11 coils, supporting the WPC specification 1.2.2 from a 5V power supply. Operating in WPC-compatible mode, it integrates a full-bridge inverter that enables 8W power transmission using the P902x receiver family. The device ensures compliance with EMIRFI emission requirements, making it suitable for use in a wide range of consumer electronics.
Equipped with comprehensive protection mechanisms, the P9038 includes resistor-programmable foreign object detection, overcurrent protection, overtemperature protection, and programmable overvoltage protection. Its ease of use, minimal external component requirement, and compact design make it an ideal choice for developers looking for a cost-effective and space-efficient wireless charging solution.
**Key Features of P9038**
- Input voltage range: 4.5V to 6.9V
- Supports USB or AC adapter power sources
- Recognizes USB Dedicated Charger Port (DCP)
- Compatible with WPC 1.2.2 standard for 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 external filters
- Enables 8W power transmission to compatible receivers
- Decodes and demodulates packets from WPC-compatible receivers
- I²C interface for EEPROM access
- Programmable input overvoltage protection
- Adjustable soft start functionality
- Current limiting and thermal protection
- Operates within a temperature range of 40°C to 85°C
- Compact 7 x 7 mm 56-VFQFPN package
**Applications of P9038**
- Smart furniture
- PC peripherals
- Durable electronic devices
- Home appliances
- Battery-powered electronic products
**Figure 1. Functional Block Diagram of P9038**
**Figure 2. Typical Application Circuit Diagram of P9038**
By integrating advanced features and ensuring compliance with industry standards, the P9038 offers a reliable and efficient wireless power solution for modern applications. Whether you're designing a smart home device, a portable charger, or a wireless-enabled peripheral, the P9038 provides the flexibility and performance needed to meet today’s demanding requirements.
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