100W USB-PD Gallium Nitride (GaN) Fast Charger Solution
LiTong Group presents a high-performance 100W USB-PD (Power Delivery) fast charger solution, leveraging Power Integrations' cutting-edge Gallium Nitride (GaN) technology. This solution is designed to meet the growing demand for compact, highly efficient, and versatile power adapters for laptops, smartphones, and other portable electronic devices.
By integrating Power Integrations' innovative InnoSwitch™ ICs with PowiGaN™ technology, this charger achieves exceptional power density and efficiency, significantly reducing the size and weight of the adapter while maintaining superior thermal performance. It fully complies with the latest USB-PD 3.0 specifications, offering multiple voltage and current profiles for universal compatibility and rapid charging.
Power Architecture Diagram
Figure 1: Simplified block diagram of the 100W USB-PD GaN Fast Charger Solution.
The architecture features a primary-side InnoSwitch IC with integrated PowiGaN switch, coupled with a secondary-side synchronous rectification controller. This combination ensures high efficiency across the entire load range and robust protection against various fault conditions.
Key IC Advantages
- **PowiGaN Technology:** Power Integrations' proprietary GaN switches enable higher switching frequencies and lower switching losses, leading to superior efficiency and power density.
- **InnoSwitch™ Integration:** Combines primary, secondary, and feedback circuits into a single IC, simplifying design and reducing component count.
- **FluxLink™ Communication:** Provides a reliable and accurate feedback path without an optocoupler, enhancing reliability and enabling ultra-fast transient response.
- **Comprehensive Protection:** Integrated features like over-voltage, under-voltage, over-current, and over-temperature protection ensure robust and safe operation.
- **USB-PD 3.0 Compliance:** Supports Programmable Power Supply (PPS) and other advanced USB-PD features for optimized charging.
Recommended Bill of Materials (BOM List)
- **Primary-Side Controller:** Power Integrations INN3870C-H101 (InnoSwitch3-Pro with PowiGaN)
- **Secondary-Side Synchronous Rectification:** Power Integrations SRK1000C (or similar)
- **USB-PD Controller:** [Third-party USB-PD controller, e.g., Cypress CCG3PA]
- **Output Capacitors:** [Specific type and rating]
- **Input Capacitors:** [Specific type and rating]
- **Transformer:** [Custom design based on PI Expert]
Note: The above BOM is illustrative. Actual component selection may vary based on specific design requirements and regional certifications. Our FAE team can assist with detailed BOM optimization.
Application Scenarios
- High-power laptop chargers (e.g., 100W, 65W)
- Multi-port USB-PD chargers
- Fast chargers for smartphones and tablets
- Universal travel adapters