IW1791-02

Power Supply Controllers, Monitors Overview

The iW1791-02 is a 27W output, high-performance AC/DC RapidCharge power supply controller designed for travel adapter applications. It supports USB Power Delivery 3.0, Qualcomm Quick Charge 3.0 and 2.0, and Direct Charge protocols. The device utilizes primary-side regulation with peak current mode DCM control to reduce BOM cost by integrating high-voltage components. It operates at a switching frequency of 76 kHz and features advanced protections including OVP, OTP, IUVP, PCL/OCP, and SRSC. Optimized for companion use with the iW657P USB PD controller, it ensures smooth voltage transitions via optocoupler communication.

Power Supply Controllers, Monitors Feature Summary

• Supports multiple rapid charging protocols including USB PD 3.0 and Qualcomm Quick Charge
• Integrates high-voltage components to minimize bill of materials in travel adapters
• Features primary-side regulation with peak current mode DCM control
• Includes comprehensive protection mechanisms such as overvoltage and overtemperature protection

Power Supply Controllers, Monitors Applications

• Mobile device travel adapters requiring fast charging capabilities
• USB Power Delivery compliant power supplies
• Qualcomm Quick Charge compatible wall chargers
• Direct charge adapter designs

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix (e.g., -02) against official Renesas documentation to ensure correct package type and tape/reel configuration. Confirm that the component meets the required environmental specifications for your target application. Cross-reference the datasheet revision date to ensure compatibility with current design standards. Ensure that the ordering information matches the exact part number variant intended for production.

Power Supply Controllers, Monitors Selection Notes

Select this controller when designing compact AC/DC adapters that require support for modern fast charging standards like USB PD 3.0. It is suitable for applications where reducing component count and board space is critical. Consider pairing it with the iW657P controller for enhanced protocol handling. Evaluate its primary-side regulation benefits against systems requiring secondary-side feedback precision.

Power Supply Controllers, Monitors Part Context

The iW1791 series belongs to Renesas' RapidCharge family of digital controllers aimed at simplifying power adapter designs. These devices are engineered to replace traditional secondary-side regulation schemes, thereby lowering costs and improving power density. The iW1791-02 specifically targets the consumer electronics market, providing a robust solution for mobile charging accessories that need to comply with evolving industry charging standards.

Power Supply Controllers, Monitors Replacement Considerations

Check for direct pin-to-pin replacements within the iW1791 series or newer generations from Renesas. Verify functional equivalence if considering competitors, particularly regarding supported charging protocols and integration with companion controllers. Ensure that any substitute maintains the same protection features and regulatory compliance status.