NCP4371AADDR2G

Overview

The NCP4371AADDR2G is a secondary side controller for Qualcomm Quick Charge 3.0 (QC 3.0) High Voltage Dedicated Charging Port (HVDCP) A and B specifications. It enables AC-DC USB adapters to select output voltage based on portable device commands, ranging from 3.6V to 20V. This reduces charging current and IR drop, improving system efficiency. The device integrates voltage and current feedback regulation, eliminating the need for TL431 shunt regulators. It includes safety discharge circuits and soft short-circuit protection down to VBUS=2.2V.

Feature Summary

• Supports Qualcomm Quick Charge 3.0 HVDCP A and B specifications
• Integrates voltage and current feedback regulation without external shunt regulators
• Provides safety discharge circuitry for rapid capacitor discharge upon cable removal
• Includes soft short-circuit protection with current limiting at low VBUS levels

Applications

• AC-DC USB adapter design
• Qualcomm Quick Charge 3.0 compatible power supplies
• Portable device charging systems requiring variable voltage input

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package integrity and pin alignment against official datasheet specifications. Ensure storage conditions comply with moisture sensitivity level requirements prior to assembly. Validate part marking codes match the specific suffix configuration for traceability and quality assurance purposes.

Selection Notes

Select this controller for applications requiring QC 3.0 compliance and integrated regulation. It simplifies design by removing the need for discrete shunt regulators. Consider its voltage range and protection features when designing for high-efficiency charging systems. Ensure compatibility with the target portable device's communication protocol for optimal performance.

Part Context

This component belongs to the NCP4371 family of secondary side controllers designed for fast charging applications. It is specifically engineered to support Qualcomm Quick Charge 3.0 standards, allowing dynamic voltage adjustment between the adapter and the portable device. The family focuses on reducing system cost and complexity by integrating essential control functions directly into the controller IC.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with other QC 3.0 controllers if direct replacement is required. Ensure pinout and electrical characteristics match the original design constraints before substituting.