MagSafe Charger Module Integration Guide

Product Overview

The MagSafe Charger Module is a high-performance wireless charging component designed for integration into third-party accessories. It supports efficient power delivery and requires specific electrical and mechanical configurations to ensure optimal performance and safety.

Electrical Requirements

The module can be powered via an internal power supply or an external USB power source. Key electrical specifications include:

• Maximum average current: 2.5 A at 9 V.
• Protection features: Integrated overvoltage (OVP), overcurrent (OCP), overtemperature (OTP), and foreign object detection (FOD).
• Reverse voltage protection: Required between the module power and ground.
• Power modes: Supports both USB/USB-PD mode and a fixed 9 V mode.

Pads and Assignments

The module features five pads for connectivity: PWR, USB D-, USB D+, USB CC, and GND. All pads support up to 20 AWG wires. The housing is grounded internally and must not be directly connected to an external ground to prevent short circuits.

Factory Configuration

The module includes a USB Virtual COM Port (VCP) interface for factory configuration. Manufacturers must configure parameters such as VendorID, ProductID, ProductPlanUID, and SerialNumber. Configuration can be verified using the TempConfig parameter before permanently locking the settings with LockConfig.

Safety and Design Considerations

To ensure safety and compliance, accessories must prevent arcing paths to the module housing. If air gaps exist, they should be covered with non-conductive materials or insulated with polyurethane or parylene coatings. Electromagnetic compatibility (EMC) design is critical, including the use of shielded cables, proper grounding, and common mode chokes to minimize noise.

Testing Procedures

Integration testing is required to ensure the accessory meets performance standards. This includes verifying physical clearance, coplanarity of orientation magnets, and power delivery efficiency using the MagSafe Certification Assistant app. Low battery recovery tests are also required to ensure the device boots within 15 minutes when connected to the charger.