SMB 1399 Mobile Phone IC
Unmatched Performance and Efficiency
Experience the cutting-edge functionality of the SMB 1399 Mobile Phone IC. Designed for seamless integration and optimized performance, this mobile device IC revolutionizes electronic processing while ensuring efficient power management. Perfect for manufacturers looking to enhance smartphone capabilities, SMB 1399 is engineered to meet the diverse needs of modern-day devices with reliability and precision. SMB 1399 Mobile Phone IC
Highly Compatible and Versatile Design
The SMB 1399 Mobile Phone IC is crafted to support a wide range of mobile phone models, enabling manufacturers to streamline production processes without compromising on quality. Whether integrating into high-end smartphones or mid-range devices, this microchip adapts effortlessly to deliver consistent and reliable results, making it an indispensable choice for your product lineup. SMB 1399 Mobile Phone IC
Precision Engineering for Modern Connectivity
This IC stands out for its advanced engineering and robust design that promote superior connectivity and processing speed. With impressive signal handling capabilities, the SMB 1399 Mobile Phone IC ensures that users can enjoy uninterrupted connectivity and smooth operation across various applications. Your mobile devices will benefit from reduced interference, enhanced data transfer rates, and remarkable energy efficiency. SMB 1399 Mobile Phone IC
Incorporate the SMB 1399 Mobile Phone IC into your production to deliver mobile solutions that are future-ready, reliable, and optimized for user satisfaction. Key features include power optimization, multi-functional compatibility, and high-performance signal management. Perfect for manufacturers aiming to stay ahead in a competitive market.
The SMB1399 is a high-performance, premium-tier Power Management Integrated Circuit (PMIC) developed by Qualcomm. It is primarily used as a secondary “slave” charger or a “charge pump” in advanced smartphones to enable ultra-fast charging speeds (such as Qualcomm Quick Charge 5). SMB 1399 Mobile Phone IC
By utilizing a “divide-by-two” charge pump architecture, the SMB1399 allows for massive current delivery (up to 5A or more) while maintaining high efficiency and low heat, which is critical for 100W+ charging systems found in devices like the Xiaomi Mi 10/11 series and RedMagic gaming phones. SMB 1399 Mobile Phone IC
Technical Specifications Table
The following table summarizes the key electrical and physical specifications of the SMB1399 IC based on its application in modern mobile hardware.
| Specification | Details / Value |
| Manufacturer | Qualcomm Technologies, Inc. |
| IC Category | Battery Management / Fast Charging Controller |
| Architecture | Switched Capacitor (Divide-by-Two) Charge Pump |
| Input Voltage Range | 3.6V to 12V (Operating); Up to 28V DC Withstand |
| Maximum Output Current | Up to 5A per IC (Expandable in dual configurations) |
| Charging Efficiency | Up to 97%–98% (Peak) |
| Charging Protocols | Qualcomm Quick Charge 4+/5, USB PD 3.0 PPS |
| Package Type | WLCSP or DFN-10 (depending on variant) |
| Footprint / Size | Approx. 3mm x 3mm or 4mm x 4mm |
| Number of Pins | 24-pin or 30-ball (variant specific) |
| Communication Bus | I²C (Inter-Integrated Circuit) |
| Thermal Protection | Integrated Thermal Shutdown and Over-Temperature Protection |
| Key Features | Dual-charging support, Clock sync, Low $R_{DSON}$ FETs |
Key Features and Functional Overview
1. High-Efficiency Charge Pump
The SMB1399 operates as a divide-by-two charge pump. This means if the input voltage is 10V, the output to the battery is approximately 5V, but with double the current. This reduces the heat generated by the resistance in the charging cable and the phone’s internal traces, as higher voltage is more efficient to transmit than high current.
2. Thermal and Safety Management
One of the standout features of the SMB1399 is its ability to communicate with the primary PMIC and the phone’s CPU. It includes:
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Voltage and Current Sensing: Real-time monitoring to prevent overcharging.
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Thermal Mitigation: It can dynamically lower its output if the device temperature exceeds 42°C.
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Safety Handshakes: Uses encrypted protocols to ensure only certified chargers and cables are used at maximum speeds.
3. Dual Charging Implementation
In many flagship devices, two SMB1399 ICs are used in parallel. This “Dual Charging” configuration splits the load across two chips, effectively doubling the charging speed (up to 10A total) without doubling the heat footprint.
Comparison with Related ICs
While the SMB1399 is common in Xiaomi and Huawei devices, it is often compared to its predecessors:
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SMB1390: The earlier version, typically capped at lower currents and used in early 27W–33W fast-charging systems.
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SMB1396: A contemporary of the 1399, often used in systems that require different communication protocols or slightly different pin configurations.
Maintenance and Repair Note
When replacing an SMB1399 during a repair (e.g., for a “no charge” or “slow charge” symptom), technicians must ensure the Variant Code (such as 001-03) matches exactly. Even if the chip fits the pads, different sub-variants may have different firmware layers tuned for specific SoC (System on Chip) requirements.
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