SMB 1355 Mobile Phone IC
Unmatched Efficiency and Performance
The SMB 1355 Mobile Phone IC offers an exceptional combination of efficiency and performance to meet the demands of modern mobile devices. Designed for seamless integration into smart devices, this high-quality integrated circuit (IC) ensures smooth operations while supporting advanced features. If you’re looking for a product that combines innovation with reliability, the SMB 1355 IC is the perfect choice. SMB 1355 Mobile Phone IC
Optimized for Cutting-Edge Technology
This mobile IC is engineered to enhance power management, reduce energy consumption, and extend the battery life of your device without compromising performance. Built with robust architecture, the SMB 1355 supports multiple functionalities, making it ideal for manufacturers looking to deliver excellence in their mobile technology. From enhanced processing to fault tolerance, this IC ensures your device operates at peak performance every time. SMB 1355 Mobile Phone IC
Precision and Reliability You Can Trust
Crafted with a focus on precision engineering, the SMB 1355 Mobile Phone IC is a reliable choice for ensuring stable and secure device operation. Manufactured using top-grade materials, it is tailored to endure demanding conditions while minimizing wear and tear. Its compatibility with various devices and platforms makes it an adaptable component for mobile phone manufacturing. By choosing the SMB 1355 IC, you are investing in a product designed with durability and longevity in mind, perfect for supporting high-tech workloads. SMB 1355 Mobile Phone IC
The SMB 1355 Mobile Phone IC emphasizes performance, reliability, and energy efficiency, making it a powerful solution for meeting diverse mobile device requirements. Whether you’re a developer integrating ICs on high-end smartphones or a manufacturer aiming for dependable technology, this component is built to exceed expectations.
The SMB1355 is a high-performance, programmable parallel battery charging Integrated Circuit (IC) developed by Qualcomm. It is primarily used in high-end mobile devices (like the Xiaomi Mi 8, Mix 3, and LG G5) to support fast-charging standards, specifically designed to work alongside a primary Power Management IC (PMIC) to distribute heat and increase charging speed. SMB 1355 Mobile Phone IC
Technical Overview
The SMB1355 functions as a secondary (parallel) charger. In modern smartphones, charging at high currents (e.g., 3A to 5A) can cause significant heat if handled by a single chip. The SMB1355 shares this load, allowing the device to charge faster while keeping the “skin temperature” of the phone low. It utilizes a high-efficiency buck regulator architecture to convert high input voltages from Quick Charge adapters into the lower voltage required by the Lithium-Ion battery. SMB 1355 Mobile Phone IC
SMB1355 Full Specifications
| Feature | Specification Detail |
| Manufacturer | Qualcomm (formerly Summit Microelectronics) |
| Function | Parallel Switching Mode Battery Charger |
| Input Voltage (Operating) | 3.6 V to 14.2 V |
| Withstand Voltage | Up to 28 V (Protection against surges) |
| Maximum Charge Current | Up to 5.0 A (Programmable) |
| Efficiency | Up to 94% at 3 A battery current |
| Communication Interface | I²C (Digital programmability of all parameters) |
| Charging Technology | Quick Charge 2.0, 3.0, and 4.0/4+ Compatible |
| Package Type | 36-pin Wafer-Level NanoScale Package (WLNSP) |
| Package Dimensions | 2.62 mm × 2.62 mm × 0.55 mm |
| Switching Frequency | ~1.2 MHz to 3.0 MHz (Internal oscillator) |
| Protection Features | Over-voltage (OVP), Thermal Shutdown, Battery Temp Monitoring |
Key Features and Capabilities
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Parallel Charging Topology: By pairing with a primary charger (like the PM845 or SMB1351), it enables high-current charging without concentrated heat spots on the motherboard.
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Programmability: Almost every parameter, including input current limit, battery charge voltage, and termination current, can be adjusted via the I²C bus. This allows manufacturers to fine-tune charging profiles for different battery capacities.
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Thermal Management: It includes integrated thermal sensors that can throttle charging current if the IC or the battery reaches a specific temperature threshold (typically around 150°C for shutdown).
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Safety Guards: The 28V “hold-off” voltage is critical for modern USB-C PD (Power Delivery) and High Voltage Direct Charge (HVDCP) systems, ensuring the chip isn’t fried if a faulty or high-voltage adapter is connected.
Common Use Cases
You will typically find the SMB1355 in Snapdragon-based flagship or mid-range devices from 2018–2020. If a phone is stuck at a “slow charging” rate or fails to recognize a fast charger despite the adapter being functional, this IC is often the primary suspect for repair technicians.
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