SMB 1351 Original Mobile Phone IC

Discover Unmatched Functionality and Performance

The SMB 1351 Original Mobile Phone IC is engineered to deliver optimal functionality and superior performance to meet the demands of modern mobile devices. With its advanced internal architecture, this IC ensures exceptional reliability, making it the perfect choice for manufacturers and repair technicians alike. Designed to support streamlined power management and seamless communication within your mobile system, this component stands out as an essential part of premium device construction. SMB 1351 Original Mobile Phone IC

Precision Engineering for Mobile Excellence

Manufactured with industry-leading practices, the SMB 1351 Original Mobile Phone IC provides outstanding quality and durability. This chip plays a critical role in enhancing device efficiency, prolonging battery life, and managing thermal stability – all while supporting high-speed data processing. Whether you need a reliable part for system repairs or are sourcing components for the assembly of cutting-edge smartphones, this IC delivers unmatched reliability with versatility to meet diverse design needs.

Why Choose the SMB 1351 Original Mobile Phone IC?

Opting for the SMB 1351 guarantees access to a high-performance module capable of adapting to versatile usage scenarios. Tested rigorously for standards compliance and quality assurance, every unit provides consistent, dependable operations for enhanced customer satisfaction. Whether you’re assembling products for the mass market or maintaining mobile systems with precision repairs, this original IC prevents complications associated with counterfeits. Elevate your device’s functionality while maintaining exceptional standards of durability and performance. SMB 1351 Original Mobile Phone IC

The SMB1351 is a high-performance battery management and charging integrated circuit (IC) primarily developed by Qualcomm. It is a staple in the mobile repair industry, frequently found in mid-to-high-end smartphones from manufacturers like Xiaomi (Mi 5, Redmi Note series), Huawei, Samsung, and LG. SMB 1351 Original Mobile Phone IC

It is designed to manage lithium-ion (Li-ion) and lithium-polymer (Li-Po) battery charging cycles with high precision, supporting fast-charging protocols while maintaining thermal safety. SMB 1351 Original Mobile Phone IC

Technical Specifications Table

Category	Parameter	Specification Detail
Basic Info	Manufacturer	Qualcomm (OEM)
	Part Number	SMB1351 (Variants: 005, 013, 022)
	Function	Battery Charging & Power Management (PMIC)
Electrical	Input Voltage ( $V_{IN}$ )	3.5V to 5.5V (Standard); Up to 6.5V Max
	Output Voltage ( $V_{BAT}$ )	4.2V / 4.35V / 4.4V (Programmable)
	Charging Current	Adjustable up to 1.5A – 3.0A (Typical)
	Efficiency	Up to 94% Buck Efficiency
Communication	Control Interface	$I^2C$ (Inter-Integrated Circuit)
	Programmability	Fully programmable charging parameters
Protection	Thermal Protection	Thermal Shutdown at $+140\text{°C}$
	Safety Features	Over-voltage, Over-current, Short-circuit
	Battery Safety	NTC Thermistor sensing (TS Pin)
Physical	Package Type	BGA (Ball Grid Array) / WLCSP / QFN
	Pin Count	49-pins (CWLNSP) or 16-pins (QFN variant)
	Operating Temp	$-30\text{°C}$ to $+85\text{°C}$

Key Features and Functionality

The SMB1351 stands out due to its Parallel Charging architecture. In many modern designs, it acts as a secondary “companion” charger to increase the charging speed without concentrating heat in a single area of the motherboard.

Charging Profiles: Utilizes a Constant-Current/Constant-Voltage (CC/CV) charging algorithm. This ensures the battery is charged quickly during the initial phase and safely topped off as it nears capacity.
Automatic Recharge: The IC automatically triggers a recharge cycle if the battery voltage drops below a specific threshold (typically $100\text{mV}$ to $200\text{mV}$ below the termination voltage).
Safety Integration: * TS Pin: Monitors the battery temperature via an external NTC resistor. If the battery becomes too hot or cold, the IC halts charging to prevent chemical instability.
- $I^2C$ Feedback: Real-time data exchange allows the phone’s main processor to monitor battery health, current flow, and voltage levels dynamically.

Common Use Cases & Repair

The SMB1351 is the “go-to” component for fixing common power issues in devices like the Xiaomi Mi 5, Redmi Note 8 Pro, and Huawei P30. Signs of a faulty SMB1351 include:

Stuck Charging: The phone shows a charging icon but the percentage never increases (e.g., stuck at 3%).
Slow Charging: Extremely slow current draw even with a high-wattage adapter.
Dead Phone: A shorted SMB1351 can prevent the device from powering on entirely by grounding the main power rail

SMB 1351 Original Mobile Phone IC