GENERAL DEscriptION
The SGM41528 is a battery charger and system power path management device for 2-cell Li-Ion or Li-polymer batteries. Its low-impedance power path optimizes efficiency, reduces battery charging time, and extends battery life. I2C programming makes it a flexible powering and charger design solution.
The SGM41528 can detect the input source types which include SDP/CDP/DCP and non-standard adapter through the D+/D- pins following USB BC1.2 Specification.
The SGM41528 features a dynamic power management (DPM) to avoid input adapter overloading or to meet the maximum current limit. It keeps the system voltage regulated to its minimum setting in DPM mode by reducing the charge current. The SGM41528 also provides supplement mode to further support system output in case that the charge current decreased to zero and input is still overload. The SGM41528 can provide the maximum power point with an algorithm called input current optimizer to avoid the input source from overloading.
The SGM41528 supports the default mode (standalone) without host control. It automatically detects the battery voltage and starts the charge. A charge cycle automatically terminates when a full charge is detected if the device is not in thermal regulation or DPM mode. The charger automatically initiates a new charging cycle if the battery voltage falls below the recharge threshold.
The SGM41528 supports USB On-The-Go (OTG) operation by supplying default 5.1V on the VBUS with an output current limit up to 2A.
The SGM41528 provides full protections for safety of battery charging and system operation, including battery temperature monitoring, charging safety timer, over-current and over-voltage protections. When any fault occurs, the SGM41528 asserts a nINT pulse to notify the host.
The SGM41528 is available in a Green WLCSP-2.1×2.1-25B package.
FEATURES
3.9V to 6.2V Operating Input Voltage Range
Up to 20V Sustainable Voltage
Fully Integrated All MOSFETs, Current Sense and Compensation
High Efficiency, 2A, 1.5MHz Boost Charger: Up to 92.5% Charge Efficiency with 1A Charge Current for 7.6V Battery Voltage
USB OTG with 4.5V to 5.5V Adjustable Output: Up to 2A Output, up to 94.5% Efficiency at 5.1V/1A Output
Selectable PFM Mode and Out-of-Audio (OOA) Mode at Light Load Operations
Narrow Voltage DC (NVDC) Power Path Management
I2C Port for Flexible System Parameter Setting and Status Reporting
Integrated ADC for Monitoring Input Voltage, Input Current, Battery Voltage, Charge Current, System Voltage, Battery Temperature and Die Temperature
High Battery Discharge Efficiency with 13mΩ Switch
USB BC1.2 and Non-Standard Input Source Adaptors Auto Detection
Input Current Optimizer (ICO) to Maximize Adaptor Output Current without Overloading
Programmable Input Current Limit (IINDPM) and Dynamic Power Management to Support USB Standard Adapters
Maximum Power Tracking by Programmable Input Voltage Limit (VINDPM)
Safety Features Including Configurable JEITA for Battery Temperature Protection
Battery Charging Safety Timer
Thermal Regulation and Thermal Shutdown
Watchdog Monitoring I2C Operation
VBUS/System/Battery Over-Voltage Protection
Output Over-Current Protection for Both Boost and OTG Buck Mode
APPLICATIONS
Smart Phones, EPOS
Portable Internet Devices and Accessory