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SGM41528

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

应用领域

I2C Controlled 2A, 2-Cell Battery Charger with Boost Mode for USB Input

产品详情
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.

PIN CONFIGURATIONS

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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


ORDERING INFORMATION
Part NumberStatusPackagePinsPb-FreeTemp Range
SGM41528YG/TRProductionWLCSP-2.1×2.1-25B25Y-40℃ to +85℃