SGM41575

The SGM41575 is an integrated 4 switching MOSFETs Buck-Boost battery charger and system power path management device for 1-4 cells 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 SGM41575 can detect the input source types which include SDP/CDP/DCP and non-standard adaptor through the D+/D- pins following USB BC1.2 specification. It provides D+/D- handshake to support fast charging with the adjustable high voltage adaptor (HVDCP). The wide full input voltage range and the input current range can also support USB-PD applications.

To support 1-4 cells Li-Ion battery charging, the SGM41575 automatically works at Buck, Boost or Buck-Boost configurations according to the adaptor voltage and the battery voltage. The SGM41575 supports two different input sources with its dual input source selector management. 

The SGM41575 employs narrow VDC architecture (NVDC) with BATFET separating system from the battery. Even without battery or with a fully depleted battery, the system is regulated to above the minimum system voltage. The SGM41575 features a dynamic power management (DPM) to avoid input adaptor 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 SGM41575 also provides supplement mode to further support system output in case that charge current decreased to zero and the input is still overload. The SGM41575 can provide the maximum power point with an algorithm called input current optimizer (ICO) to avoid the input source overload.

The SGM41575 supports the default mode (standalone) without the host control. It automatically detects the battery voltage and starts charging. 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 battery voltage falls below the recharge threshold. 

The SGM41575 supports USB On-The-Go (OTG) operation by supplying default 5V on the VBUS with an output current limit up to 3.32A. To support the programmable power supply (PPS) feature defined by the USB-PD 3.0 Specifications, the OTG voltage is programmable from 2.8V to 22V with 10mV resolution. 

To save the power from battery to system, the SGM41575 provides an SDRV pin to control an external N-channel ship FET. Host can set charger to ship mode or shutdown mode to reduce the leakage current from battery by I²C.

The SGM41575 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 SGM41575 asserts an nINT pulse to notify the host. 

The SGM41575 provides the integrated 16-bit ADC for monitoring input voltage, input current, battery voltage, charge current, system voltage, battery temperature and die temperature. 

The SGM41575 is available in a Green WLCSP- 2.97×3.37-56B package.