SGM41578
I2C Controlled Single-Cell 2.5A Buck-Boost Charger with Power Path Management
The SGM41578 is a 2.5A synchronous Buck-Boost charger with NVDC power path management. It can provide high efficient and low component count solution for single-cell battery charging applications.
The SGM41578 charges the single-cell Li-Ion or Li-polymer battery over a 2.6V to 5.5V input range, ensuring a seamless transition between modes by automatically switching Buck, Buck-Boost and Boost modes. The key charge parameters can be programmed via the I2C interface for optimal system performance. If the device is not in thermal regulation mode, the charge cycle automatically terminates when a full charge is detected. The charger automatically initiates a new charge cycle if the battery voltage falls below the recharge threshold. The SGM41578 also provides comprehensive protection for safety of battery charging and system operation, including battery temperature monitoring, charging safety timer, over-current and over-voltage protections.
The SGM41578 is available in a Green WLCSP -1.79×1.79-16B package.
- High Efficient Synchronous Buck-Boost Charger
- Automatic and Seamless Transition between Buck, Buck-Boost and Boost Operations
- 1MHz or 2MHz Switching Frequencies Setting
- Programmable VINDPM
- Up to 95% Total Efficiency
95% when VVBUS = 4.2V, VBAT = 3.6V, ICHRG = 1A
92.5% when VVBUS = 4.2V, VBAT = 3.6V, ICHRG = 2A - NVDC Power Path Management with 19mΩ BATFET
- 2.6V to 5.5V Input Voltage Range
- High Accuracy Voltage/Current Regulation
- Built-In Current Sensing and Limiting
- 0.7μA Quiescent Current in Shipping Mode
- Comprehensive Integrated Protection Features
- VBUS/System/Battery Over-Voltage Protection
- Over-Current Protection for Both Charge and Discharge Mode
- Battery Charging Safety Timer
- Thermal Regulation and Thermal Shutdown
- Configurable JEITA for Battery Temperature Protection
- Available in a Green WLCSP-1.79×1.79-16B Package
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