SGM41512.pdf
No.10656
? High Efficiency, 1.5MHz, Synchronous Buck Charger
? USB On-The-Go (OTG) Support (Boost Mode)
Boost Converter with up to 1.2A Output
Boost Efficiency of 93.5% at 0.5A and 92.2% at 1A
? Single Input for USB or High Voltage Adapters
? High Battery Discharge Efficiency with 28mΩ Switch
? Narrow Voltage DC (NVDC) Power Path Management
? Ship Mode, Wake-Up and Full System Reset Capability by
Battery FET Control
? Flexible Autonomous and I2C Operation Modes for Optimal
System Performance
? Fully Integrated Switches, Current Sense and Compensation
? 10μA Ship Mode Low Battery Leakage Current
? High Accuracy
±0.5% Charge Voltage Regulation
±5% Charge Current Regulation at 1.5A
±10% Input Current Regulation at 0.9A
The SGM41512 is a battery charger and system power path management device with integrated converter and power switches for use with single-cell Li-Ion or Li-polymer batteries. This highly integrated 3A device is capable of fast charging and supports a wide input voltage range suitable for smart phones, tablets and portable systems. I2C programming makes it a very flexible powering and charger design solution.
The device includes four main power switches: input reverse blocking FET (RBFET, Q1), high-side switching FET for buck or boost mode (HSFET, Q2), low-side switching FET for buck or boost mode switching (LSFET, Q3) and battery FET that controls the interconnection of the system and battery (BATFET, Q4). The bootstrap diode for the high-side gate driving is also integrated. The internal power path has a very low impedance that reduces the charging time and maximizes the battery discharge efficiency. Moreover, the input voltage and current regulations provide maximum charging power delivery to the battery with various types of input sources.
