SG-Micro SGM41518 | Demoboard SGM41518 Demo Board

Description

The SGM41518 is a battery charger and system power path management device with integrated converter and power switches for using with single-cell Li-Ion or Li-polymer batteries. This highly integrated 1.26A device is capable of fast charging and supports a wide input voltage range suitable for wearable and earphone applications. 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 (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.

Features

• High Efficiency, 1.5MHz, Synchronous Buck Charger
• 95% Charge Efficiency at 1A from 5V Input
• Selectable PFM Mode for Light Load Efficiency
• Boost Mode Support
• Boost Efficiency of 95.5% at 0.5A and 95% at 1A
• PMID_GD Pin Control External P-MOSFET for Protection against Fault Conditions
• Selectable PFM Mode for Light Load Operations
• Single Input for USB or High Voltage Adapters
• 3.9V to 13.5V Operating Input Voltage Range-
• 22V Absolute Maximum Input Voltage Rating
• Programmable Input Current Limit and Dynamic Power Management (IINDPM, 100mA to 3.2A with 100mA Resolution) to Support USB 2.0 and USB 3.0 Standards and High Voltage Adaptors
• Maximum Power Tracking by Programmable Input Voltage Limit (VINDPM) with Selectable Offset
• VINDPM Tracking of Battery Voltage
• High Battery Discharge Efficiency with 10mΩ Switch
• Narrow Voltage DC (NVDC) Power Path Management
• Instant-On with No or Highly Depleted Battery
• Ideal Diode Operation in Battery Supplement Mode
• 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 All MOSFETs, Current Sense and Compensation
• 9μA Ship Mode Low Battery Leakage Current
• High Accuracy
• ±0.5% Charge Voltage Regulation (8mV/step)
• ±5% Charge Current Regulation at 1.26A
• ±7.5% Input Current Regulation at 0.5A
• Battery Temperature Sensing (Charge/Boost Modes)
• Thermal Regulation and Thermal Shutdown
• Input Under-Voltage Lockout (UVLO)
• Input Over-Voltage (ACOV) Protection

Typical applications

• Smart Phones, Portable Internet Devices and Accessory

More information

• Datasheet
• IC product information