SGM41511 I²C Controlled 3A Single-Cell Battery Charger with High Input Voltage Capability and Narrow Voltage DC (NVDC) Power Path Management
●The SGM41511 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.
●A wide range of input sources are supported, including standard USB hosts, charging ports and USB compliant high voltage adapters. The default input current limit is automatically selected based on the built-in USB interface.
●This limit is determined by the detection circuit in the system (e.g. USB PHY). SGM41511 is USB 2.0 and USB 3.0 power specifications compliant with input current and voltage regulation. It also meets USB On-The-Go (OTG) power rating specification and is capable to boost the battery voltage to supply 5.15V on VBUS with 1.2A (or 0.5A) current limit.
●The system voltage is regulated slightly above the battery voltage by the power path management circuit and is kept above the programmable minimum system voltage (3.5V by default). Therefore, system power is maintained even if the battery is completely depleted or removed. Dynamic power management (DPM) feature is also included that automatically reduces the charge current if the input current or voltage limit is reached. If the system load continues to increase after reduction of charge current down to zero, the power path management provides the deficit from battery by discharging battery to the system until the system power demand is fulfilled. This is called supplement mode, which prevents the input source from overloading.
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[ tablets ][ portable systems ][ Smart Phones ][ EPOS ][ Portable Internet Devices ][ Portable Internet Accessory ] |
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Datasheet |
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Please see the document for details |
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TQFN-4×4-24L |
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English Chinese Chinese and English Japanese |
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JUNE 2022 |
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REV. A. 2 |
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3.1 MB |
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