AXBM20341

AXBM20341x 0.4A One Cell Lithium-ion/Polymer Battery Protection IC Datasheet – 16 Aug 2021 Description AXBM20341x is a high integration solution for lithium ion/polymer battery protection designed in BCD (Bipolar, CMOS, DMOS) technology. Integrated are smart power mosfet, high-accuracy voltage detection circuits and protection detection delay circuits. Packaged into an DFN4,1X1x0.37 package, it makes an ideal solution in limited space of battery pack. AXBM20341x has all the protection functions required in the battery application including over-charging, over-discharging, over-current and load short circuiting protection. The accurate over-charging detection voltage ensures safe and full utilization charging. The ultra-low standby current drains little current from the cell while in storage. The device is not only targeted for digital cellular phones, but also for any other Li-Ion and Li Poly battery-powered information appliances such as wearables requiring long term battery life. Features ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ Integrated smart power mosfet, with Rdson 100m (typ). Charging and discharging current 0.4A (typ). Low current consumption: 0.7A (typ) in operation; 1nA (typ) in power-down. Charger detection. High accuracy voltage detection. Delay times generated internally. Protections: reverse battery, over-charge voltage, over-discharge voltage, over-charge current, over-discharge current, load short, over-temperature. 4kV ESD (HBM). Applications ▪ ▪ ▪ TWS Wearables Any Li-ion / Polymer battery-powered appliances Table 1 Device Summary Order code AXBM20341x x: A=4.28V VOC B=4.42V VOC Aug 2021 Package DFN4 epad Packing Reel 1.0 x 1.0 x 0.37 DFN4 epad 1.0 x 1.0 x 0.37 Rev 1.10 1 Contents Description ............................................................................................................................ 1 Features……………………………………………………………………………………………….1 Applications .......................................................................................................................... 1 1 Block Diagram and Application Circuit ............................................................................... 4 2 Pin Description ................................................................................................................... 5 2.1 Pin Names .................................................................................................................. 5 2.2 Pin Functions .............................................................................................................. 5 3 Electrical Specifications ..................................................................................................... 6 3.1 Absolute Maximum Ratings ........................................................................................ 6 3.2 Thermal Data .............................................................................................................. 6 3.3 ESD and Latch Up ...................................................................................................... 6 3.4 Electrical Characteristics ............................................................................................. 7 4 Functional Description........................................................................................................ 8 4.1 Overview..................................................................................................................... 8 4.2 Normal Operating Mode .............................................................................................. 8 4.3 Over-charge Condition ................................................................................................ 8 4.4 Over-discharge Condition ........................................................................................... 8 4.5 Over-current Condition ................................................................................................ 9 4.6 Abnormal Charge Current Detection ........................................................................... 9 4.7 Load Short Condition .................................................................................................. 9 4.8 Delay Circuits.............................................................................................................. 9 4.9 0V Battery Charging Function ................................................................................... 10 4.10 Timing Diagrams ....................................................................................................... 10 5 Package Information ........................................................................................................ 13 5.1 Package Outline Dimensions .................................................................................... 13 5.2 Package Marking Information ................................................................................... 14 6 Packing Information ......................................................................................................... 15 7 Revision History ............................................................................................................... 16 Aug 2021 Rev 1.10 2 List of Figures Figure 1 Block Diagram......................................................................................................... 4 Figure 2 Application Circuit ................................................................................................... 4 Figure 3 Pin Connection........................................................................................................ 5 Figure 4 Over-charge and Over-discharge Voltage Detection ............................................. 10 Figure 5 Over-discharge Current Detection ......................................................................... 11 Figure 6 Charger Detection ................................................................................................. 11 Figure 7 Abnormal Charger Detection ................................................................................. 12 Figure 8 DFN4 EPAD 1.0 x 1.0 x 0.37 mm Mechanical Data and Package Dimensions ...... 13 Figure 9 DFN4 EPAD 1.0 x 1.0 x 0.37 mm Marking Information .......................................... 14 Figure 10 Reel Packing Information .................................................................................... 15 List of Tables Table 1 Device Summary ...................................................................................................... 1 Table 2 Pin Functions ........................................................................................................... 5 Table 3 Absolute Maximum Ratings ...................................................................................... 6 Table 4 Thermal Data ........................................................................................................... 6 Table 5 ESD and Latch up .................................................................................................... 6 Table 6 Electrical Characteristics .......................................................................................... 7 Table 7 Document Revision History .................................................................................... 16 Aug 2021 Rev 1.10 3 1 Block Diagram and Application Circuit Figure 1 Block Diagram Figure 2 Application Circuit * In applications where small battery capacity (