AXBM20490

AXBM20490x 0.4A One Cell Lithium-ion/Polymer Battery Protection IC with 1nA Deep Sleep mode for shipping Datasheet – 16 Aug 2021 Description AXBM20490x is a high integration solution for lithium ion/polymer battery protection designed in BCD (Bipolar, CMOS, DMOS) technology with special attention to enhanced safety and low current consumption. Integrated are smart power mosfet, high-accuracy voltage detection circuits, and protection detection delay circuits. AXBM20490x integrates a transport mode circuit and can be commanded into Deep Sleep power down mode with 1nA IPD during shipping, to be awaken on charger connect detection or external button control. Along with ultra-low operation Iq of 0.85µA, reverse battery protection and zero voltage charging, it is ideal for any Li-Ion and Li Poly battery-powered information appliances such as wearables requiring long term battery life. Packaged into an DFN4,1X1x0.37 package, it makes an ideal solution in limited space of battery pack. Features ▪ ▪ ▪ ▪ ▪ ▪ Integrated smart power mosfet, with Rdson 100m (typ). Charging and discharging current 0.4A (typ). Low current consumption: 0.85A (typ) in operation; 1nA (typ) in Deep Sleep powerdown. Charger connect detection. High accuracy voltage detection. Protections: over-charge voltage, overdischarge voltage, over-charge current, over-discharge current, load short, overtemperature. ▪ ▪ ▪ ▪ ▪ Zero volt battery charging. 4kV ESD (HBM). Reverse Battery protection without external resistor and capacitor. External control for entering and awakening from Deep Sleep power-down shipping mode. Optional external capacitor and resistor for stable power supply application. Applications ▪ ▪ ▪ TWS Wearables Any Li-ion / Polymer battery powered appliances Packaging Order code Package Packing AXBM20490x x: A=4.28V VOC B=4.42V VOC Aug 2021 Reel DFN4 epad 1.0 x 1.0 x 0.37 Rev 1.10 1 Contents Description ......................................................................................................................... 1 Features............................................................................................................................. 1 Applications........................................................................................................................ 1 Packaging .......................................................................................................................... 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 Deep Sleep............................................................................................................. 9 4.9 Delay Circuits ....................................................................................................... 10 4.10 0V Battery Charging Function ............................................................................... 10 4.11 Timing Diagrams .................................................................................................. 11 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 ............................................. 11 Figure 5 Over-discharge Current Detection ......................................................................... 11 Figure 6 Charger Detection ................................................................................................. 12 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 Pin Functions ........................................................................................................... 5 Table 2 Absolute Maximum Ratings ...................................................................................... 6 Table 3 Thermal Data ........................................................................................................... 6 Table 4 ESD and Latch up .................................................................................................... 6 Table 5 Electrical Characteristics .......................................................................................... 7 Table 6 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 (