AXBM20455

AXBM20455 One Cell Lithium-ion/Polymer Battery Protection IC with Thermal Detector Datasheet – 18 Aug 2021 Description AXBM20455 is a high integration solution for lithium ion/polymer battery protection designed in BCD (Bipolar, CMOS, DMOS) technology. Integrated are high-accuracy voltage detection circuits and protection detection delay circuits. Packaged into an DFN8 package, it makes an ideal solution in limited space of battery pack. AXBM20455 has all the protection functions required in the battery application including battery thermal detector, 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 ▪ Thermal detector ▪ ▪ ▪ ▪ ▪ Low current consumption: 1.2A (typ) in operation; 0.04A (max) 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 2kV ESD (HBM) ▪ Applications ▪ Mobile phones ▪ Power banks ▪ Any Li-ion / Polymer battery-powered appliances Table 1 Device Summary Order code AXBM20455 Aug 2021 Package DFN8 Packing Reel (2.0 x 2.0 x 0.75) DFN8 Rev 2.00 1 Contents Description .............................................................................................................................................. 1 Features .................................................................................................................................................. 1 Applications............................................................................................................................................. 1 1 Block Diagram and Application Circuit .......................................................................................... 4 2 Pin Description .............................................................................................................................. 5 2.1 2.2 Pin Names ............................................................................................................................... 5 Pin Functions .......................................................................................................................... 5 Electrical Specifications ................................................................................................................. 6 3.1 3.2 3.3 3.4 Absolute Maximum Ratings .................................................................................................... 6 Thermal Data .......................................................................................................................... 6 ESD and Latch Up .................................................................................................................... 6 Electrical Characteristics ......................................................................................................... 7 Functional Description .................................................................................................................. 8 3. 4 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 Thermal Detector.................................................................................................................. 10 4.11 Timing Diagrams ................................................................................................................... 11 5 Package Information ................................................................................................................... 14 5.1 5.2 5.2 6 Package Dimensions ............................................................................................................. 14 Marking Information ............................................................................................................ 15 Reel Packing Information...................................................................................................... 16 Revision History........................................................................................................................... 17 Aug 2021 Rev 2.00 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 Thermal Detection (Charger Connects) .................................................................................. 13 Figure 9 Thermal Detection (Load Connects) ....................................................................................... 13 Figure 10 DFN8 (2.0x2.0x0.75) Mechanical Data and Package Dimensions ......................................... 14 Figure 11 Device Markings .................................................................................................................... 15 Figure 12 Reel Information ................................................................................................................... 16 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 ...................................................................................................... 17 Aug 2021 Rev 2.00 3 1 Block Diagram and Application Circuit Figure 1 Block Diagram Figure 2 Application Circuit * In applications where small battery capacity (