Additionally, a voltage-based, JEITA compatible battery pack thermistor monitoring input (TS) that monitors battery temperature for safe charging is included. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded. The battery is charged in four phases: trickle charge, precharge, constant current, and constant voltage. This supplementation of current requirements enables the use of a smaller adapter. The architecture of the power-path management also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. Additionally, this reduced charge current enables instant system turnon even with a totally discharged battery or no battery. This reduced charge current allows for proper charge termination and enables the system to run with a defective or absent battery pack. The charger monitors the battery current at all times and reduces the charge current when the system load requires current above the input current limit. The power-path management feature allows the bq24250, bq24251, and bq24253 to power the system from a high-efficiency DC-DC converter while simultaneously and independently charging the battery. ![]() The single-cell charger has a single input that operates from either a USB port or an AC wall adapter for a versatile solution. The bq24250, bq24251, and bq24253 are highly integrated single-cell Li-Ion battery chargers and system power-path management devices targeted for space-limited, portable applications with high-capacity batteries. Charge Time Optimizer for Improved Charge.AnyBoot Robust Battery Detection Algorithm.Operating at 3 MHz for Small Inductor Support Synchronous Fixed-Frequency PWM Controller.Low R DS(on) Integrated Power FETs for a Charging.22 V Absolute Maximum Input Voltage Rating.Input UVLO, Input Overvoltage Protection.I LIM up to 2 A With Current Monitoring Output.I CHG up to 2 A With Current Monitoring Output.Programmable Input Overvoltage Protection.Programmable Input Voltage-Based Dynamic.Programmable Input Current Limit (I LIM).In Host Mode (After I 2C Communication Starts.Selectable Input Current Limit of 100 mA,.Startup System From Deeply Discharged or.High-Efficiency Switched-Mode Charger With.parametric-filter Battery monitors & balancers.parametric-filter Battery authentication ICs.parametric-filter USB power switches & charging port controllers.parametric-filter Supervisor & reset ICs.parametric-filter Power-supply filter ICs.parametric-filter Power over Ethernet (PoE) ICs.parametric-filter Multi-channel ICs (PMICs).parametric-filter Linear & low-dropout (LDO) regulators.parametric-filter LCD & OLED display power & drivers.parametric-filter Gallium nitride (GaN) ICs.parametric-filter DC/DC switching regulators.parametric-filter Battery management ICs.parametric-filter AC/DC & isolated DC/DC switching regulators. ![]() parametric-filter Wireless connectivity.parametric-filter Switches & multiplexers.parametric-filter Microcontrollers (MCUs) & processors.parametric-filter Logic & voltage translation.
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