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BQ24160YFFR Datasheet(PDF) 2 Page - Texas Instruments |
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BQ24160YFFR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 44 page bq24160, bq24161 bq24163, bq24168 SLUSAO0A – NOVEMBER 2011 – REVISED MARCH 2012 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. DESCRIPTION (CONTINUED) The power path management feature allows the bq2416x to power the system from a high-efficiency DC-to-DC converter while simultaneously and independently charging the battery. 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. This allows for proper charge termination and timer operation. Under normal battery charging conditions, the system voltage is approximately equal to the battery voltage, however if the battery is deeply discharged, the system voltage does not drop below 3.5V. This minimum system voltage support enables the system to run with a defective or absent battery pack and enables instant system turn-on even with a totally discharged battery or no battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents. This enables the use of a smaller adapter. The 2.5A input current capability allows for GSM phone calls as soon as the adapter is plugged in regardless of the battery voltage. The charge parameters are programmable using the I2C interface. The battery is charged in three phases: precharge, fast-charge constant current and constant voltage. 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. Additionally, a voltage-based battery pack thermistor monitoring input (TS) is included that monitors battery temperature for safe charging. The TS function for bq24160, bq24163 and bq24168 is JEITA compatible. 2 Copyright © 2011–2012, Texas Instruments Incorporated |
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