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TPS65010RGZT Datasheet(PDF) 19 Page - Texas Instruments |
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TPS65010RGZT Datasheet(HTML) 19 Page - Texas Instruments |
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19 / 63 page  Charge Voltage Charge Current Current Regulation Phase Voltage Regulation and Charge Termination Phase Regulation Voltage Regulation Current Minimum Charge Voltage Preconditioning and Taper Detect Pre- Conditioning Phase t(PRECHG) t(TAPER) t(CHG) TPS65010 www.ti.com SLVS149C – JUNE 2003 – REVISED SEPTEMBER 2015 7.3 Feature Description 7.3.1 Battery Charger The TPS65010 supports a precision Li-Ion or Li-Polymer charging system suitable for single-cells with either coke or graphite anodes. Charging the battery is possible even without the application processor being powered up. The TPS65010 starts charging when an input voltage on either ac or USB input is present, which is greater than the charger UVLO threshold. See Figure 25 for a typical charge profile. Figure 25. Typical Charging Profile 7.3.1.1 Autonomous Power Source Selection Per default the TPS65010 attempts to charge from the AC input. If AC input is not present, the USB is selected. If both inputs are available, the AC input has priority. The charge current is initially limited to 100 mA when charging from the USB input. This can be increased to 500 mA through the serial interface. The charger can be completely disabled through the interface, and it is also possible just to disable charging from the USB port. The start of the charging process from the USB port is delayed in order to allow the application processor time to disable USB charging, for instance if a USB OTG port is recognized. The recommended input voltage for charging from the AC input is 4.5 V < VAC < 5.5 V. However, the TPS65010 is capable of withstanding (but not charging from) up to 20 V. Charging is disabled if VAC is greater than typically 6.6 V. 7.3.1.2 Temperature Qualification The TPS65010 continuously monitors battery temperature by measuring the voltage between the TS and AGND pins. An internal current source provides the bias for most common 10K negative-temperature coefficient thermistors (NTC) (see Figure 26). The IC compares the voltage on the TS pin against the internal V(LTF) and V(HTF) thresholds to determine if charging is allowed. Once a temperature outside the V(LTF) and V(HTF) thresholds is detected the IC immediately suspends the charge. The IC suspends charge by turning off the power FET and holding the timer value (i.e., timers are not reset). Charge is resumed when the temperature returns to the normal range. The allowed temperature range for 103-A T-type thermistor is 0°C to 45°C. However the user may modify these thresholds by adding two external resistors. See Figure 27. Copyright © 2003–2015, Texas Instruments Incorporated Submit Documentation Feedback 19 Product Folder Links: TPS65010 |
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