products and disclaimers thereto appears at the end of this data sheet. With the MODE pin low, the bq/1 defaults to USB charging at the charge rate. BQ datasheet, BQ circuit, BQ data sheet: TI – SINGLE-CHIP LI -ION CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC,alldatasheet. Click on a date/time to view the file as it appeared at that time. Date/Time, Dimensions, User, Comment. current, , 7 December , ( MB), Knight (talk.
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Submit Documentation Feedback 17 bq www. If the output load exceeds the available USB current, the output instantly goes into the battery supplement mode. It can be calculated from Equation Charge voltage below recharge threshold V RCH and timeout fault occurs. It’s a community-based project which helps to repair anything. This input is tied directly adtasheet the positive side of the battery pack.
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Production processing does not necessarily include testing of all parameters. This theory is easily verified by performing a charge cycle on a discharged battery while monitoring the battery voltage and chargers power pad temperature. If VOUT datashset to the battery voltage, the battery is able to supplement the input current to the system.
See Figure 7 for power up by battery insertion. The system’s power management is responsible for keeping its system load below the USB current level selected if the battery is critically low or missing.
daatsheet Therefore, understanding the theory that the safety time is adjusted inversely proportionately with the charge current and the battery is a current-hour rating, the safety time dynamically adjusts appropriately. The DPPM control tries to reach a steady-state condition where the system gets its needed current and the battery is charged with the remaining current. Following are URLs where you can obtain information on other Texas Instruments products and application solutions: The output returns to its regulated value, and the battery dataasheet to its programmed current level.
Under USB operation, when the loads exceeds the programmed input current thresholds a similar pattern is observed. The corresponding output turns ON low when exiting sleep mode input voltage above battery voltage. Datasueet bq enters the low-power standby mode when the CE input is low with input present.
The K TMR parameter is specified in the specifications table. TI does not warrant or represent that any license, either express or datasheer, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used.
This is DPPM mode. To avoid false termination, the termination detect function is daatasheet while in this mode. Short-Circuit Recovery The output can experience two types of short-circuit protection, one associated with the input and one with the battery. The bq offers DC supply AC adapter power-path management with autonomous power-source selection, power FETs and current sensors, high-accuracy current and voltage regulation, charge status, and charge termination, in a single monolithic device.
The RHL package is available in the following options: The package includes a QFN thermal pad to provide an effective thermal contact between the device and the printed-circuit board. All voltage values are with respect to the network ground terminal unless otherwise noted.
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It does this by reducing the noncritical charging load while maintaining the maximum power output of the adaptor. This ensures proper hot plug power up with a no-load condition no system load or battery attached. Battery Charge Current The bq offers on-chip current regulation with programmable set point.
If an input source is not available, then the battery is selected as the source. T – taped and reeled in quantities of devices per reel. Once the output load is reduced, such that the mA current source can pick up the output within mV of the battery, the FET turns back on. For example, if the peak system load is bbq24070. The exposed thermal pad must be connected to the same potential as the VSS pin on the printed-circuit board.
It is difficult to estimate a total safety time without integrating the datashest equation over the charge cycle. In most applications, all that is needed is a high-frequency decoupling capacitor on the input.
The package includes a QFN thermal pad to. The device suspends charge by turning off the power FET and holding the timer value i. Note that this action eliminates all safety timers, and also clears any timer fault.
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Note that in sleep mode, Q2 remains on i. At this time, the load has to be removed to recover. This feature gives the system priority on input power, allowing the system to power up with a deeply discharged battery pack.