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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If the system load exceeds the capacity of the supply, the output voltage drops down to the battery’s voltage. The output is regulated at 4.
Products Applications Amplifiers amplifier. Once the output load is reduced, dtasheet that the mA current source can pick up the output within mV of the battery, the FET turns back on. The safety timer is dynamically adjusted while in DPPM mode. This feature is designed to limit the power drawn from the input supply such as USB suspend mode. To avoid false termination, the termination detect function is disabled while in this mode. This ensures proper hot plug power up with a no-load condition no system load or battery attached.
Information published by Dstasheet regarding dahasheet products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. This small current is used to detect a battery removal condition and remains on as long as the battery voltage stays below the recharge threshold.
BQ from Texas Instruments
This feature also allows for the system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
At the 4th division, the output has reached vatasheet operation at qb24070 DPPM voltage level charge current has been reduced due to the limited USB input current.
Otherwise, the output drops to the battey voltage; therefore, the system should have a low-power mode for USB power application. Negative current is defined as datasueet flowing into the BAT pin. This could happen as a result of a load on the battery, self-discharge, or battery removal. This product is RoHS compatible, including a lead concentration that does not exceed 0. Note that this action eliminates all safety timers, and b2q4070 clears any timer fault.
If a load is present that keeps the output more than mV below the battery, a short-circuit condition is declared. The charge current is reduced until there is no further drop on the output voltage. This theory is easily verified by performing a charge cycle on a discharged battery while monitoring the battery voltage and chargers power pad temperature. This feature works as follows. If the output load exceeds the available USB current, the output instantly goes into the battery supplement mode.
This is DPPM bbq24070. The K TMR ba24070 is specified in the specifications table. The exposed thermal pad must be connected to the same potential as the VSS pin on the printed-circuit board. DPPM has three main advantages. When the battery voltage rises to the VO REG threshold, the voltage regulation phase begins and the charging current begins to taper down. TI is not responsible or liable for such altered documentation.
T – bq24007 and reeled in quantities of devices per reel. R – taped and reeled in quantities of 3, devices per reel. In addition, this product uses package materials that do not contain halogens, including bromine Br or antimony Sb above 0.
The corresponding output turns ON low when exiting sleep mode input voltage above battery voltage.
This is the battery supplement mode. See a typical charge profile, application circuit, and an operational flow chart in Figure 1 through Figure 3, datassheet.
darasheet The V SET parameter is specified in the specifications table. If an input source is not available, then the battery is selected as the source.
Table 1 indicates when this feature is enabled. Once the battery falls below the recharge threshold, the bq clears the fault and starts a new charge cycle. The Q2 FET continues to connect the battery to the output systemif input power is not sufficient; however, a short-circuit protection circuit limits the battery discharge current such that the maximum power dissipation of the part is not exceeded under typical bq240070 conditions.
TMR pin should not be left floating. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices.
This feature keeps the battery at full capacity at all times. Submit Documentation Feedback 21 bq www. TI assumes no liability for applications assistance or customer product design.
The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOSFET gates.
Note that OFF indicates the open-drain transistor is turned datasueet. The DPPM sustains the system voltage no matter what causes it to drop, if at all possible.
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This theory is easily verified by performing a charge cycle on a discharged battery while monitoring the battery voltage and chargers power pad temperature. It can be calculated from Equation The dropout voltage increases proportionally to the increase in current.
The charge level may be reduced to give the system priority on input current see DPPM. The power pad should be tied to the VSS plane. Submit Documentation Feedback 13 bq www. To minimize the datashewt associated with customer products and applications, customers should provide adequate design and operating safeguards. The bq powers the system while independently charging the battery.