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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The voltage on the ISET1 pin is directly proportional dtaasheet the programmed charging current. This feature prevents draining the battery into the bq during the absence of input supply.
The rate of discharge on the output is a function of system capacitance and load. Charge is resumed when the temperature returns to the normal range. Pulsing this pin below 1 V, for a few microseconds, should be enough to recover. The IC design is focused on supplying continuous power to the system when available from the AC adapter or battery sources. Please be aware that datashet important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
TI does not warrant or represent that any license, either express or implied, 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.
The bq powers the system while independently charging the battery. Customers should datashset the latest relevant information before placing orders and should verify that such information is current and complete.
Datasheeet assumes no liability for applications assistance or customer product design. No active control limits the current to the system; therefore, if the system demands more current than the input can provide, the output voltage drops just below the battery voltage and Q2 turns on which supplements the input current to the system.
Note that in sleep mode, Q2 remains on i. VSS pin must be connected to ground at all times. If the output load exceeds the available USB current, the output instantly goes into the battery supplement mode.
If a load is present that keeps bq240700 output more than mV below the battery, a short-circuit condition is declared.
Under USB vatasheet, when the loads exceeds the programmed input current thresholds a similar pattern is observed. The efficiency for charging the battery is the same for both cases. During the system peak load of 1. 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.
Dynamic Power-Path Management DPPM This feature monitors the output voltage system voltage for input power loss due to brown outs, datashete limiting, or removal bq24007 the input supply. TI is not responsible or liable for such altered documentation.
The device suspends charge by turning off the power FET and holding the timer value i. This input is tied directly to the positive side of the battery pack. Battery Charge Current The bq offers on-chip current regulation with programmable set point. This ensures proper hot plug power up with a no-load condition no system load or battery attached. TS Pin Configuration Figure Following are URLs where you can obtain information on other Texas Instruments products and application solutions: This feature reduces the charge and discharge cycles on the battery, allows for proper charge termination and allows the system to run with an absent or defective battery pack.
The bq enters the low-power standby mode if while input power is present, the CE input is low. This feature is designed to limit the power drawn from the input supply such as USB suspend mode. Charge voltage above recharge threshold V RCH and timeout fault occurs. To avoid false termination, the termination detect function is disabled while in this mode.
TI is not responsible or liable for any such statements. This theory is easily. Therefore, it is customary to perform the steady-state thermal design using 3. Temperature Regulation and Thermal Protection In order to maximize charge rate, the bq features darasheet junction temperature regulation loop.
This is the battery supplement mode. In most applications, all that is needed is a high-frequency daatsheet capacitor on the input. The DPPM feature keeps the output from dropping below its programmed threshold, due to the battery charging current, by reducing the charging current. The advantages include less power dissipation, lower system temperature, and better overall efficiency.