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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This proprietary feature is designed to prevent against early or false termination. The following provides some guidelines: 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 datashee which TI products or services are used.
As a safety backup, the bq also monitors the charge time in the charge mode. Power-Path Management Case 1: Bq24700 Q2 FET continues to connect the battery to the output systemif input power is not sufficient; however, datsaheet short-circuit protection circuit limits the battery discharge current such that the maximum power dissipation of the part is not exceeded under typical design conditions.
This feature keeps the battery at full capacity at all times. Satasheet following summarizes this method: Turning off the active source before turning on the replacement source is referred to as break-before-make switching. During the system peak load of 1. The DPPM sustains the system voltage no matter what causes it to drop, if at all possible. 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.
Power-Path Management The bq powers the system while independently charging 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.
BQ Datasheet(PDF) – TI store
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.
Short-Circuit Recovery The output can experience two types of short-circuit protection, one associated with the input and one with the battery.
The rate of discharge on the output is a function of system capacitance and load. Charge voltage above recharge threshold V RCH and timeout fault occurs. This output is turned off in the sleep mode open drain. Production processing does not necessarily include testing of all parameters. 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.
It does this by reducing the noncritical charging load while maintaining the maximum power output of the adaptor. The output is regulated at 4. Submit Documentation Feedback 15 bq www. T – taped and reeled in quantities of devices per reel. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty.
These status pins can be used to drive LEDs or communicate to the host processor. TI assumes no liability for applications assistance or customer product design.
Charge voltage below recharge threshold V RCH and timeout fault occurs. In addition, this product uses package materials that do not contain halogens, including bromine Br or antimony Sb above 0.
The package includes a QFN thermal pad to provide an effective thermal contact between the device and the printed-circuit board PCB.
To avoid false termination, the termination detect function bq4070 disabled while in this mode. Home – IC Supply – Link. This is DPPM mode. When the output load current is reduced, the operation described is reversed as shown. Submit Documentation Feedback 21 bq www. The IC design is focused on supplying continuous power to the system when available from the AC adapter or battery sources.
Why can’t my BQ charge up ?. – OnePlus Community
Products Applications Amplifiers amplifier. This feature gives the system priority on input bq2470, allowing the system to power up with a deeply discharged battery pack.
SF is the scale factor as specified in the specification table. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
For internal compensation, the VREF pin requires a minimum 0. Submit Documentation Feedback bq www. Dynamic Power-Path Management DPPM This feature monitors the output voltage system voltage for input power loss due to brown outs, current limiting, or removal of the input supply.
R – taped and reeled in quantities of 3, devices per reel. The output returns to its regulated value, and the battery returns to its programmed current level. The voltage on the ISET1 pin is directly proportional to the programmed charging current.
Because the charge current typically is programmed for more current than the USB current limit allows, the output voltage drops to the battery voltage or DPPM voltage, whichever is higher. The package includes a QFN thermal pad datashet provide an effective thermal contact between the device and the printed-circuit board.
This feature is designed to limit the power drawn from the input supply such as USB suspend mode. Too large a capacitance on this pin too much of a delay could allow too-high currents if the output was shorted to ground.
This is the battery supplement mode. I DPPM is the internal current source.