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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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(PDF) bq24070 Datasheet download

Home – IC Supply – Link. Timer Fault Recovery As shown in Figure 3, bq dwtasheet a recovery method to deal with timer fault conditions. This feature allows the designer to select a lower power wall adapter, if the average system load is moderate compared to its peak power.

To recover from this state, there is a mA current source from the battery to the output. When the output load current is reduced, the operation described is reversed as shown.

If the power dissipation of vatasheet IC results in a junction temperature greater than the TJ REG threshold, the bq throttles back on the charge current in order to maintain a junction temperature around the TJ REG threshold. The dropout voltage increases proportionally to the increase in current. This feature prevents draining the battery into the bq during the absence of input supply.

BQ Datasheet(PDF) – TI store

Table 1 indicates when this feature is enabled. The bq only requires a small output capacitor for loop stability. The device suspends charge by datasheef off the power FET and holding the timer value i.


This ensures proper hot plug power up with a no-load condition no system load or battery attached. Charge is resumed when the temperature returns to the normal range. 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.

The package includes a QFN thermal pad to provide an effective thermal contact between the device and the printed-circuit board PCB. This feature gives the system priority on input power, allowing the system to power up with a deeply discharged battery pack.

Specification is for monitoring charge current via the ISET1 pin during voltage regulation mode, not for a reduced fast-charge level. This input is tied directly to the positive side of the battery pack. TI assumes no liability for applications assistance or customer product design. Charge Timer Operation As a safety backup, the bq monitors the charge time in the charge mode.

Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Submit Documentation Feedback 19 bq www.

The bq powers the system while independently charging the battery. 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. Note that daatasheet current is dynamically adjusted during the thermal regulation or DPPM mode. Charge Profile Submit Documentation Feedback 9 bq www. This theory is easily verified by performing a charge cycle on a discharged battery while monitoring the battery voltage and chargers power pad temperature.


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.

Charge voltage above recharge threshold V RCH and timeout fault occurs. To avoid false termination, the termination detect function is disabled while in datasyeet mode. See theTimer Fault Recovery section for additional details.

BQ Datasheet PDF – Texas Instruments

This small current is used to detect a battery removal condition and remains b24070 as long as the battery voltage stays below the recharge threshold. Too large a capacitance on this pin too much of a delay could allow too-high currents if the output was shorted to ground.

The package includes a QFN thermal pad to provide an effective thermal contact between the device and the printed-circuit board.

The advantages include less power dissipation, lower system temperature, and better overall efficiency. Short-Circuit Recovery The output can experience two types of short-circuit protection, one associated with the input and one with the datashewt.