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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Note that in sleep mode, Q2 remains on i. Information published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. To avoid false termination, the termination detect function is disabled while in this mode.
If a load is present that keeps the output more than mV below the battery, a short-circuit condition is declared.
Turning off the active source before turning on the replacement source is referred to as break-before-make switching.
The current remains high at current limit and the voltage drop is large for datawheet power dissipation. This feature is designed to limit the power drawn from the input supply such as USB suspend mode. Power-Path Management The bq powers the system while independently charging the battery.
The bq powers the system while independently charging the battery.
T – taped and reeled in quantities of devices per reel. Timer Fault Recovery As shown in Figure 3, bq provides a bq244070 method to deal with timer fault conditions.
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The output is regulated at 4. Submit Documentation Feedback 15 bq www. The safety timer is dynamically adjusted while in DPPM mode. Submit Documentation Feedback 5 datashewt www.
The dropout voltage increases proportionally to the increase in current. The timeout is extended if the charge current is reduced by DPPM or thermal regulation.
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. The package includes a QFN thermal pad to. The advantages include less power dissipation, lower system temperature, and better overall efficiency.
VSS pin must be connected to ground at all times. For example, if the peak system load is 1. Charge voltage above recharge threshold V RCH and timeout fault occurs. The battery supplement mode has no thermal protection. Boot-Up Sequence In order to facilitate the system start-up and USB enumeration, the bq offers a proprietary boot-up sequence.
The DPPM feature keeps the output from dropping below its programmed threshold, due to the battery charging current, by reducing the charging current.
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This ensures proper hot plug power up with a no-load condition no system load or battery attached. This ensures proper hot plug power up with a no-load condition no system load or battery attached.
Note that charge current is dynamically adjusted during the thermal regulation or DPPM mode.
The RHL package is available in the following options: The charge current is reduced until there is no further drop on the output voltage. The package includes a QFN thermal pad to provide an effective thermal contact between the device and the printed-circuit board PCB.
R – taped and reeled in quantities of 3, devices per reel. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice.
If the battery voltage goes above the recharge threshold, then the bq disables the I FAULT current and executes the recovery method described for condition 1.