BQ27510-G1 Datasheet, PDF (25/39 Pages) Texas Instruments – System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection

bq27510-G1
www.ti.com ..................................................................................................................................................................................................... SLUS927 – APRIL 2009
When PFC = 1, the bq27505 can indicate when battery temperature has fallen below or risen above predefined
thresholds Suspend Low Temp or Suspend High Temp, respectively. In this mode, the [XCHG] bit is set to
indicate this condition. The [XCHG] bit is cleared once the battery temperature returns to the range [Charge
Inhibit Temp Low + Temp Hys, Charge Inhibit Temp High – Temp Hys].
The charging should not start when the temperature is below the Charge Inhibit Temp Low or above the Charge
Inhibit Temp High. The charging can continue if the charging starts inside the window [Charge Inhibit Temp Low,
Charge Inhibit Temp High] until the temperature is either below Suspend Low Temp or above the Suspend Low
Temp. Therefore, the window [Charge Inhibit Temp Low, Charge Inhibit Temp High] must be inside the window
of [Suspend Low Temp, Suspend High Temp].
POWER MODES
The bq27510 has four power modes: NORMAL, SLEEP, HIBERNATE and BAT INSERT CHECK. In NORMAL
mode, the bq27510 is fully powered and can execute any allowable task. In SLEEP mode the fuel gauge exists
in a reduced-power state, periodically taking measurements and performing calculations. In HIBERNATE mode,
the fuel gauge is in a very low power state, but can be woken up by communication. Finally, the BAT INSERT
CHECK mode is a powered-up, but low-power halted, state, where the bq27510 resides when no battery is
inserted into the system.
The relationship between these modes is shown in Figure 2.
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): bq27510-G1
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