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BQ24100_08 Datasheet, PDF (17/38 Pages) Texas Instruments – SYNCHRONOUS SWITCHMODE, LI-ION AND LI-POLYMER CHARGE-MANAGEMENT IC WITH INTEGRATED POWER FETs (bqSWITCHER™)
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bq24100, bq24103, bq24103A
bq24104, bq24105, bq24108, bq24109
bq24113, bq24113A, bq24115
www.ti.com .................................................................................................................................................. SLUS606N – JUNE 2004 – REVISED NOVEMBER 2008
Sleep Mode
The bqSWITCHER enters the low-power sleep mode if the VCC pin is removed from the circuit. This feature
prevents draining the battery during the absence of VCC.
Charge Status Outputs
The open-drain STAT1 and STAT2 outputs indicate various charger operations as shown in Table 1. These
status pins can be used to drive LEDs or communicate to the host processor. Note that OFF indicates that the
open-drain transistor is turned off.
Table 1. Status Pins Summary
Charge State
Charge-in-progress
Charge complete
Charge suspend, timer fault, overvoltage, sleep mode, battery absent
STAT1
ON
OFF
OFF
STAT2
OFF
ON
OFF
Table 2. Status Pins Summary (bq24104, bq24108 and bq24109 only)
Charge State
Battery absent
Charge-in-progress
Charge complete
Battery over discharge, VI(BAT) < V(SC)
Charge suspend (due to TS pin and internal thermal protection)
Precharge timer fault
Fast charge timer fault
Sleep mode
STAT1
OFF
ON
OFF
ON/OFF (0.5 Hz)
ON/OFF (0.5 Hz)
ON/OFF (0.5 Hz)
ON/OFF (0.5 Hz)
OFF
STAT2
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
PG Output
The open-drain PG (power good) indicates when the AC-to-DC adapter (i.e., VCC) is present. The output turns on
when sleep-mode exit threshold, VSLP-EXIT, is detected. This output is turned off in the sleep mode. The PG pin
can be used to drive an LED or communicate to the host processor.
CE Input (Charge Enable)
The CE digital input is used to disable or enable the charge process. A low-level signal on this pin enables the
charge and a high-level VCC signal disables the charge. A high-to-low transition on this pin also resets all timers
and fault conditions. Note that the CE pin cannot be pulled up to VTSB voltage. This may create power-up
issues.
Copyright © 2004–2008, Texas Instruments Incorporated
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Product Folder Link(s): bq24100 bq24103 bq24103A bq24104 bq24105 bq24108 bq24109 bq24113 bq24113A
bq24115
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