BQ21040: Device behavior when battery is not available

JUSTIN JOSE

Prodigy 30 points

Part Number: BQ21040

Please explain what is the behavior of the BQ21040 if battery is not connected

over 7 years ago

0 Bill Johns over 7 years ago

TI__Guru* 75656 points

If the NTC is part of the battery pack the TS pin will float and unit will enter TTDM mode. Voltage will be present at output and battery detection will be active. See section 8.4.6 also figure 18 to 21.

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BQ21040: Device behavior when battery is not available